Iltcho Angelov

Projektledare forskning at Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

As a researcher he worked with various microwave devices: Impatt, Gunn, BJT, FET, low noise & power amp., multipliers, oscillators, synchronization &phase modulation, designed transmitter equipment for space applications and earth receiving terminal. At Chalmers his main activity is related to FET and HBT modeling. Another area of interest is cryogenic amplifiers, nonlinear circuits: HEMT mixers, multipliers, oscillators, frequency dividers, low noise receivers up to 220 GHz.

Source: chalmers.se

Showing 81 publications

2017

A procedure for the extraction of a nonlinear microwave GaN FET model

G. Avolio, V. Vadala, Iltcho Angelov et al
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields. Vol. 30 (1), p. UNSP e2151-
Journal article
2017

Design and Analysis of a Wideband Gilbert Cell VGA in 0.25 um InP DHBT Technology With DC-40-GHz Frequency Response

Marcus Gavell, Sten Gunnarsson, Iltcho Angelov et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 65 (10), p. 3962-3974
Journal article
2016

On the Modeling of High Power FET Transistors

Iltcho Angelov, Mattias Thorsell, Marcus Gavell et al
2016 11th European Microwave Integrated Circuits Conference (Eumic), London, England, Oct 03-04, 2016, p. 245-248
Paper in proceedings
2016

A V-Band Stacked HEMT Power Amplifier With 25-dBm Saturated Output Power in 0.1-mu m InGaAs Technology

Marcus Gavell, Iltcho Angelov, Mattias Ferndahl et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 64 (12), p. 4232-4240
Journal article
2016

Octave Band Linear MMIC Amplifier With+40-dBm OIP3 for High-Reliability Space Applications

Oliver Silva Barrera, Iltcho Angelov, Herbert Zirath
IEEE Transactions on Microwave Theory and Techniques. Vol. 64 (7), p. 2059-2067
Journal article
2015

4 W Highly Linear and Reliable GaN Power Amplifier for C-Band Applications

Oliver Silva Barrera, Iltcho Angelov, Herbert Zirath
Asia-Pacific Microwave Conference, APMC 2015; Jinling HotelNanjing; China; 6 December 2015 through 9 December 2015. Vol. 3, p. Art. no. 7413430-
Paper in proceedings
2015

A High Voltage mm-wave Stacked HEMT Power Amplifier in 0.1 mu m m InGaAs Technology

Marcus Gavell, Iltcho Angelov, Mattias Ferndahl et al
2015 IEEE MTT-S International Microwave Symposium, IMS 2015
Paper in proceedings
2014

Low Phase Noise GaN HEMT Oscillators With Excellent Figures of Merit

Szhau Lai, Dan Kuylenstierna, MUSTAFA ÖZEN et al
IEEE Microwave and Wireless Components Letters. Vol. 24 (6), p. 412-414
Journal article
2014

Millimeter-Wave FET Nonlinear Modelling Based on the Dynamic-Bias Measurement Technique

G. Avolio, A. Raffo, Iltcho Angelov et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 62 (11), p. 2526-2537
Journal article
2014

A GaN MMIC Modified Doherty PA With Large Bandwidth and Reconfigurable Efficiency

David Gustafsson, Jessica Chani Cahuana, Dan Kuylenstierna et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 62 (12), p. 3006-3016
Journal article
2014

Nonlinear model for 40-GHz cold-FET operation

G. Avolio, A. Raffo, Iltcho Angelov et al
International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMiC 2014
Paper in proceedings
2014

Small-Versus Large-Signal Extraction of Charge Models of Microwave FETs

G. Avolio, A. Raffo, Iltcho Angelov et al
IEEE Microwave and Wireless Components Letters. Vol. 24 (6), p. 394-396
Journal article
2014

High linearity MMIC power amplifier design with controlled junction temperature

Oliver Silva Barrera, Iltcho Angelov, Herbert Zirath et al
International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMiC 2014, p. Art. no. 6815096-
Paper in proceedings
2013

Accurate Phase-Noise Prediction for a Balanced Colpitts GaN HEMT MMIC Oscillator

Szhau Lai, Dan Kuylenstierna, Mikael Hörberg et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 61 (11), p. 3916-3926
Journal article
2013

