Christian Fager
Enhetschef at
Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics, Microwave Electronics
Showing 177 publications
2019
A low-complexity distributed-MIMO testbed based on high-speed sigma-delta-over-fiber
Martin Dahlgren, Ibrahim Can Sezgin, Thomas Eriksson et al
IEEE Transactions on Microwave Theory and Techniques
Journal article
2019
Effect of VCSEL characteristics on ultra-high speed sigma-delta-over-fiber communication links
Ibrahim Can Sezgin, Johan Gustavsson, Tamas Lengyel et al
Journal of Lightwave Technology
Journal article
2019
Augmented Hammerstein model for the calibration of six-port based dual band wireless receivers
Nadia Chagtmi, Noureddine Boulejfen, Weiwei Zhang et al
International Journal of RF and Microwave Computer-Aided Engineering. Vol. 29 (2)
Journal article
2018
Design Considerations and Evaluation of a High-Speed SAR ADC
Victor Åberg, Christian Fager, Lars Svensson
2018 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC)
Paper in proceedings
2018
Accurate Modeling of GaN HEMT RF Behavior Using an Effective Trapping Potential
Ankur Prasad, Mattias Thorsell, Herbert Zirath et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 66 (2), p. 845-857
Journal article
2018
A Generalized 3-dB Wilkinson Power Divider/Combiner With Complex Terminations
William Hallberg, Mustafa Ozen, Dan Kuylenstierna et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 66 (10), p. 4497-4506
Journal article
2018
Investigations of Active Antenna Doherty Power Amplifier Modules Under Beam-Steering Mismatch
Bersant Gashi, Sebastian Krause, Rudiger Quay et al
IEEE Microwave and Wireless Components Letters. Vol. 28 (10), p. 930-932
Journal article
2018
Lower Bound for the Normalized Mean Square Error in Power Amplifier Linearization
Jessica Chani Cahuana, Christian Fager, Thomas Eriksson
IEEE Microwave and Wireless Components Letters. Vol. 28 (5), p. 425-427
Journal article
2018
RF Front-End Circuits and Architectures for IoT/LTE-A/5G Connectivity
Yan Li, Donald Y. C. Lie, Chaojiang Li et al
Wireless Communications and Mobile Computing
Introductory text in journal
2018
Modeling and Linearization of Multi-Antenna Transmitters Using Over-the-Air Measurements
Katharina Hausmair, Ulf Gustavsson, Christian Fager et al
Proceedings - IEEE International Symposium on Circuits and Systems
Paper in proceedings
2018
A Methodology for Analysis of mm-Wave Transmitter Linearization Trade-offs Under Spectrum Constraints
H. Volkan Hunerli, Marcus Gavell, Parastoo Taghikhani et al
International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMIC 2018 - Proceedings
Paper in proceedings
2018
Analysis of Thermal Effects in Integrated Radio Transmitters
Christian Fager, Mattias Thorsell, Emanuel Baptista et al
2018 INTERNATIONAL SYMPOSIUM ON VLSI TECHNOLOGY, SYSTEMS AND APPLICATION (VLSI-TSA)
Paper in proceedings
2018
Digital Predistortion for Multi-Antenna Transmitters Affected by Antenna Crosstalk
Katharina Hausmair, Per Landin, Ulf Gustavsson et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 66 (3), p. 1524-1535
Journal article
2018
A Flexible Multi-Gbps Transmitter Using Ultra-High Speed Sigma- Delta-over- Fiber
Ibrahim Can Sezgin, Thomas Eriksson, Johan Gustavsson et al
IEEE MTT-S International Microwave Symposium Digest. Vol. 2018-June, p. 1195-1198
Paper in proceedings
2018
Characterization of linear power amplifiers for LTE applications
William Hallberg, Paolo Enrico De Falco, MUSTAFA ÖZEN et al
PAWR 2018 - Proceedings 2018 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications. Vol. 2018-January, p. 32-34
Paper in proceedings
2018
Design and Large-Signal Characterization of High-Power Varactor-Based Impedance Tuners
