Spartak Gevorgian

Professor at Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Spartak Gevorgian received the M.S. degree in radioelectronics from the Yerevan Polytechnic Institute, Yerevan, Armenia, in 1972, and the Ph.D. and Dr.Sci. degrees from the Electrotechnical University, St. Petersburg, Russia, in 1977 and 1991, respectively. From 1972 to 1993, he held different research and teaching positions with the Yerevan Polytechnic Institute and the Electrotechnical University. From 1993 to 1998, he held research positions with Chalmers University of Technology, Göteborg, Sweden. Since 1998, he has been a Professor with Chalmers University of Technology. Since 1996, he has also worked part time with Ericsson Microwave Systems AB (currently Ericsson AB), Mölndal, Sweden. He has authored or coauthored over 300 papers and conference presentations. He holds over 30 patents/patent applications. His research interests are physics, design, and experimental investigation of microwave devices and components based on ferroelectrics, silicon RF integrated circuits (RFICs) and monolithic microwave integrated circuits (MMICs), microwave photonic devices (optically controlled components), and modeling of passive coplanar components based on conformal mapping.

Source: chalmers.se

Projects

2012–2014

Switchable and tunable composite film bulk acoustic wave resonators (CompFBAR)

Spartak Gevorgian Terahertz and Millimetre Wave Laboratory
Swedish Research Council (VR)

2013–2015

Integrated graphene/ferroelectric films for microwave/THz devices

Jan Stake Terahertz and Millimetre Wave Laboratory
Andrei Vorobiev Terahertz and Millimetre Wave Laboratory
Spartak Gevorgian Terahertz and Millimetre Wave Laboratory
MICHAEL ANDERSSON Terahertz and Millimetre Wave Laboratory
Swedish Research Council (VR)

2010–2015

Photonic Advanced Research And Development for Integrated Generic Manufacturing (PARADIGM)

Spartak Gevorgian Terahertz and Millimetre Wave Laboratory
European Commission (FP7)

There might be more projects where Spartak Gevorgian participates, but you have to be logged in as a Chalmers employee to see them.

Publications

2017

Dielectric properties of Mn doped Bismuth Barium Titanate based ceramic thin films prepared by PLD technique

Shoaib Alam Mallick, Andrei Vorobiev, Z. Ahmad et al
Ceramics International. Vol. 43 (12), p. 8778-8783
Scientific journal article - peer reviewed
2015

Tunable ferroelectric FBARs: An overview

Andrei Vorobiev, Spartak Gevorgian,
13th European Meeting on Ferroelectricity, EMF-2015 proceedings
Conference paper - peer reviewed
2015

Composite Ferroelectric FBARs That Are Switchable Between the First and Second Harmonics: Experimental Demonstration

Andrei Vorobiev, Spartak Gevorgian,
Ieee Transactions on Ultrasonics Ferroelectrics and Frequency Control. Vol. 62 (3), p. 565-575
Scientific journal article - peer reviewed
2014

Intrinsically switchable bulk acoustic wave resonators based on paraelectric films

Andrei Vorobiev, Spartak Gevorgian,
2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014, Rome, Italy, 6-9 October 2014, p. 347-350
Conference paper - peer reviewed
2014

Tunable microwave arrangements

Spartak Gevorgian, Anatoli Deleniv, Thomas Lewin et al
Patent
2014

Extraction of carrier transport properties in graphene from microwave measurements

Michael Andersson, Andrei Vorobiev, Spartak Gevorgian et al
European Microwave Conference (EuMC), 2014 44th , p. 359 - 362
Conference paper - peer reviewed
2014

Comparison of carrier scattering mechanisms in chemical vapor deposited graphene on fused silica and strontium titanite substrates

Michael Andersson, Andrei Vorobiev, Spartak Gevorgian et al
Graphene Week 2014
Conference paper - peer reviewed
2014

Intrinsically tunable bulk acoustic wave resonators based on sol-gel grown PMN-PT films

Andrei Vorobiev, Matjaz Spreitzer, Asja Veber et al
Journal of Applied Physics. Vol. 116 (6), p. Art. no. 064101
Scientific journal article - peer reviewed
2014

Intrinsically Switchable and Tuneable FBARs for Microwave Communication and Sensor Applications

Andrei Vorobiev, Spartak Gevorgian,
GigaHertz Symposium, p. 43
Conference paper - peer reviewed
2014

Intrinsically switchable thin film bulk acoustic wave resonators

Andrei Vorobiev, Spartak Gevorgian,
Applied Physics Letters. Vol. 104 (22), p. Art. no. 222905
Scientific journal article - peer reviewed
2014

Impact of the electrode material and shape on performance of intrinsically tunable ferroelectric FBARs

Andrei Vorobiev, Spartak Gevorgian,
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. Vol. 61 (5), p. 840-848
Scientific journal article - peer reviewed
2014

Effect of growth conditions on microstructure of BiFeO3-0.33BaTiO(3) films and performance of bulk acoustic wave resonators

Andrei Vorobiev, Markus Löffler, Eva Olsson et al
Journal of Applied Physics. Vol. 115 (8)
Scientific journal article - peer reviewed
2013

Tunable FBARs based on sol-gel grown PMN-PT films

Andrei Vorobiev, Spartak Gevorgian, M. Spreitzer et al
43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013, Nuremberg, Germany, 7-10 October 2013, p. 1339-1342
Conference paper - peer reviewed
2013

Loss balance in tunable ferroelectric FBARs

Spartak Gevorgian, Andrei Vorobiev,
43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013, Nuremberg, Germany, 7-10 October 2013, p. 1343-1346
Conference paper - peer reviewed
2013

Tunable delay line arrangement

Spartak Gevorgian, Bengt-Erik Olsson,
Patent application
2013

Loss balance in tunable ferroelectric FBARs

Spartak Gevorgian, Andrei Vorobiev,
8th European Microwave Integrated Circuits Conference, EuMIC 2013 - Held as Part of 16th European Microwave Week, EuMW 2013; Nuremberg; Germany; 6 October 2013 through 8 October 2013, p. 372-375
Conference paper - peer reviewed
2013

Tunable FBARs Based on Sol-Gel Grown PMN-PT Films

Andrei Vorobiev, Spartak Gevorgian, Spreitzer Matjaz et al
8th European Microwave Integrated Circuits Conference, EuMIC 2013 - Held as Part of 16th European Microwave Week, EuMW 2013; Nuremberg; Germany; 6 October 2013 through 8 October 2013, p. 368-371
Conference paper - peer reviewed
2013

Ferroelectric film bulk acoustic wave resonators for liquid viscosity sensing

Andrei Vorobiev, Spartak Gevorgian,
IEEE—UFFC joint symposia, 21—25 July, 2013, Prague
Conference paper - peer reviewed
2013

Effect of Growth Conditions on Performance of BiFeO3-0.33BaTiO3 BAW Resonators

Andrei Vorobiev, Spartak Gevorgian, Markus Löffler et al
IEEE—UFFC joint symposia on 21—25 July 2013, Prague
Conference paper - peer reviewed
2013

Microwave characterization of Ti/Au-graphene contacts

Michael Andersson, Andrei Vorobiev, Jie Sun et al
Applied Physics Letters. Vol. 103 (17), p. 173111
Scientific journal article - peer reviewed
2013

Ferroelectric film bulk acoustic wave resonators for liquid viscosity sensing

Andrei Vorobiev, Spartak Gevorgian,
Journal of Applied Physics. Vol. 114 (8)
Scientific journal article - peer reviewed
2013

Enhanced tunable performance of high Q-factor BaxSr1-xTiO3 film bulk acoustic wave resonators

Andrei Vorobiev, Spartak Gevorgian,
International Journal of Microwave and Wireless Technologies. Vol. 5 (3), p. 361-369
Scientific journal article - peer reviewed
2013

Impedance of DC-Bias-Controlled Composite FBARs

Spartak Gevorgian, Andrei Vorobiev,
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. Vol. 60 (4), p. 795-804
Scientific journal article - peer reviewed
2013

Tuneable Film Bulk Acoustic Wave Resonators

Spartak Gevorgian, Andrei Vorobiev, Alexander Tagantsev et al
Monograph, book
2012

Tunable BiFeO3-BaTiO3 thin film bulk acoustic wave resonators for microwave applications

Andrei Vorobiev, Spartak Gevorgian, Norayer Martirosyan et al
CIMTEC 2012, Smart Materials, Structures and Systems, (June 10-14, 2012, Montecatini Terme, Italy)
Conference paper - peer reviewed
2012