A novel technique for the extraction of nonlinear model for microwave transistors under dynamic-bias operation

G. Avolio, A. Raffo, Iltcho Angelov et al
IEEE MTT-S International Microwave Symposium Digest, p. Art. no. 6697394-
Paper in proceedings
2013

LDMOS Modeling

Szhau Lai, Christian Fager, Dan Kuylenstierna et al
IEEE Microwave Magazine. Vol. 14 (1), p. 108-116
Journal article
2013

A Wideband and Compact GaN MMIC Doherty Amplifier for Microwave Link Applications

David Gustafsson, Jessica Chani Cahuana, Dan Kuylenstierna et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 61 (2), p. 922-930
Journal article
2013

A packaged 86 W GaN transmitter with SiC varactor-based dynamic load modulation

Christer Andersson, MUSTAFA ÖZEN, David Gustafsson 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. 283-286
Paper in proceedings
2013

Experiment design for quick statistical FET large signal model extraction

Iltcho Angelov, Mattias Ferndahl, Marcus Gavell et al
81st ARFTG Microwave Measurement Conference: Metrology for High Speed Circuits and Systems, ARFTG 2013
Paper in proceedings
2013

Large-Signal Time-Domain Waveform-Based Transistor Modeling

Iltcho Angelov, G. Avolio, Dmmp Schreurs
Microwave De-embedding: From Theory to Applications, p. 189-223
Book chapter
2013

Hybrid measurement-based extraction of consistent large-signal models for microwave FETs

Iltcho Angelov, Mattias Thorsell, Dan Kuylenstierna et al
43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013; Nuremberg; Germany; 7 October 2013 through 10 October 2013, p. 267-270
Paper in proceedings
2012

On the implementation of device processing tolerances in FET Large Signal Models

Iltcho Angelov, Mattias Ferndahl, Marcus Gavell
2012 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMIC 2012
Paper in proceedings
2012

Multifunction low noise millimeterwave MMICs for remote sensing

Herbert Zirath, Vessen Vassilev, Morteza Abbasi et al
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2012

Theory and Design of Class-J Power Amplifiers With Dynamic Load Modulation

Christer Andersson, David Gustafsson, Koji Yamanaka et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 60 (12), p. 3778-3786
Journal article
2012

On the large-signal modeling of High Power AlGaN/GaN HEMTs

Iltcho Angelov, Mattias Thorsell, Kristoffer Andersson et al
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2012

Waveforms-based large-signal identification of transistor models

G. Avolio, D. Schreurs, A. Raffo et al
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2011

A varactor model including valanche noise source for VCOs phase noise simulation

Szhau Lai, Dan Kuylenstierna, Iltcho Angelov et al
41th European Microwave Conference , Manchester, UK, Oct 10-13, 2011, p. 591-594
Paper in proceedings
2011

Single-Chip 220-GHz Active Heterodyne Receiver and Transmitter MMICs With On-Chip Integrated Antenna

Morteza Abbasi, Sten Gunnarsson, Niklas Wadefalk et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 59 (2), p. 466-478
Journal article
2011

Semi-physical nonlinear circuit model with device/physical parameters for HEMTs

Hiroshi Otsuka, Toshiyuki Oishi, Koji Yamanaka et al
International Journal of Microwave and Wireless Technologies. Vol. 3 (1), p. 25-33
Journal article
2011

Identification technique of FET model based on vector nonlinear measurements

G. Avolio, D. Schreurs, A. Raffo et al
Electronics Letters. Vol. 47 (24), p. 1323-U37
Journal article
2010

Semi-physical nonlinear model for HEMTs with simple equations

Toshiyuki Oishi, Hiroshi Otsuka, Koji Yamanaka et al
2010 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMiC 2010; Goteborg; 26 April 2010 through 27 April 2010, p. 20-23
Paper in proceedings
2010

A large-signal GaAs HBT model optimized for design of low phase-noise VCOs

Szhau Lai, Iltcho Angelov, Dan Kuylenstierna et al
Gigahertz symposium 2010
Paper in proceedings
2010