Cesar Sanchez Perez, Christer Anderson, Koen Buisman et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 66 (4), p. 1744-1753
Journal article
2018
Analysis and Design of a Doherty-Like RF-Input Load Modulated Balanced Amplifier
Prathamesh H. Pednekar, William Hallberg, Christian Fager et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 66 (12), p. 5322-5335
Journal article
2017
Driver Topologies for RF Doherty Power Amplifiers
Paul Saad, Zahra Asghari, Christian Fager et al
IEEE Microwave and Wireless Components Letters. Vol. 27 (1), p. 67-69
Journal article
2017
Vector-corrected Nonlinear Multi-port IQ-mixer Characterization using Modulated Signals
Sebastian Gustafsson, Mattias Thorsell, Koen Buisman et al
IEEE MTT-S International Microwave Symposium Digest, p. 1433-1436
Paper in proceedings
2017
Efficient Millimeter Wave Doherty PA Design Based on a Low-Loss Combiner Synthesis Technique
MUSTAFA ÖZEN, Narek Rostomyan, Klaus Aufinger et al
IEEE Microwave and Wireless Components Letters. Vol. 27 (12), p. 1143-1145
Journal article
2017
Digital Predistortion Parameter Identification for RF Power Amplifiers Using Real-Valued Output Data
Jessica Chani Cahuana, Thomas Eriksson, Christian Fager et al
IEEE Transactions on Circuits and Systems II: Express Briefs. Vol. 64 (10), p. 1227-1231
Journal article
2017
Design of linear and efficient power amplifiers by generalization of the Doherty theory
Christian Fager, William Hallberg, MUSTAFA ÖZEN et al
Conference contribution
2017
A Generalized Combiner Synthesis Technique for Class-E Outphasing Transmitters
MUSTAFA ÖZEN, M. P. Van Der Heijden, M. Acar et al
IEEE Transactions on Circuits and Systems I: Regular Papers. Vol. 64 (5), p. 1126-1139
Journal article
2017
Analysis of nonlinear distortion in phased array transmitters
Christian Fager, Katharina Hausmair, Koen Buisman et al
Proceedings of the 2017 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMiC 2017
Paper in proceedings
2017
Prediction of Nonlinear Distortion in Wideband Active Antenna Arrays
Katharina Hausmair, Sebastian Gustafsson, Cesar Sanchez Perez et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 65 (11), p. 4550-4563
Journal article
2017
Analysis of thermal coupling effects in integrated MIMO transmitters
Emanuel Baptista, Koen Buisman, J.C. Vaz et al
IEEE MTT-S International Microwave Symposium Digest, p. 75-78
Paper in proceedings
2016
Current scaled Doherty amplifier for high efficiency and high linearity
William Hallberg, MUSTAFA ÖZEN, Christian Fager
IEEE MTT-S International Microwave Symposium Digest, p. Art. no. 7540185-
Paper in proceedings
2016
A Doherty Power Amplifier Design Method for Improved Efficiency and Linearity
William Hallberg, MUSTAFA ÖZEN, David Gustafsson et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 64 (12), p. 4491-4504
Journal article
2016
Iterative Learning Control for RF Power Amplifier Linearization
Jessica Chani Cahuana, P. N. Landin, Christian Fager et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 64 (9), p. 2778-2789
Journal article
2016
Structured Digital Predistorter Model Derivation Based on Iterative Learning Control
Jessica Chani Cahuana, P. N. Landin, Christian Fager et al
2016 46th European Microwave Conference, p. 178-181
Paper in proceedings
2016
Symmetrical Doherty Power Amplifier With Extended Efficiency Range
MUSTAFA ÖZEN, K. Andersson, Christian Fager
IEEE Transactions on Microwave Theory and Techniques. Vol. 64 (4), p. 1273-1284
Journal article
2016
Doherty's Legacy
R. Pengelly, Christian Fager, MUSTAFA ÖZEN
IEEE Microwave Magazine. Vol. 17 (2), p. 41-58
Journal article
2016
Digital Predistorter Model Derivation Based on Iterative Learning Control