Improved Tunable Performance of high Q-factor BaxSr1-xTiO3 Film Bulk Acoustic Wave Resonators

Andrei Vorobiev, Spartak Gevorgian,
15th European Microwave Week - Space for Microwaves Conference Proceedings, p. 1-3
Conference paper - peer reviewed
2012

Intrinsically tunable 0.67 BiFeO3-0.33 BaTiO3 thin film bulk acoustic wave resonators

Andrei Vorobiev, Spartak Gevorgian, Norayr Martirosyan et al
Applied Physics Letters. Vol. 101 (23), p. 232903-232903-5
Scientific journal article - peer reviewed
2012

Microwave characterization of intrinsically tunable FBARs

Andrei Vorobiev, Spartak Gevorgian,
2012 IEEE MTT-S International Microwave Symposium, IMS 2012, Montreal, 17-22 June 2012
Conference paper - peer reviewed
2012

Tunable FBARs: Intrinsic vs. extrinsic tunability

Spartak Gevorgian, Andrei Vorobiev,
2012 IEEE MTT-S International Microwave Symposium, IMS 2012, Montreal, 17-22 June 2012
Conference paper - peer reviewed
2012

Adhesion layer-bottom electrode interaction during BaxSr1−xTiO3 growth as a limiting factor for device performance

Markus Löffler, Andrei Vorobiev, Lunjie Zeng et al
Journal of Applied Physics. Vol. 111 (12), p. Art. no. 124514
Scientific journal article - peer reviewed
2012

ADS Based 1D Model of Solidly Mounted FBARs Including Longitudinal and Shear Waves

Spartak Gevorgian, Andrei Vorobiev,
Integrated Ferroelectrics. Vol. 134, p. 75-80
Scientific journal article - peer reviewed
2012

Microwave Response of BiFeO3 Films in Parallel-Plate Capacitors

Andrei Vorobiev, Taimur Ahmed, Spartak Gevorgian et al
Integrated Ferroelectrics. Vol. 134, p. 111-117
Scientific journal article - peer reviewed
2012

Growth temperature dependent dielectric properties of BiFeO3 thin films deposited on silica glass substrates

Taimur Ahmed, Andrei Vorobiev, Spartak Gevorgian et al
Thin Solid Films. Vol. 520 (13), p. 4470-4474
Scientific journal article - peer reviewed
2011

Large area photo detector

Anatoli Deleniv, Spartak Gevorgian, Arne Alping et al
Patent application
2011

Capacitance arrangement and method relating thereto

Spartak Gevorgian, Anatoli Deleniv, Thomas Lewin et al
Patent
2011

Method to increase the tuneability of varactor

Spartak Gevorgian, Harald Jacobsson, Anatoli Deleniv et al
Patent
2011

Tunable arrangements

Spartak Gevorgian, Anders Derneryd,
Patent
2011

Model of ferroelectric FBARs including longitudinal and shear waves

Spartak Gevorgian, Andrei Vorobiev,
International Symposium on Integrated Functionalities, July 31-August 4, 2011, Cambridge, England
Conference poster
2011

High Q-factor Ba0.25Sr0.75TiO3 thin film bulk acoustic wave resonators: growth conditions and correlations with microstructure

Andrei Vorobiev, Spartak Gevorgian, Markus Löffler et al
International Symposium on Integrated Functionalities, July 31-August 4, 2011, Cambridge, England
Conference poster
2011

Microwave response of BiFeO3 films in parallel-plate capacitors

Andrei Vorobiev, Taimur Ahmed, Spartak Gevorgian et al
International Symposium on Integrated Functionalities, July 31-August 4, 2011, Cambridge, England
Conference paper - peer reviewed
2011

Microwave losses in ferroelectric varactors

Andrei Vorobiev, Spartak Gevorgian,
European Meeting on Ferroelectricity, Bordeaux, June 26 – July 2, 2011
Conference paper - peer reviewed
2011

Tunable bulk acoustic wave resonators based on Ba0.25Sr0.75TiO3 thin films and a HfO2/SiO2 Bragg reflector

John Berge, Spartak Gevorgian,
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. Vol. 58 (12), p. 2768-2771
Scientific journal article - peer reviewed
2011

Dielectric model of point charge defects in insulating paraelectric perovskites

V. Buniatian, N. Martirosyan, Andrei Vorobiev et al
Journal of Applied Physics. Vol. 110 (9)
Scientific journal article - peer reviewed
2011

Correlations between microstructure and Q-factor of tunable thin film bulk acoustic wave resonators

Andrei Vorobiev, Spartak Gevorgian, Markus Löffler et al
Journal of Applied Physics. Vol. 110 (5)
Scientific journal article - peer reviewed
2011

Effect of interface roughness on acoustic loss in tunable thin film bulk acoustic wave resonators

Andrei Vorobiev, John Berge, Spartak Gevorgian et al
Journal of Applied Physics. Vol. 110 (2)
Scientific journal article - peer reviewed
2010

Ferroelectric lens

Ola Tageman, Spartak Gevorgian, Anatoli Deleniv et al
Patent
2010

Varactor device with reduced temperature dependence

Spartak Gevorgian, Harald Jacobsson, Thomas Lewin et al
Patent
2010

Ferroelectric varactors suitable for capacitive shunt switching

Guru Subramanyam, Andrei Vorobiev, Spartak Gevorgian et al
Patent
2010

Tuneable ferroelectric delay line having mirror image conductors

Dan Kuylenstierna, Harald Jacobsson, Thomas Lewin et al
Patent
2010

Design considerations for tunable bulk acoustic wave resonators based on paraelectric phase BaxSr1-xTiO3 thin films

John Berge, Andrei Vorobiev, Spartak Gevorgian et al
19th International Symposium on the Applications of Ferroelectrics
Conference poster
2010

Switchable/Tunable FBARs: Current status and potential

Spartak Gevorgian, Andrei Vorobiev,
MEMSWAVE 2010, June 28-30, Otranto, Italy
Conference paper - peer reviewed
2010

Ferroelectrics in passive scanning antennas

Spartak Gevorgian, Andrei Vorobiev,
EuRAD 2010 Workshop: “Passive Electronically Scanned Arrays and Associated RF Technologies”
Conference paper - peer reviewed
2010

Tunable microwave arrangement (surface mounted resonator)

Spartak Gevorgian, A. Deleniv, T Lewin et al
Patent application
2010

The effect of Bragg reflectors on the electromechanical performance of parallel-plate ferroelectric capacitors

John Berge, Martin Norling, Andrei Vorobiev et al
IOP Conference Series: Materials Science and Engineering - Fundamentals and Technology of Multifunctional Oxide Thin Films (Symposium G, EMRS 2009 Spring Meeting) 8–12 June 2009, Strasbourg, France. Vol. 8 (1), p. 012011
Conference paper - peer reviewed
2010

Growth and dielectric characterisation of large grain BiFeO3 thin films on amorphous SiO2 substrates

Andrei Vorobiev, Norayr Martirosyan, Sten G. Eriksson et al
IOP Conference Series: Materials Science and Engineering - Fundamentals and Technology of Multifunctional Oxide Thin Films (Symposium G, EMRS 2009 Spring Meeting) 8–12 June 2009, Strasbourg, France. Vol. 8 (1), p. 012001
Conference paper - peer reviewed
2010

Improved performance of tunable BaxSr1-xTiO3 TFBARs

Andrei Vorobiev, Spartak Gevorgian,
Elrctroceramics XII, Trondheim, Norway 13-16 June 2010
Conference paper - peer reviewed
2010

Evaluation of tunable FBARs with improved performance

Andrei Vorobiev, Spartak Gevorgian,
MEMSWAVE 2010, Otranto, Italy, June 28-29-30
Conference paper - peer reviewed
2010

Impact of the electrodes on the tunability of paraelectric BST film based FBARs

Spartak Gevorgian, Andrei Vorobiev,
13th European Microwave Week 2010, EuMW2010: Connecting the World - 40th European Microwave Conference, EuMC 2010; Paris; 28 September 2010 through 30 September 2010, p. 1210-1213
Conference paper - peer reviewed
2010

Tunable BaxSr1-xTiO3 FBARs based on SiO2/W Bragg reflectors

Andrei Vorobiev, Spartak Gevorgian,
IEEE MTT-S International Microwave Symposium Digest; MTT 2010; Anaheim, CA; 23 May 2010 through 28 May 2010, p. 1444-1447
Conference paper - non peer reviewed
2010