Gm-boosted balanced Colpitts compared to conventional balanced Colpitts and cross-coupled VCOs in InGaP HBT technology

Szhau Lai, Dan Kuylenstierna, Iltcho Angelov et al
Asia-Pacific Microwave Conference Proceedings, APMC, Yokohama; 7 December through 10 December, p. 386-389
Paper in proceedings
2010

On the Large Signal Evaluation and Modeling of GaN FET

Iltcho Angelov, Mattias Thorsell, Kristoffer Andersson et al
IEICE Transactions on Electronics. Vol. E93C (8), p. 1225-1233
Journal article
2010

Low-phase noise InGaP HBT VCO design

Dan Kuylenstierna, Herbert Zirath, Rumen Kozhuharov et al
Gigahertz symposium 2010
Paper in proceedings
2010

On the Compact Equivalent  Circuit  Modeling

Iltcho Angelov, Mattias Thorsell, Kristoffer Andersson
APMC 2010 invited workshop. Vol. APMC 2010 invited workshop (APMC 2010 invited workshop)
Paper in proceedings
2010

Large Signal Model and Implementation of Impact Ionization for FET Devices

Iltcho Angelov, Mattias Ferndahl
Asia-Pacific Microwave Conference, APMC 2010; Yokohama; Japan; 7 December 2010 through 10 December 2010, p. 2299-2302
Paper in proceedings
2009

Integrated receivers up to 220 GHz utilizing GaAs-mHEMT technology

Herbert Zirath, Niklas Wadefalk, R. Kuzhuharov et al
2009 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2009; Singapore; Singapore; 9 January 2009 through 11 January 2009, p. 225-228
Paper in proceedings
2009

A Broadband 60-to-120 GHz single-chip MMIC multiplier chain

Morteza Abbasi, Rumen Kozhuharov, Camilla Kärnfelt et al
IEEE MTT-S International Microwave Symposium Digest, p. 441-444
Paper in proceedings
2009

Purely analytical extraction of an improved nonlinear FinFET model including non-quasi-static effects

G. Crupi, Dmmp Schreurs, A. Caddemi et al
Microelectronic Engineering. Vol. 86 (11), p. 2283-2289
Journal article
2009

On the status of Low Noise Millimeterwave MMIC Receivers

Herbert Zirath, Niklas Wadefalk, Rumen Kozhuharov et al
APMC: 2009 ASIA PACIFIC MICROWAVE CONFERENCE. Vol. 1-5, p. 1303-1306
Conference contribution
2009

Single-Chip Frequency Multiplier Chains for Millimeter-Wave Signal Generation

Morteza Abbasi, Rumen Kozhuharov, Camilla Kärnfelt et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 57 (12), p. 3134-3142
Journal article
2009

On the High Frequency De-Embedding& Modeling of FET Devices

Iltcho Angelov, K. Kanaya, S. Goto et al
73rd ARFTG Microwave Measurement Conference Spring 2009 - Practical Applications of Nonlinear Measurements; Boston, MA; United States; 12 June 2009 through 12 June 2009, p. 28-31
Paper in proceedings
2009

Combined empirical and look-up table approach for non-quasi-static modelling of GaN HEMTs

G. Crupi, Dominique Schreurs, A. Caddemi et al
9th International Conference on Telecommunications in Modern Satellite, Cable, and Broadcasting Services, TELSIKS 2009 - Proceedings of Paper, p. 40-43
Paper in proceedings
2009

Design of High Efficiency Ka-Band Harmonically Tuned Power Amplifiers

Hossein Mashad Nemati, Mattias Ferndahl, Iltcho Angelov et al
2009 IEEE Radio and Wireless Symposium, RWS 2009; San Diego, CA; United States; 18 January 2008 through 22 January 2008, p. 264-267
Paper in proceedings
2008

A G-band (140 – 220 GHz) Microstrip MMIC Mixer operating in both Resistive and Drain-Pumped Mode

Sten Gunnarsson, Niklas Wadefalk, Iltcho Angelov et al
Proc. of 2008 IEEE MTT-S International Microwave Symposium
Paper in proceedings
2008