Jessica Chani Cahuana, Per Landin, Christian Fager et al
IEEE European Microwave Conference
Paper in proceedings
2016
Accurate Circuit Characterization Methods for mm‐Wave 5G Systems
Sebastian Gustafsson, Mattias Thorsell, Jörgen Stenarson et al
GigaHertz Symposium, March, Linköping
Conference contribution
2016
Wideband RF characterization setup with high dynamic range low frequency measurement capabilities
Sebastian Gustafsson, Christian Fager, Koen Buisman et al
2016 87th ARFTG Microwave Measurement Conference
Paper in proceedings
2015
Symmetry based nonlinear model for GaN HEMTs
Ankur Prasad, Mattias Thorsell, Klas Yhland et al
10th European Microwave Integrated Circuits Conference (EuMIC), 2015, p. 85-88
Paper in proceedings
2015
A new variant of the indirect learning architecture for the linearization of power amplifiers
Jessica Chani Cahuana, Christian Fager, Thomas Eriksson
2015 European Microwave Conference (EuMIC), p. 444-447
Paper in proceedings
2015
A class-J power amplifier with varactor-based dynamic load modulation across a large bandwidth
William Hallberg, David Gustafsson, MUSTAFA ÖZEN et al
2015 IEEE MTT-S International Microwave Symposium, IMS 2015
Paper in proceedings
2015
An Oscilloscope Correction Method for Vector-Corrected RF Measurements
Sebastian Gustafsson, Mattias Thorsell, Jörgen Stenarson et al
IEEE Transactions on Instrumentation and Measurement. Vol. 64 (9), p. 2541-2547
Journal article
2015
Symmetry based Nonlinear Model for GaN
Ankur Prasad, Mattias Thorsell, Klas Yhland et al
2015 10th European Microwave Integrated Circuits Conference (Eumic), p. 85-88
Journal article
2015
WebLab: A Web-Based Setup for PA Digital Predistortion and Characterization
Per Landin, Sebastian Gustafsson, Christian Fager et al
IEEE Microwave Magazine. Vol. 16 (1), p. 138-140
Journal article
2015
Optimized Design of a Dual-Band Power Amplifier With SiC Varactor-Based Dynamic Load Modulation
Cesar Sanchez Perez, MUSTAFA ÖZEN, Christer Andersson et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 63 (8), p. 2579-2588
Journal article
2015
A new variant of the indirect learning architecture for the linearization of power amplifiers
Jessica Chani Cahuana, Christian Fager, Thomas Eriksson
European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings, 2015 45th European Microwave Conference Proceedings, EuMC, p. 1295-1298
Paper in proceedings
2015
Outphasing combiner synthesis from transistor load pull data
M Pamoin-Gonzalez, MUSTAFA ÖZEN, Cesar Sanchez Perez et al
2015 IEEE MTT-S International Microwave Symposium, IMS 2015
Paper in proceedings
2015
Analysis of thermal effects in active antenna array transmitters using a combined EM/circuit/thermal simulation technique
Christian Fager, Katharina Hausmair, Thomas Eriksson et al
2015 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC)
Paper in proceedings
2014
Efficient and Wideband Power Amplifiers for Wireless Infrastructure Applications
Christian Fager, Ulf Gustavsson, Christer Andersson et al
Gigahertz Symposium
Conference contribution
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
Efficiency optimization for phase controlled multi-source microwave oven
A. Wieckowski, P. Korpas, M. Krysicki et al
International Journal of Applied Electromagnetics and Mechanics. Vol. 44 (2), p. 235-241
Journal article
2014
Prediction of smart antenna transmitter characteristics using a new behavioral modeling approach
Christian Fager, Xavier Bland, Katharina Hausmair et al
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2014
Linearization of dual-input Doherty power amplifiers
Jessica Chani Cahuana, Per Landin, David Gustafsson et al
International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMiC 2014, p. Art. no. 6815085-