A highly integrated heterogeneous micro- and mm-wave platform

Pierre Franck Alleaume, Lars Aspemyr, Spartak Gevorgian et al
IEEE MTT-S International Microwave Symposium Digest ; 2010 IEEE MTT-S International Microwave Symposium, MTT 2010; Anaheim, CA; 23 May 2010 through 28 May 2010, p. 461-464
Conference paper - non peer reviewed
2010

Microwave and thz applications of ferroelectrics and multiferroics

Spartak Gevorgian, Andrei Vorobiev,
2010 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves, MSMW'2010
Conference paper - non peer reviewed
2010

Layout Optimization of Small-Size Ferroelectric Parallel-Plate Varactors

Martin Norling, Dan Kuylenstierna, Andrei Vorobiev et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 58 (6), p. 1475-1484
Scientific journal article - peer reviewed
2010

Tunable thin film bulk acoustic wave resonators with improved Q-factor

Andrei Vorobiev, Spartak Gevorgian,
Applied Physics Letters. Vol. 96 (21), p. Article Number: 212904
Scientific journal article - peer reviewed
2010

pH-sensitive properties of barium strontium titanate (BST) thin films prepared by pulsed laser deposition technique

V. V. Buniatyan, M. H. Abouzar, N. W. Martirosyan et al
Physica Status Solidi a-Applications and Materials Science. Vol. 207 (4), p. 824-830
Scientific journal article - peer reviewed
2010

Silicon substrate integration of BST based tunable TFBARs using all-dielectric SiO2/AlN Bragg reflectors

Andrei Vorobiev, John Berge, Martin Norling et al
2010 10th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2010 - Digest of Papers, p. 41-44
Conference paper - peer reviewed
2009

Ferroelectrics in Microwave Devices, Circuits and Systems: Physics, Modeling, Fabrication and Measurements

Spartak Gevorgian, Andrei Vorobiev, Anatoli Deleniv et al
Monograph, book
2009

Tuneable antenna arrangement

Spartak Gevorgian,
Patent application
2009

Tuneable resonator

Spartak Gevorgian, Thomas Lewin, Harald Jacobsson et al
Patent
2009

Varactor Device with Reduced Temperature Dependence.

Spartak Gevorgian, Harald Jacobsson, Thomas Lewin et al
Patent application
2009

Ferroelectric lens

Vladimir Sherman, Pierre Filhol, Spartak Gevorgian et al
Patent application
2009

CAD oriented frequency, temperature, and DC bias dependent small-signal, scalable circuit model of parallel-plate paraelectric varactors

Spartak Gevorgian, Anatoli Deleniv, Andrei Vorobiev et al
International Journal of RF and Microwave Computer-Aided Engineering. Vol. 19 (2), p. 243--257
Scientific journal article - peer reviewed
2009

A voltage controlled switching device

Spartak Gevorgian, T Lewin, Andrei Vorobiev et al
Patent application
2009

Tuneable microwave arrangements

Spartak Gevorgian, T Lewin, Dan Kuylenstierna et al
Patent
2009

Agile microwave devices

Spartak Gevorgian,
IEEE Microwave Magazine. Vol. 10 (5), p. 93-98
Scientific journal article - peer reviewed
2009

Capacitive field-effect pH sensor based on an electrolyte-ferroelectric-insulator-semiconductor structure

V Buniatyan, N Martirosyan, Maryam Abouzar et al
SENSOR+TEST Conference 2009. Nurnberg, Germany 26.-28.2.2009
Conference paper - peer reviewed
2009

Parameter extraction for tunable TFBARs based on BaxSr1-xTiO3

Martin Norling, John Berge, Spartak Gevorgian et al
IEEE IMS’2009 Dig., 2009, p. p101-104
Conference paper - peer reviewed
2009

Agile Microwave Dielectrics: Are there Other Alternatives to BaxSr1-xTiO3

Spartak Gevorgian, Andrei Vorobiev,
Proc. Workshop Tunable RF-Components and Modules for Wireless Communication: Materials and Packaging, WFMO2 (EuMC/EuWiT), EuMC2009, Rome 2009
Conference paper - peer reviewed
2009

Composition dependent tunable microwave properties of thin BaxSr1-xTiO3 films

Andrei Vorobiev, Spartak Gevorgian,
E-MRS 2009 Symposium G
Conference paper - peer reviewed
2009

Agile Ferroelectric Components in EC Project NANOSTAR

Spartak Gevorgian,
Proc. Workshop WMA Tunable RF-Components and Modules for Wireless Communication Systems, IMS'2009
Conference paper - peer reviewed
2009

The potential of multiferroics for GHz and THz applications

Spartak Gevorgian, Andrei Vorobiev,
2009 pacific Rim electroceramics conference
Conference paper - peer reviewed
2009

Modeling of Conductor Losses in Capacitors with Rectangular and Circular Plates

Anatoli Deleniv, Spartak Gevorgian,
International Journal of RF and Microwave Computer-Aided Engineering. Vol. 19 (2), p. 170-176
Scientific journal article - peer reviewed
2008

Delay locked loop with precision controlled delay

Harald Jacobsson, Spartak Gevorgian, Thomas Lewin et al
Patent
2008

Oscillator circuit with tuneable signal delay means

Harald Jacobsson, Spartak Gevorgian, Thomas Lewin et al
Patent
2008

Tunable Resonator (FBAR)

Spartak Gevorgian, T Lewin, Harald Jacobsson et al
Patent application
2008

On-Wafer characterization of varactors using resonating microprobes

Anatoli Deleniv, Andrei Vorobiev, Spartak Gevorgian et al
IEEE trans on microwave theory and techniques. Vol. 56 (5), p. 1105
Scientific journal article - peer reviewed
2008

Comparative study of microstructure and microwave dielectric response of BaxSr1-xTiO3 films grown by pulsed laser deposition and magnetron sputtering

Andrei Vorobiev, John Berge, Spartak Gevorgian et al
Electroceramics XI, 31 August - 3 September 2008, Manchester, UK
Conference paper - peer reviewed
2008

Development of processes for heterogeneous integration of ferroelectric films and devices in microwave systems

Andrei Vorobiev, Spartak Gevorgian,
Electroceramics XI, 31 August - 3 September 2008, Manchester, UK
Conference paper - peer reviewed
2008

Left-Handed Media Using. Dielectric Ring Resonators

Anatoli Deleniv, Spartak Gevorgian,
Proc EuMC2008
Conference paper - peer reviewed
2008

Self-Propagating High-Temperature Synthesis (SHS) of Fe doped YMnO3 and BaTiO3

N Martirosyan, Spartak Gevorgian, V Buniatyan et al
Abstracts Electroceramics 2008
Conference paper - peer reviewed
2008

Tunable technologies for agile microwave systems

Spartak Gevorgian,
Workshop on Advances in Reconfigurable Microwave Technologies for Wireless Communication and Radar Sensing at IMS’2008
Conference paper - peer reviewed
2008

Room temperature dynamic life time measurements of ferroelectric varactors

Spartak Gevorgian, Andrei Vorobiev, Samira Mousavi Nik et al
ISIF'2008
Conference paper - peer reviewed
2008

Tunable Technologies

Spartak Gevorgian,
2nd Metamaterial Congress
Conference paper - peer reviewed
2008

CAD oriented frequency, temperature, and DC bias dependent small-signal, scalable circuit model of parallel-plate paraelectric varactors

Spartak Gevorgian, Anatoli Deleniv, Andrei Vorobiev et al
International Journal of RF and Microwave Computer-Aided Engineering
Scientific journal article - peer reviewed
2008

Modelling of Conductor Losses in Capacitors with Rectangular and Circular Plates

Anatoli Deleniv, Spartak Gevorgian,
International Journal of RF and Microwave Computer-Aided Engineering
Scientific journal article - peer reviewed
2008

Oscillators based on monolithically integrated AlN TFBARs

Martin Norling, Johannes Enlund, Ilia Katardjiev et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 56 (12), p. 3209-3216
Scientific journal article - peer reviewed
2008

A 2 GHz oscillator using a monolithically integrated AlN TFBAR

Martin Norling, Johannes Enlund, Ilia Katardjiev et al
IEEE MTT-S International Microwave Symposium Digest. Vol. 1 (1), p. 843-846
Conference paper - peer reviewed
2008