A 220 GHz Single-Chip Receiver MMIC with Integrated Antenna

Sten Gunnarsson, Niklas Wadefalk, Iltcho Angelov et al
IEEE Microwave and Wireless Components Letter. Vol. 18
Journal article
2008

Doherty amplifier design for 3.5 GHz WiMAX considering load line and loop stability

M. A.Yarleque Medina, D. Schreurs, Iltcho Angelov et al
2008 European Microwave Integrated Circuit Conference, EuMIC 2008; Amsterdam; Netherlands; 27 October 2008 through 31 October 2008, p. 1549-1552
Paper in proceedings
2008

Analysis of quasi-static assumption in nonlinear finFET model

G. Crupi, A. Caddemi, D. Schreurs et al
2008 17th International Conference on Microwaves, Radar and Wireless Communications, MIKON 2008
Paper in proceedings
2008

Development of a 210 GHz near-field measurement radar system based on an antenna-integrated MMIC receiver front-end and an ultra-compact HBV transmitter source module

Jan Svedin, Jan Kjellgren, Staffan Rudner et al
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7117, p. Art. no. 71170H-
Paper in proceedings
2008

A 220 GHz (G-band) Microstrip MMIC Single-Ended Resistive Mixer

Sten Gunnarsson, Niklas Wadefalk, Iltcho Angelov et al
IEEE Microwave and Wireless Components Letter. Vol. vol. 18, no. 3
Journal article
2007

The Direct Detection Effect in the Hot-Electron Bolometer Mixer Sensitivity Calibration

Serguei Cherednichenko, Vladimir Drakinskiy, Therese Berg et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 55 (3), p. 504-510
Journal article
2007

Large signal evaluation of nonlinear HBT model

Iltcho Angelov, A. Inoue, S. Watanabe
IEICE Transactions on Electronics. Vol. E91C (7), p. 1091-1097
Paper in proceedings
2006

High Purity 60 GHz-Band Single Chip

Camilla Kärnfelt, Rumen Kozhuharov, Herbert Zirath et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 54 (6), p. 2887-2898
Journal article
2006

Empirical Device Models -Invited

Iltcho Angelov
EUMC2006 EUMC Workshop RF Device Modelling. Vol. 2006 (1), p. 1-
Paper in proceedings
2006

Large-Signal Modelling and Comparison of AlGaN/GaN HEMTs and SiC MESFETs

Iltcho Angelov, Kristoffer Andersson, D Schreuers et al
IEEE Asia PAcific Microwave Conference, 2006, Yokohama, Japan, p. 279-282
Paper in proceedings
2006

CMOS devices and circuits for microwave and millimeter wave applications

Herbert Zirath, Mattias Ferndahl, Bahar M. Motlagh et al
Asia Pacific Conference APMC 2006 Yukohama
Paper in proceedings
2006

CMOS LARGE SIGNAL and RF Noise MODEL FOR CAD

Iltcho Angelov, Mattias Ferndahl
EUMC2006 Manchester. Vol. 1 (1)
Paper in proceedings
2005

RF noise model for CMOS Transistors

Iltcho Angelov
GHZ 2005 Upsala. Vol. 1 (1), p. 205-209
Paper in proceedings
2005

On the Large-Signal Modelling of AlGaN/GaN HEMTs; GaAs ; and SiC MESFETs - Invited

Iltcho Angelov
Target Tutorial QS Modeling. Vol. April (2005)
Paper in proceedings
2005

CMOS devices and circuits for microwave and millimetre wave applications

Mattias Ferndahl, Bahar M. Motlagh, Anowar Masud et al
13th European Gallium Arsenide Conference, p. 105-8
Paper in proceedings
2005

MMICs for micro and millimetre wave applications

Mattias Ferndahl, Bahar M. Motlagh, Anowar Masud et al
Gigahertz 2005 conference
Journal article
2005

Effect of the direct detection effect on the HEB receiver sensitivity calibration

Serguei Cherednichenko, Erik Kollberg, Iltcho Angelov et al
Proc.16th Intern. Symp. Space THz Technology, Gothenburg, Sweden, May. 2005.
Conference contribution
2005

