Andrei Vorobiev

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

Andrei Vorobiev received the M.Sc. degree in physics of semiconductors and dielectrics from Gorky State University, Gorky, Russia, in 1986 and Ph.D. degree in physics and mathematics from Institute for Physics of Microstructures of Russian Academy of Sciences (IPM RAS), Nizhny Novgorod, Russia, in 2000. Since 1986 he has been an engineer and then the head of Laboratory of Microelectronics at Design Office of Measuring Instruments, Gorky, Russia with research interests in area of development of hybrid film microwave integrated circuits. In 1991 he joined the Technology Division of IPM RAS as senior research associate with research interests in the area of high temperature superconductor films and multi-layer structures. Since 2001, he is at Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg, Sweden, at first as a Postdoctoral Fellow and then as a Researcher. In 2008 he received title of docent (broadly equivalent to Associate Professor) in physical electronics awarded at Chalmers University of Technology. He has authored or coauthored over 100 papers and conference presentations. His research interests are in the area of development and application of emerging functional materials and phenomena in microwave components and devices based on multiferroic and ferroelectric thin films including development of materials, thin film and microtechnology fabrication/processing steps and experimental investigation.

Source: chalmers.se

Projects

2015–2017

High mobility graphene transistors with ferroelectrically induced bandgap

Andrei Vorobiev Terahertz and Millimetre Wave Laboratory
Swedish Research Council (VR)

2014–2019

Carbon Based High Speed 3D GaN Electronics System

Johan Liu Electronics Material and Systems Laboratory
Per Hyldgaard Electronics Material and Systems Laboratory
Jan Stake Terahertz and Millimetre Wave Laboratory
Andrei Vorobiev Terahertz and Millimetre Wave Laboratory
Swedish Foundation for Strategic Research (SSF)

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)

2015–2016

RF energy harvesting for M2M communication

Jan Stake Terahertz and Millimetre Wave Laboratory
Andrei Vorobiev Terahertz and Millimetre Wave Laboratory
VINNOVA

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

Publications

2017

Effect of oxide traps on channel transport characteristics in graphene field effect transistors

Marlene Bonmann, Andrei Vorobiev, Jan Stake et al
Journal of Vacuum Science & Technology B. Vol. 35 (1), p. 01A115
Scientific journal article - peer reviewed
2016

Feasibility of Ambient RF Energy Harvesting for Self-Sustainable M2M Communications Using Transparent and Flexible Graphene Antennas

Michael Andersson, Ayca Ozcelikkale, Martin Johansson et al
IEEE Access. Vol. 4, p. 5850-5857
Scientific journal article - peer reviewed
2016

Characterization of Al2O3 gate dielectric for graphene electronics on flexible substrates

Xinxin Yang, Marlene Bonmann, Andrei Vorobiev et al
2016 Global Symposium on Millimeter Waves (GSMM) & ESA Workshop on Millimetre-Wave Technology and Applications , p. 153-156
Conference paper - 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

Effect of ferroelectric substrate on carrier mobility in graphene field-effect transistors

Samina Bidmeshkipour, Andrei Vorobiev, Michael Andersson et al
Applied Physics Letters. Vol. 107 (17), p. Article Number: 173106
Scientific journal article - 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

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

Graphene in Millimeter Wave Devices

Jan Stake, Michael Andersson, Audrey Zak et al
39th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2014, Tucson, United States, 14-19 September 2014, p. Art. no. 6956168
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

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

Towards Graphene Electrodes for High Performance Acoustic Resonators

Michael Andersson, Andrei Vorobiev, Jie Sun et al
WOCSDICE, p. 99-100
Conference paper - 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

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

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 varactors suitable for capacitive shunt switching

Guru Subramanyam, Andrei Vorobiev, Spartak Gevorgian 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

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

Ferroelectric thin film varactors for microwave devices, methods of characterization, circuit models

Andrei Vorobiev,
Ferroelectric Films at Microwave Frequencies, edited by P. Bao, T. J. Jackson and P. M. Suherman, Research Signpost, p. 57-94
Chapter in monograph, book
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

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 resonator

Spartak Gevorgian, Thomas Lewin, Harald Jacobsson et al
Patent
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

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

The potential of multiferroics for GHz and THz applications

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

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

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

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 varactors suitable for capacitive shunt switching

Guru Subramanyam, Andrei Vorobiev,
Patent
2007

Ferroelectric varactors suitable for capacitive shunt switching and wireless sensing

Guru Subramanyam, Andrei Vorobiev, Spartak Gevorgian 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

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

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

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

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

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

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

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

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
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

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

Silicon substrate integrated high Q-factor parallel-plate ferroelectric varactors

Andrei Vorobiev, Pär Rundqvist, Khaled Khamchane et al
Appl. Phys. Lett.. Vol. 83, p. 3144
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

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