Field and temperature dependent parameters of the dc field induced resonances in BaxSr1-xTiO3-based tunable thin film bulk acoustic resonators

John Berge, Martin Norling, Andrei Vorobiev et al
Journal of Applied Physics. Vol. 103, p. 064508
Scientific journal article - peer reviewed
2007

Ferroelectric devices and method relating thereto

Spartak Gevorgian, E. Wikborg,
Patent
2007

Component for electromagnetic waves and a method for manufacturing the same

Leif Bergstedt, Spartak Gevorgian, Marika Gustafsson et al
Patent
2007

Ferroelectric varactors suitable for capacitive shunt switching and wireless sensing

Guru Subramanyam, Andrei Vorobiev, Spartak Gevorgian et al
Patent application
2007

Oscillator circuit with tuneable signal delay means

Harald Jacobsson, Spartak Gevorgian, Thomas Lewin et al
Patent application
2007

Delay locked loop with precision contolled delay

Harald Jacobsson, Spartak Gevorgian, Thomas Lewin et al
Patent application
2007

Capacitor

Spartak Gevorgian, Thomas Lewin, Herbert Zirath et al
Patent application
2007

Tunable Arrangements

Spartak Gevorgian, Anders Derneryd,
Patent application
2007

Tunable Microwave Arrangements

Spartak Gevorgian, Lewin Thomas, Dan Kuylenstierna et al
Patent application
2007

Thin film Ba0.25Sr0.75TiO3 voltage tunable capacitors on fused silica substrates for applications in microwave microelectronics

Andrei Vorobiev, John Berge, Spartak Gevorgian et al
Thin Solid Films. Vol. 515 (16), p. 6606-6610
Scientific journal article - peer reviewed
2007

The effect of growth temperature on the nanostructure and dielectric response of BaTiO3 ferroelectric films

John Berge, Andrei Vorobiev, Spartak Gevorgian et al
Thin Solid Films. Vol. 515 (16), p. 6302-6308
Scientific journal article - peer reviewed
2007

Tunable Solidly Mounted Thin Film Bulk Acoustic Resonators Based on BaxSr1-xTiO3 Films

John Berge, Andrei Vorobiev, William Steichen et al
Microwave and Wireless Components Letters, IEEE. Vol. 17 (9), p. 655-657
Scientific journal article - peer reviewed
2007

Performance of Coplanar Waveguides on Surface Passivated Highly Resistive Silicon Covered by Ferroelectric Thin Film

Dan Kuylenstierna, Martin Norling, Andrei Vorobiev et al
IEEE MTT-S International Microwave Symposium Digest, Honolulu, Hawaii , p. 2055 - 2058
Conference paper - peer reviewed
2007

Silicon Substrate Integrated Ferromagnetic Nanowires for Microwave

Anatoli Deleniv, Vladimir Drakinskiy, Paul Evans et al
37th European Microwave Conference, EUMC; Munich; Germany; 9 October 2007 through 12 October 2007. Vol. 2, p. 1310-1313
Conference paper - peer reviewed
2007

Design of the Compact Band-Pass Filter Utilizing Dielectric Loaded

Anatoli Deleniv, Spartak Gevorgian,
37th European Microwave Conference, EUMC; Munich; Germany; 9 October 2007 through 12 October 2007. Vol. 2, p. 886-889
Conference paper - peer reviewed
2007

Resonance technique for accurate on-wafer characterization of ferroelectric varactors

Anatoli Deleniv, Spartak Gevorgian, Vladimir Sherman et al
IEEE MTT-S International Microwave Symposium Digest. Vol. 3, p. 2063-2066
Conference paper - peer reviewed
2007

Experimental characterization of the 3rd order nonlinearities in thin film parallel-plate ferroelectric varactors

Anatoli Deleniv, Pär Rundqvist, Andrei Vorobiev et al
IEEE MTT-S International Microwave Symposium Digest. Vol. 2, p. 683-686
Conference paper - peer reviewed
2007

Comparison of high-resistivity silicon surface passivation methods

Martin Norling, Dan Kuylenstierna, Andrei Vorobiev et al
EuMIC 2007 Proceedings, p. 215-218
Conference paper - peer reviewed
2007

A low-noise K-band VCO based on room-temperature ferroelectric varactors

Martin Norling, Andrei Vorobiev, Harald Jacobsson et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 55 (2), p. 361-369
Scientific journal article - peer reviewed
2006

A detector for detecting electromagnetic radiation

Leif Bergstedt, Spartak Gevorgian,
Patent application
2006

Tunable ferroelectric resonator arrangement

Spartak Gevorgian, Anatoli Deleniv, Orest Vendik et al
Patent
2006

Ferroelectric devices and method relating thereto.

Spartak Gevorgian, E. Wikborg,
Patent
2006

Ferroelectric devices and method relating thereto

Spartak Gevorgian, E. Wikborg,
Patent application
2006

Ferroelectric thin-film based two-dimensional electromagnetic bandgap structures

U. Khan, G. Subramanyam, Spartak Gevorgian et al
Integrated Ferroelectrics. Vol. 86 (1), p. 67-76
Scientific journal article - peer reviewed
2006

Microwave performance of varactors based on nanostructured BSTO films

Andrei Vorobiev, John Berge, Spartak Gevorgian et al
WS7 (EuMC-2006) Nanostructure Ferroelectric Films for Tuneable Microwave and Related Components, G-Mex/MICC Exhibition & International Conference Centre, Manchester UK
Conference paper - peer reviewed
2006

Electromechanical modelling and reduction of the electroacoustic losses in parallel-plate ferroelectric varactors

Spartak Gevorgian, Andrei Vorobiev, John Berge et al
EuMC, Manchester, UK, 10-15 September, 2006.
Conference paper - peer reviewed
2006

Broadband microprobe characterization of the ferroelectric films and varactors

Andrei Vorobiev, Dan Kuylenstierna, Pär Rundqvist et al
36th European Microwave Conference, EuMC 2006; Manchester; United Kingdom; 10 September 2006 through 12 September 2006, p. 843-846
Conference paper - peer reviewed
2006

Thin film Ba0.25Sr0.75TiO3 varactors on Au bottom electrode for microwave applications

Andrei Vorobiev, John Berge, Spartak Gevorgian et al
EuMC, Manchester, UK, 10-15 September, 2006.
Conference paper - peer reviewed
2006

Thin film Ba0.25Sr0.75TiO3 voltage tuneable capacitors on fused silica substrates for applications in microwave microelectronics

Andrei Vorobiev, John Berge, Spartak Gevorgian et al
E-MRS IUMRS ICEM 2006, May 29 to June 2. Symposium J: Synthesis, Processing, and Characterization of Nanoscale Functional Oxide Films Acropolis Congress Centre, Nice, France.
Conference paper - peer reviewed
2006

The effect of growth temperature on the nanostructure and dielectric response of Ba0.75Sr0.25TiO3 ferroelectric films

John Berge, Andrei Vorobiev, Spartak Gevorgian et al
E-MRS IUMRS ICEM 2006, May 29 to June 2. Symposium J: Synthesis, Processing, and Characterization of Nanoscale Functional Oxide Films. Acropolis Congress Center, Nice, France.
Conference paper - peer reviewed
2006

Microwave performance of thin film ferroelectric varactors in the wide temperature range

Andrei Vorobiev, Spartak Gevorgian,
Electroceramics X, International Conference on Electroceramics, Toledo, Spain, 18-22 June, 2006.
Conference paper - peer reviewed
2006

The effect of interfacial transition layer on performance of thin film ferroelectric capacitors

Andrei Vorobiev, John Berge, Spartak Gevorgian et al
Electroceramics X, International Conference on Electroceramics, Toledo, Spain, 18-22 June, 2006
Conference paper - peer reviewed
2006

The Potential of Thin Film Ferroelectric Varactors for Applications in Large Microwave Arrays

Spartak Gevorgian, Andrei Vorobiev, Dan Kuylenstierna et al
IEEE Radio and Wireless Symposium (RWS 2006), San Diego, 17-19 January 2006.
Conference paper - peer reviewed
2006

Ferroelectrics: Material Properties, Processing, and Microwave Applications

Spartak Gevorgian,
Norwegian IEEE MTT/AP chapter Seminar, SINTEF, Trondheim, March, 24, 2006
Conference paper - peer reviewed
2006

Performance Problems: Do they Hinder the Wide Scale Applications of the Ferroelectrically Tuneable Microwave Devices