On the large-signal modelling of AlGaN/GaN HEMTs and SiC MESFETs

Iltcho Angelov, Vincent Desmaris, Kristina Dynefors et al
Proceedings of the GAAS05 conference
Paper in proceedings
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
Paper in proceedings
2005

On the Large-Signal Modelling of AlGaN/GaN HEMTs; GaAs ; and SiC MESFETs

Iltcho Angelov
Invited paper Target Tutorial QS Modeling Orcietto Italy. Vol. 1 (1), p. 101-121
Conference poster
2005

4-8 GHz Low Noise Amplifier using Metamorphic HEMT Technology

Matthew Kelly, Iltcho Angelov, Piotr Starski et al
Gigahertz 2005
Conference contribution
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
Paper in proceedings
2004

Cryogenic 2--4 GHz ultra low noise amplifier

Anders Mellberg, Niklas Wadefalk, Iltcho Angelov et al
IEEE MTT-S International Microwave Symposium Digest, p. 161-163
Paper in proceedings
2004

An empirical table based HBT large signal model

Iltcho Angelov, Dominique Schreurs, Kristoffer Andersson et al
34th European Microwave Conference. Vol. 1, p. 229-232
Paper in proceedings
2003

90-nm CMOS for microwave power applications

Mattias Ferndahl, Hans-Olof Vickes, Herbert Zirath et al
IEEE Microwave and Wireless Components Letters. Vol. 13 (12), p. 523-525
Journal article
2003

CMOS large signal model for CAD

Iltcho Angelov, Mattias Ferndahl, Fredrik Ingvarson et al
2003 IEEE MTT-S International Microwave Symposium Digest. Vol. 2, p. 643-646
Paper in proceedings
1999

Design and Performance of a 3.4 to 4.6 GHz Active Equalizer with Controlled Gain Slope

Vessen Vassilev, Iltcho Angelov, Victor Belitsky
Applied Microwave&Wireless. Vol. 11 (12), p. 30-34
Journal article
1996

Extensions of the Chalmers nonlinear HEMT and MESFET model

Iltcho Angelov, Lars Bengtsson
IEEE Transactions on Microwave Theory and Techniques. Vol. 44 (10), p. 1664-
Journal article
1993

W-band subharmonically pumped resistive mixer based on pseudomorphic heterostructure field effect transistor technology

Herbert Zirath, Iltcho Angelov, Niklas Rorsman et al
Proceedings of the 1993 IEEE MTT-S International Microwave Symposium Digest. Vol. 1, p. 341-344
Paper in proceedings
1993

F-band resistive mixer based on heterostructure field effect transistor technology

Iltcho Angelov, Herbert Zirath, Niklas Rorsman et al
Proceedings of the 1993 IEEE MTT-S International Symposium on Circuits and Systems. Vol. 2, p. 787-790
Paper in proceedings
1992

A new empirical nonlinear model for HEMT-devices

Iltcho Angelov, Herbert Zirath, Niklas Rorsman
1992 IEEE MTT-S International Microwave Symposium Digest. Vol. 3, p. 1583-1586
Paper in proceedings
1992

A balanced millimeter wave doubler based on pseudomorphic HEMTs

Iltcho Angelov, Herbert Zirath, Niklas Rorsman et al
1992 IEEE MTT-S International Microwave Symposium Digest. Vol. 1, p. 353-356
Paper in proceedings
1992

A millimeterwave subharmonically pumped resistive mixer based on a heterostructure field effect transistor technology

Herbert Zirath, Iltcho Angelov, Niklas Rorsman
1992 IEEE MTT-S International Microwave Symposium Digest. Vol. 2, p. 599-602
Paper in proceedings
1992

Characteristics of a millimeter wave drain mixer

Herbert Zirath, Iltcho Angelov, Niklas Rorsman et al
Proceedings of the 22nd European Microwave Conference. Vol. 2 (22), p. 987-992
Paper in proceedings
1992

HFET millimeterwave resistive mixer

Herbert Zirath, Iltcho Angelov, Niklas Rorsman
Proceedings of the 22nd European Microwave Conference. Vol. 1 (22), p. 614-619
Paper in proceedings

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