Spartak Gevorgian, Andrei Vorobiev, John Berge et al
EuMC2006 Workshop on Nanostructured ferroelectric films for tuneable microwave and related applications
Conference paper - peer reviewed
2006

Parallel-Plate Ferroelectric Varactors in Tunable Microwave Devices

Spartak Gevorgian,
IMS2006 Workshop on Frequency-Agile Radio: Systems and Technologies
Conference paper - peer reviewed
2006

Tunable paraelectric films for millimeter wave & Terahertz applications

Spartak Gevorgian,
Work-shop on Tunable Ferroelectrics, February 1– 4, 2006, Chateau-d’Oex, Switzerland
Conference paper - non peer reviewed
2006

The effect of SiO2, Pt and Pt/Au templates on microstructure and permittivity of Ba0:25Sr0:75TiO3 films

Pär Rundqvist, Andrei Vorobiev, Spartak Gevorgian et al
J. Appl. Phys. Vol. 100, p. 114116
Scientific journal article - peer reviewed
2006

Large Signal Circuit Model of Parallel-Plate Ferroelectric Varactors

Pär Rundqvist, Andrei Vorobiev, Erik L. Kollberg et al
J. Appl. Phys.. Vol. 100, p. 074101-1
Scientific journal article - peer reviewed
2006

DC field and temperature dependent acoustic resonances in parallel-plate capacitors based on SrTiO3 and Ba0.25Sr0.75TiO3 films. Experiment and modeling

Spartak Gevorgian, Andrei Vorobiev,
J. Appl. Phys. . Vol. 99, p. 124112-1
Scientific journal article - peer reviewed
2006

Ferroelectric thin films: Review of materials, properties, and applications

N. Setter, D. Damjanovic, L. Eng et al
J. Appl. Phys.. Vol. 100 (5), p. 051606-1-46
Scientific journal article - peer reviewed
2006

X-band left handed phase shifter using thin film Ba0.25Sr0.75TiO3 ferroelectric varactors

Dan Kuylenstierna, Eric Ash, Andrei Vorobiev et al
Conference Proceedings. 36th European Microwave Conference, 10-15 Sep. 2006, Manchester, UK, 2006, p. 847--50
Conference paper - peer reviewed
2006

Characterization Accuracy of High-Q Reactors Using Broadband Reflection/Transmission Measurement Techniques

Anatoli Deleniv, Spartak Gevorgian,
Proceedings of EUMC 2006, 10-15 Sept. 2006, Manchester, UK , p. 975-979
Conference paper - peer reviewed
2006

A 2 GHz oscillator based on a solidly mounted thin film bulk acoustic wave resonator

Martin Norling, Johannes Enlund, Spartak Gevorgian et al
IEEE MTT-S International Microwave Symposium Digest. Vol. 1 (1), p. 1813-1816
Conference paper - peer reviewed
2006

Circuit model of a SiGe HBT flip-chip mounted onto a silicon carrier

Martin Norling, Spartak Gevorgian,
IEEE Radio Frequency Integrated Circuits Symposium, p. 377-380
Conference paper - peer reviewed
2006

Composite Right/Left Handed Transmission Line Phase Shifter Using Ferroelectric Varactors

Dan Kuylenstierna, Andrei Vorobiev, Peter Linnér et al
Microwave and Wireless Components Letters. Vol. 16 (4), p. 167-169
Scientific journal article - peer reviewed
2006

40 GHz Lumped Element Tunable Bandpass Filters with Transmission Zeros Based on Thin Ba0.25Sr0.75TiO3 (BST) Film Varactors

Dan Kuylenstierna, Andrei Vorobiev, Spartak Gevorgian et al
IEEE SiRF06
Conference paper - peer reviewed
2006

Ba0.25Sr0.75TiO3 thin film varactors on SrRuO3 bottom electrode

Khaled Khamchane, Andrei Vorobiev, Tord Claeson et al
J. Appl. Phys. Vol. 99, p. 034103
Scientific journal article - peer reviewed
2005

Component for electromagnetic waves and a method for manufacturing the same

Leif Bergstedt, Spartak Gevorgian, Marica Gustafsson et al
Patent application
2005

Electronically scanning beamformers based on ferroelectric technology

Spartak Gevorgian, Ola Tageman, A. Derneryd et al
Frequenz. Vol. 59 (1-2), p. 40-48
Scientific journal article - peer reviewed
2005

Techniques for microwave measurements of ferroelectric thin films and their associated error and limitations

P. K. Petrov, N. McN Alford, Spartak Gevorgian et al
Measurement Science and Technology. Vol. 16 (2), p. 583-589
Scientific journal article - peer reviewed
2005

MMICs for Micro and Millimeterwave applications in a 90 nm CMOS technology

Herbert Zirath, Mattias Ferndahl, Bahar M. Motlagh et al
Microwave Workshops and Exhibition, MWE 2005. Vol. 2005, p. WS17-02
Conference paper - peer reviewed
2005

Analysis of the influence of SrRuO3 buffer layer on ferroelectric varactors for multiplier applications

Pär Rundqvist, Andrei Vorobiev, Spartak Gevorgian et al
Gigahertz Uppsala
Conference paper - peer reviewed
2005

Microwave Loss Mechanisms in Ba0.25Sr0.75TiO3 Films

Andrei Vorobiev, Pär Rundqvist, Spartak Gevorgian et al
Materials Science and Engineering B. Vol. 118, p. 214-218
Scientific journal article - peer reviewed
2005

Microwave performance of thin film ferroelectric varactors in the wide temperature range

Andrei Vorobiev, Spartak Gevorgian,
GigaHertz 2005, Uppsala, Sweden
Conference paper - peer reviewed
2005

Composite Right/Left Handed Transmission LinePhase Shifter using Ferroelectric Varactors

Dan Kuylenstierna, Andrei Vorobiev, Spartak Gevorgian et al
Proc. of GigaHertz 2005
Conference paper - non peer reviewed
2005

Ultrawide-band tunable true-time delay lines using ferroelectric varactors

Dan Kuylenstierna, Andrei Vorobiev, Peter Linnér et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 53 (6, pt.2), p. 2164-70
Scientific journal article - peer reviewed
2005

High-Q Fringing-Field-Enhanced capacitors(FFE) for deep submicron Silicon-MMICs

Bahar M. Motlagh, Spartak Gevorgian, Herbert Zirath et al
Proceedings of the Europian Microwave Association. Vol. 01 (01), p. 25-27
Scientific journal article - peer reviewed
2005

A balanced 23 GHz voltage-controlled oscillator based on ferroelectric varactors

Martin Norling, Andrei Vorobiev, Harald Jacobsson et al
Gigahertz 2005, p. 279-282
Conference paper - peer reviewed
2005

Analysis of multiplier with a novel symmetric ferroelectric varactor

Pär Rundqvist, Andrei Vorobiev, Erik L. Kollberg et al
Proc. of the 16th International Symposium of Space Terahertz
Scientific journal article - peer reviewed
2005

LTCC compatible ferroelectric phase shifters

Anatoli Deleniv, Spartak Gevorgian, Heli Jantunnen et al
Microwave Symposium Digest, 2005 MTT-S international. Vol. 1, p. 599-602
Scientific journal article - peer reviewed
2005

GaAs varactor tuned filter for low power applications

Anders Eriksson, Anatoli Deleniv, Spartak Gevorgian et al
Microwave Symposium Digest, 2005 MTT-S international, p. 2211-2214
Scientific journal article - peer reviewed
2005

Open resonator technique for measuring multilayered dielectric plates

Anatoli Deleniv, Spartak Gevorgian,
IEEE Transactions on Microwave Theory and Techniques. Vol. 53 (9), p. 2908-2916
Scientific journal article - peer reviewed
2004

Ferroelectric devices and method relating thereto.

Spartak Gevorgian, E. Wikborg,
Patent application
2004

Oscillator

Harald Jacobsson, Spartak Gevorgian, E. Wikborg et al
Patent application
2004

Tunable ferroelectric resonator arrangement

Spartak Gevorgian, Anatoli Deleniv, Orest Vendik et al
Patent application
2004

CMOS MMICs for microwave and millimeter wave applications

Mattias Ferndahl, Herbert Zirath, Bahar M. Motlagh et al
IEEE-MIKON Int. Conf. on Microwaves, Radar and Wireless Communications. Vol. 1, p. 237-248
Conference paper - peer reviewed
2004

Ba 0.25Sr 0.75TiO3 -metal microstructure, surface morphology and interfaces.

Pär Rundqvist, Andrei Vorobiev, Spartak Gevorgian et al
11th International student seminar on Microwave Applications
Conference paper - peer reviewed
2004

Non-destructive microwave characterization of ferroelectric films on conductive substrates

Pär Rundqvist, Andrei Vorobiev, Spartak Gevorgian et al
Integrated Ferroelectrics. Vol. 60, p. 1-19
Scientific journal article - peer reviewed
2004

Ferroelectrically tuneable delay lines

Dan Kuylenstierna, Andrei Vorobiev, Peter Linnér et al
Conference Proceedings. 34th European Microwave Conference, 12-14 Oct. 2004. Vol. vol.1, p. 157-60
Conference paper - peer reviewed
2004

Integration of parallel-plate ferroelectric varactors with BCB-on-silicon microstrip circuits

Dan Kuylenstierna, Andrei Vorobiev, Spartak Gevorgian et al
2004 IEEE MTT-S International Microwave Symposium Digest, 6-11 June 2004. Vol. Vol.3, p. 1907-10
Conference paper - peer reviewed
2004

Silicon substrate integrated ferroelectric microwave components

Spartak Gevorgian, Andrei Vorobiev, Dan Kuylenstierna et al
Integrated Ferroelectrics. Vol. 66, p. 125-38
Scientific journal article - peer reviewed
2004

Microwave loss mechanisms in Ba0.25Sr0.75TiO3$ thin film varactors

Andrei Vorobiev, Pär Rundqvist, Spartak Gevorgian et al
Journal of Applied Physics. Vol. 96 (8), p. 4642-9
Scientific journal article - peer reviewed
2004

Large signal circuit model of parallel-plate ferroelectric

Pär Rundqvist, Andrei Vorobiev, Spartak Gevorgian et al
34th European Microwave Conference; London; United Kingdom; 12 October 2004 through 14 October 2004. Vol. 3, p. 1505-1508
Conference paper - peer reviewed
2003

Arrangement relating to conductor carriers and methods for the manufacture of such carriers.

Leif Bergstedt, Per Ligander, Spartak Gevorgian et al
Patent
2003

Optical electromagnetic wave generator

Spartak Gevorgian, Nils Calander, Mats Karlsson et al
Patent
2003

Multilayer balun transformer structure

Spartak Gevorgian, Chalotta Hedenes, Harald Jacobsson et al
Patent
2003

Electrically tunable device and a method relating thereto

E. Wikborg, Zdravko Ivanov, Peter Petrov et al
Patent
2003

Micro-strip circuit for loss reduction

Omid Aval, Håkan Berg, Spartak Gevorgian et al
Patent
2003

Microwave power dependent properties of ferroelectric varactors.

Pär Rundqvist, Andrei Vorobiev, Spartak Gevorgian et al
Gigahertz Linköping
Conference paper - peer reviewed
2003

Silicon substrate integrated high Q-factor parallel-plate ferroelectric varactors for microwave/millimeterwave applications.

Andrei Vorobiev, Pär Rundqvist, Spartak Gevorgian et al
Gigahertz Linköping
Conference paper - peer reviewed
2003

Silicon substrate integrated high Q-factor parallel-plate ferroelectric varactors for microwave/millimeterwave applications

Andrei Vorobiev, Pär Rundqvist, Spartak Gevorgian et al
Appl. Phys. Lett.. Vol. 83 (15), p. 3144-6
Scientific journal article - peer reviewed
2003

Tunable electromagnetic bandgap structures based on ferroelectric films

Dan Kuylenstierna, Andrei Vorobiev, G. Subramanyam et al
2003 IEEE International Antennas and Propagation Symposium and USNC/CNC/URSI North American Radio Science Meeting, Jun 22-27 2003. Vol. 4, p. 879-882
Conference paper - peer reviewed
2003

Tuneable Electromagnetic Bandgap structures based on Ba/sub 0.25/Sr/sub 0.75/TiO/sub 3/ parallel-plate varactors on silicon Coplanar Waveguides

Dan Kuylenstierna, Andrei Vorobiev, G. Subramanyam et al
33rd European Microwave Conference Proceedings, 7-9 Oct. 2003. Vol. Vol.3, p. 1111-14
Conference paper - peer reviewed
2003

Tunable electromagnetic bandgap performance of coplanar waveguides periodically loaded by ferroelectric varactors

Dan Kuylenstierna, G. Subramanyam, Andrei Vorobiev et al
Microwave and Optical Technology Letters. Vol. 39 (2), p. 81-86
Scientific journal article - peer reviewed
2003

Correlation between microstructure, DC resistivity and magnetoresistance of SrRuO3 films

Khaled Khamchane, Zdravko Ivanov, Robert Gunnarsson et al
Materials Research Society Symposium - Proceedings, . Vol. 751, p. 67-71
Conference paper - peer reviewed
2003

Conduction and microwave loss mechanisms in Ba0.25Sr0.75TiO3 films

Andrei Vorobiev, Pär Rundqvist, Khaled Khamchane et al
Ferroelectric Thin Films XII, (Mater. Res. Soc. Symposium Proceedings). Vol. 784, p. 357
Conference paper - peer reviewed
2003

dc and microwave resistivities of SrRuO_3 films deposited on SrTiO_3

Pär Rundqvist, Andrei Vorobiev, Spartak Gevorgian et al
Journal of Applied Physics, . Vol. 93 (2), p. 1291-7
Scientific journal article - peer reviewed
2002

Parallel plate microwave devices having tapered current interrupting slots

Erik F. Carlsson, Spartak Gevorgian, E. Wikborg et al
Patent
2002

Tunable high Tc superconductive microwave devices

Spartak Gevorgian, Erik L. Kollberg, Orest Venndik et al
Patent
2002

Micro-electromechanical arrangement

Arne Alping, Spartak Gevorgian,
Patent
2002

Arrangement for more even current distribution in a transmission line

Spartak Gevorgian, Leif Bergstedt,
Patent
2002

Arrangement mounted on a printed circuit board and method of producing such an arrangement

Leif Bergstedt, Spartak Gevorgian,
Patent application
2002

Antenna arrangement and a communication arrangement comprising the same

Leif Bergstedt, Spartak Gevorgian, Thomas Lewin et al
Patent application
2002

Multilayer balun transformer structure

Spartak Gevorgian, Charlotta Hedenes, Harald Jacobsson et al
Patent
2002

Low-frequency and microwave performances of laser-ablated epitaxialNa 0.5 K 0.5 NbO 3 films on high-resistivitySiO 2 /Si substrates

Saeed Abadei, Spartak Gevorgian, Alex Grishin et al
Journal of Applied Physics. Vol. 91, p. 2267
Scientific journal article - peer reviewed
2002

The double loop hysteresis in DC dependent dielectric permittivity of SrTiO3

Spartak Gevorgian, Anders Eriksson, Anatoli Deleniv et al
Journal of Applied Physics. Vol. 92, p. 6165-6171
Scientific journal article - peer reviewed
2002

SrTiO3 thin film varactors on Si for microwave applications

Andrei Vorobiev, Pär Rundqvist, Spartak Gevorgian et al
Mat. Res. Soc. . Vol. 748, p. 477
Conference paper - peer reviewed
2002

SrTiO3 thin film varactors on Si for microwave applications

Andrei Vorobiev, Pär Rundqvist, Khaled Khamchane et al
Fall 2002 MRS Symposium Proceedings, Boston, USA
Scientific journal article - peer reviewed
2002

Microwave properties of SrTiO3/SrRuO3/CeO2/YSZ heterostructure on low-resistivity silicon

Andrei Vorobiev, Pär Rundqvist, Spartak Gevorgian et al
MICROWAVE MATERIALS AND THEIR APPLICATIONS 2002 Conference
Conference paper - peer reviewed
2001

High-q tank

Håkan Berg, Spartak Gevorgian, Harald Jacobsson et al
Patent application
2001

Microstrip arrangement

Leif Bergstedt, Spartak Gevorgian,
Patent
2001

Balanced inductor

Spartak Gevorgian, Bertil Hanson,
Patent
2001

Optical electromagnetic wave generator

Spartak Gevorgian, Nils Calander, Mats Karlsson et al
Patent application
2001

Electrically tunable device and a method relating thereto

E. Wikborg, Zdravko Ivanov, Peter Petrov et al
Patent application
2001

Arrangement and method relating to coupling of signals to/from microwave devices

E. Wikborg, Erik F. Carlsson, Spartak Gevorgian et al
Patent
2001

Microwave properties of tunable capacitors basee on magnetron sputtered ferroelectric Na0.5K0.5NbO3 film on low and high resistivity silicon substrates

Saeed Abadei, Spartak Gevorgian, Veronica Kugler et al
Integrated Ferroelectrics. Vol. 39 (1-4), p. 359-366
Scientific journal article - peer reviewed
2001

DC field dependent properties of Na0.5K0.5NbO3/SiO2/Si structures at millimeter-wave frequencies

Saeed Abadei, Spartak Gevorgian, C Cho et al
Applied Physics Letters. Vol. 78 (13), p. 1900 - 1902
Scientific journal article - peer reviewed
2001

Mode chart of electrically thin parallel-plate circular resonators

Anders Eriksson, Peter Linnér, Spartak Gevorgian et al
IEE Proceedings - Microwaves Antennas and Propagation. Vol. 148 (1), p. 51 – 55
Scientific journal article - peer reviewed
2001

DC field induced antiferroelectric phase transition in bulk, single crystal strontium titanate

Spartak Gevorgian, Anders Eriksson, Peter Petrov et al
Integrated Ferroelectrics. Vol. 33 (1-4), p. 323-329
Scientific journal article - peer reviewed
2001

Low frequency characterisation of laser ablation deposited thin Na0.5K0.5NbO3 (NKN) films for microwave application

Saeed Abadei, C Cho, Alex Grishin et al
Integrated Ferroelectrics. Vol. 263 (1), p. 173-179
Scientific journal article - peer reviewed
2001

Strain induced ferroelectrosity in epitaxial SrTiO3 films

Spartak Gevorgian, Peter Petrov, Saeed Abadei et al
Integrated Ferroelectrics. Vol. 33 (1-4), p. 311-321
Scientific journal article - peer reviewed
2001

Tailoring the temperature coefficient of capacitance in ferroelectric varactors

Spartak Gevorgian, Peter Petrov, Zdravko Ivanov et al
Applied Physics Letters. Vol. 79 (12), p. 1861 - 1863
Scientific journal article - peer reviewed
2001

Do we really need ferroelectrics in paraelectric phase only in electrically controlled microwave devices?

Spartak Gevorgian, Erik L. Kollberg,
IEEE transactions on microwave theory and techniques. Vol. 49 (11), p. 2117 - 2124
Scientific journal article - peer reviewed
2001

Analytic approximation for open-end capacitance in symmetric coplanar-strip waveguides

Spartak Gevorgian, Peter Linnér, Erik L. Kollberg et al
Electronics Letters. Vol. 37 (20), p. 1226 – 1228
Scientific journal article - peer reviewed
2000

Antenna arrangement

Leif Bergstedt, Spartak Gevorgian,
Patent
2000

Arrangement and method relating to filtering of signals

Erik F. Carlsson, Spartak Gevorgian, Erik L. Kollberg et al
Patent
2000

X-ray study of SrTiO3 thin films in multilayer structures

Peter Petrov, Zdravko Ivanov, Spartak Gevorgian et al
Materials Science & Engineering: A. Vol. 288 (2), p. 231–234
Scientific journal article - peer reviewed
2000

The effect of longitudinal substrate currents on the losses in silicon substrate coplanar-strip and coplanar waveguides

Håkan Berg, Spartak Gevorgian,
International Journal of RF and Microwave Computer-Aided Engineering. Vol. 10 (5), p. 284–288
Scientific journal article - peer reviewed
2000

Modeling gap discontinuity in coplanar waveguide using quazi-static spectral domain method

Anatoli Deleniv, Irina Vendik, Spartak Gevorgian et al
International Journal of RF and Microwave Computer-Aided Engineering. Vol. 10 (3), p. 150-158
Scientific journal article - peer reviewed
2000

Na0.5K0.5NbO3/SiO2/Si Thin Film Varactor

Coong-Rae Cho, Jung-Hyuk Koh, Alex Grishin et al
Applied Physics Letters. Vol. 76, p. 1761
Scientific journal article - peer reviewed
1999

Electric field dependent microwave losses in KTaO3 single crystal with YBa2CU3O7-x electrodes

Erik F. Carlsson, E. Wikborg, Spartak Gevorgian et al
Ferroelectrics. Letters section. Vol. 25 (5-6), p. 141-152
Scientific journal article - peer reviewed
1999

Effect of YBCO electrodes on the properties of STO based varactors

Peter Petrov, Zdravko Ivanov, Spartak Gevorgian et al
Institute of Physics Conference Series. Vol. 2 (167), p. 105-108
Scientific journal article - non peer reviewed
1999

Conformal mapping of the field and charge distributions in multilayered substrate CPWs

Erik F. Carlsson, Spartak Gevorgian,
IEEE transactions on microwave theory and techniques. Vol. 47 (8), p. 1544 - 1552
Scientific journal article - peer reviewed
1998

Fabrication and investigation of YBa2Cu3O7-delta/Ba0.05Sr0.95TiO3 thin film structures for voltage tunable devices

R Chakalov, Zdravko Ivanov, Yuri Boikov et al
Physica. C, Superconductivity. Vol. 308 (3-4), p. 279-288
Scientific journal article - peer reviewed
1998

Growth and field dependent dielectric properties of epitaxialNa 0.5 K 0.5 NbO 3 thin films

Xin Wang, Ulf Helmersson, Sveinn Olafsson et al
Applied Physics Letters. Vol. 73, p. 927
Scientific journal article - peer reviewed
1998

Surface impedance of silicon substrates and films

Spartak Gevorgian,
International Journal of RF and Microwave Computer-Aided Engineering. Vol. 8 (6), p. 433-440
Scientific journal article - peer reviewed
1998

Tunable microwave devices based on bulk and thin film ferroelectrics

Spartak Gevorgian, Erik Carlsson, E. Wikborg et al
Integrated Ferroelectrics. Vol. 22 (1-4), p. 245-257
Scientific journal article - peer reviewed
1997

HTS/ferroelectric devices for microwave applications

Spartak Gevorgian, Erik F. Carlsson, Staffan Rudner et al
IEEE transactions on applied superconductivity. Vol. 7 (2), p. 2458 - 2461
Scientific journal article - peer reviewed
1997

Effect of enhanced current crowding in a CPW with a thin ferroelectric film

Erik F. Carlsson, Spartak Gevorgian,
Electronics Letters. Vol. 33 (2), p. 145-146
Scientific journal article - peer reviewed
1997

Optically Controlled Semiconductor Coplanar-Strip Waveguide Attenuator/Modulator: Design Considerations

Spartak Gevorgian, Erik L. Kollberg,
Journal on Communications (Hungary). Vol. XLVIII, p. 18-21
Scientific journal article - peer reviewed
1997

Simple and accurate dispersion expression for the effective dielectric constant of coplanar waveguides

Spartak Gevorgian, Torsten Martinsson, Anatoli Deleniv et al
IEE Proceedings - Microwaves Antennas and Propagation. Vol. 144 (2), p. 145-148
Scientific journal article - peer reviewed
1997

Experimental Study of Thin Film HTS/Ferroelectric CPW Phase Shifters for Microwave Applications

Erik F. Carlsson, Peter Petrov, R Chakalov et al
Institute of Physics Conference Series. Vol. 158, p. 339-342
Scientific journal article - peer reviewed
1996

CAD Model of a Gap in a Coplanar Waveguide

Spartak Gevorgian, Anatoli Deleniv, Torsten Martinsson et al
International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering. Vol. 6 (5), p. 369–377
Scientific journal article - peer reviewed
1996

Modelling of thin-film HTS/ferroelectric interdigital capacitors

Spartak Gevorgian, Erik F. Carlsson, Staffan Rudner et al
IEE Proceedings - Microwaves Antennas and Propagation. Vol. 143 (5), p. 397 - 401
Scientific journal article - peer reviewed
1996

CAD models for multilayered substrate interdigital capacitors

Spartak Gevorgian, Torsten Martinsson, Peter Linnér et al
IEEE transactions on microwave theory and techniques. Vol. 44 (6), p. 896 - 904
Scientific journal article - peer reviewed
1996

Lower order modes of YBCO/STO/YBCO circular disk resonators

Spartak Gevorgian, Erik F. Carlsson, Peter Linnér et al
IEEE transactions on microwave theory and techniques. Vol. 44 (10), p. 1738 - 1741
Scientific journal article - peer reviewed
1995

Single-Step Buried Waveguides in Glass by Field Assisted Copper Ion Exchange

Spartak Gevorgian,
Electronics Letters. Vol. 26 (1), p. 38 - 39
Scientific journal article - peer reviewed
1995

Effects of package width on K-band high-temperature superconducting filters

Erik F. Carlsson, Spartak Gevorgian, Peter Linnér et al
Microwave and optical technology letters. Vol. 10 (6), p. 315–317
Scientific journal article - peer reviewed
1995

1 GHz tunable resonator on bulk single crystal SrTiO3 plated with YBa2Cu3O7-x films

Orest Vendik, Erik L. Kollberg, Spartak Gevorgian et al
Electronics Letters. Vol. 31 (8), p. 654 – 656
Scientific journal article - peer reviewed
1995

Fundamental TM Mode of a Superconducting Parallel Plate Waveguide

Spartak Gevorgian, Erik F. Carlsson, E. Wikborg et al
Institute of Physics Conference Series. Vol. 148 (2), p. 1167-1170
Scientific journal article - peer reviewed
1995

Effects of degraded edges in strips of high‐temperature superconducting films at microwave frequencies

Spartak Gevorgian, Erik F. Carlsson, Eva Olsson et al
Applied Physics Letters. Vol. 67, p. 1615
Scientific journal article - peer reviewed
1995

CAD Models for Shielded Multilayered CPW

Spartak Gevorgian, Peter Linnér, Erik L. Kollberg et al
IEEE transactions on microwave theory and techniques. Vol. 43 (4), p. 772-779
Scientific journal article - peer reviewed
1994

Optical Response of a YBCO Coplanar Waveguide Resonator

Erik F. Carlsson, Spartak Gevorgian, Erik L. Kollberg et al
Proc. IEEE Topical Meeting on Optical and Microwave Interactions, p. 195-197
Conference paper - peer reviewed
1994

Critical Limitations in Low-Loss Narrow-Band filter Design

Spartak Gevorgian, Sergay Galchenko, Dimity Kaparkov et al
Microwave Conference, 1994. 24th European . Vol. 1, p. 522 - 527
Conference paper - peer reviewed
1994

Microwave Performance of a HTSC Coplanar-Strip Waveguide

Spartak Gevorgian, Erik L. Kollberg, Orest Vendik et al
Microwave Performance of a HTSC Coplanar-Strip Waveguide. Vol. 1, p. 505 - 510
Conference paper - peer reviewed
1994

Analytical models for shielded multilayered CPW

Spartak Gevorgian, Peter Linnér, Erik L. Kollberg et al
24th European conference, Microwave . Vol. 1, p. 263-267
Conference paper - peer reviewed
1994

Effective Dielectric Permittivity of r-Cut Sapphire Microstrip

Irina Vendik, Orest Vendik, Spartak Gevorgian et al
Microwave Conference, 1994. 24th European . Vol. 1, p. 395 - 400
Conference paper - peer reviewed
1994

Optical Triggering of a Planar p+-p-p+ Device at Microwave Frequencies

Spartak Gevorgian,
Proc. IEEE Topical Meeting on Optical and Microwave Interactions (OMI 94), p. 175-177
Conference paper - peer reviewed
1994

CAD Model for Microstrips on r-cut Sapphire Substrates

Irina Vendik, Orest Vendik, Spartak Gevorgian et al
International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering. Vol. 4 (4), p. 374–383
Scientific journal article - peer reviewed
1994

Short Circuit Photocurrent Controlled Microwave p-i-n Diode Switch

Spartak Gevorgian,
Microwave and optical technology letters. Vol. 7 (12), p. 553-555
Scientific journal article - peer reviewed
1994

Basic characteristics of two layered substrate coplanar waveguides

Spartak Gevorgian,
Electronics Letters. Vol. 30 (15), p. 1236 - 1237
Scientific journal article - peer reviewed
1994

Electrically Controlled HTSC/Ferroelectric Coplanar Waveguide

Spartak Gevorgian, Dimity Kaparkov, Orest Vendik et al
Microwave and optical technology letters. Vol. 141 (6), p. 501 – 503
Scientific journal article - peer reviewed
1992

Design Considerations for an Optically Exited Semiconductor Microstrip Gap at Microwave Frequencies

Spartak Gevorgian,
IEE Proceedings - Optoelectronics. Vol. 139 (2), p. 153 - 157
Scientific journal article - peer reviewed
1991

The Optical Power Distribution and Scattering Losses in Symmetric Channel Waveguide X-Junction

Spartak Gevorgian, Ashot Hovsepian,
Optical and quantum electronics. Vol. 23, p. 649-656
Scientific journal article - peer reviewed
1991

Buried Waveguides in Glass Made by Electrostimulated Ion Exchange

Spartak Gevorgian, G Baghdasarian,
Zurnal Techn. Phys., ZTF, (in Russian). Vol. 61 (1), p. 190-192
Scientific journal article - peer reviewed
1991

Microwave Losses in a Fibre Optical Transmission Line

Spartak Gevorgian,
Electron Technology. Microwaves (in Russian). Vol. 407 (3), p. 41-42
Scientific journal article - peer reviewed
1991

Net Electrical Power Consumption in a Microwave Fiber Optical Transmission Line

Spartak Gevorgian, Ilia Barskii, V Kuznetsov et al
Radioelectronica, Izvestia Vuzov (in Russian). Vol. 3, p. 73-76
Scientific journal article - peer reviewed
1990

Optics Control Microwaves. The Next Step

Spartak Gevorgian,
Microwave Conference, 1990. 20th European . Vol. 2, p. 1603 - 1608
Conference paper - peer reviewed
1990

Asymmetric Coplanar-Strip Transmission Lines for MMIC and Integrated Optic Applications

Spartak Gevorgian, Igor Mironenko,
Electronics Letters. Vol. 26 (22), p. 16 - 1918
Scientific journal article - peer reviewed
1990

Microwave Conductivity of Optically Excited Gap in a Semiconductor Microstrip

Spartak Gevorgian,
Electronics Letters. Vol. 26 (22), p. 1921 - 1922
Scientific journal article - peer reviewed
1990

Nonlinear absorption in the Glasses Doped by CdS

Spartak Gevorgian, V Nikonorov,
Pisma v JTF (in Russian). Vol. 16 (3), p. 32-35
Scientific journal article - peer reviewed
1990

Planar Optical Waveguide in K8 Glass Made by Electromigration from Copper Films

Spartak Gevorgian,
Physics and Chemistry of Glass (in Russian). Vol. 16 (3), p. 489-491
Scientific journal article - peer reviewed
1990

Fibre Optical Phased Arrays

Irina Vendik, Spartak Gevorgian, Georgy khiza et al
Zarubeznaya Radioelektronika (USSR), p. 86-93
Scientific journal article - peer reviewed
1989

Float Glass: an Industrial Substrate for Integrated Optics

Spartak Gevorgian, Marine Zabunyan, G Vrtanesyan et al
Optical and Quantum Electronics. Vol. 21, p. 307-319
Scientific journal article - peer reviewed
1989

Integrated Optical X-Junctions

Spartak Gevorgian, Ashot Hovsepyan, Rafael Kazaryan et al
Zarubeznaya Radioelektronika (Review article, in Russian) (3), p. 63-70
Scientific journal article - peer reviewed
1988

Local Parameter Measurements of Polymer Films

Spartak Gevorgian, Aram Petrosyan, Marine Zabunyan et al
Vysokomoleculyarnie Soedineniya /Russian. Vol. T.(A) XXX, p. 1556-1558
Scientific journal article - peer reviewed
1988

Coupling Among Waveguides of Small Spacing

Spartak Gevorgian, Ashot Hovsepian,
Electronics Letters. Vol. 24 (13), p. 814 - 815
Scientific journal article - peer reviewed
1987

Optically Controlled Microwave Semiconductor Devices

Irina Vendik, Spartak Gevorgian, Georgy khiza et al
Zarubeznaya Radioelektronika (Review article, in Russian), p. 10-22
Scientific journal article - peer reviewed
1980

Reverse Biased Equivalent Microwave Parameters of p+-p-n+ (p+-n-n+) Structures

Irina Vendik, Spartak Gevorgian, Georgy khiza et al
Journ. Electron Technology. Microwaves, (in Russian) (10), p. 14-27
Scientific journal article - peer reviewed