Paper in proceedings
2014
Symmetrical modeling of GaN HEMTS
Ankur Prasad, Christian Fager, Mattias Thorsell et al
Technical Digest - IEEE Compound Semiconductor Integrated Circuit Symposium, CSIC
Paper in proceedings
2014
On the Impact of Hardware Impairments on Massive MIMO
Ulf Gustavsson, Cesar Sanchez Perez, Thomas Eriksson et al
IEEE Globecom 2014 Workshop - Massive MIMO: From Theory to Practice, 2014-12-08, Austin, Texas, USA, p. 294-300
Paper in proceedings
2014
Digital predistortion of concurrent multiband communication systems
Thomas Eriksson, Christian Fager
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, p. 3918-3922
Paper in proceedings
2014
Wideband and efficient watt-level SiGe BiCMOS switching mode power amplifier using continuous class-E modes theory
MUSTAFA ÖZEN, M. Acar, M.P. Van Der Heijden et al
Digest of Papers - 2014 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2014; Tampa Bay, FL; United States; 1 June 2014 through 3 June 2014, p. 243-246
Paper in proceedings
2014
Scalability Analysis and Modeling of Future Massive MIMO Antenna Array Systems
Rob Maaskant, Christian Fager, Xavier Bland et al
Gigahertz Symposium
Conference contribution
2014
Symmetrical Large-Signal Modeling of Microwave Switch FETs
Ankur Prasad, Christian Fager, Mattias Thorsell et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 62 (8), p. 1590-1598
Journal article
2014
Linearization of Difficult Cases - MIMO, GaN and Deep Compression
Thomas Eriksson, Christian Fager, Per Landin et al
Gigahertz Symposium
Conference contribution
2014
Symmetrical doherty amplifier with high efficiency over large output power dynamic range
MUSTAFA ÖZEN, Christian Fager
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2014
Design Method for Quasi-Optimal Multiband Branch-Line Couplers
L. Piazzon, Paul Saad, P. Colantonio et al
International Journal of RF and Microwave Computer-Aided Engineering. Vol. 24 (1), p. 117-129
Journal article
2013
A 44 dBm 1.0-3.0 GHz GaN Power Amplifier with over 45% PAE at 6 dB back-off
David Gustafsson, Christer Andersson, Richard Hellberg et al
Proc. International Microwave Symposium
Paper in proceedings
2013
An analysis of the suitability of using CW-theory when designing Doherty PAs for wideband or concurrent multi-band operation
David Gustafsson, Christer Andersson, Christian Fager
43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013, Nuremberg, Germany, 7-10 October 2013, p. 287-290
Paper in proceedings
2013
Linearity, Intermodulation Distortion and ACLR in Outphasing Amplifiers
J Fritzin, A. Alvandpour, Per Landin et al
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2013
A Novel Active Load-pull System with Multi-Band Capabilities
Sebastian Gustafsson, Mattias Thorsell, Christian Fager
81st ARFTG Microwave Measurement Conference
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 Modified Doherty Power Amplifier With Extended Bandwidth and Reconfigurable Efficiency
David Gustafsson, Christer Andersson, Christian Fager
IEEE Transactions on Microwave Theory and Techniques. Vol. 61 (1), p. 533-542
Journal article
2013
A 1-3-GHz Digitally Controlled Dual-RF Input Power-Amplifier Design Based on a Doherty-Outphasing Continuum Analysis
Christer Andersson, David Gustafsson, Jessica Chani Cahuana et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 61 (10), p. 3743-3752
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
Investigation of Push-Pull Microwave Power Amplifiers Using an Advanced Measurement Setup
Paul Saad, Mattias Thorsell, Kristoffer Andersson et al
IEEE Microwave and Wireless Components Letters. Vol. 23 (4), p. 220-222
Journal article
2012
Oscilloscope based two-port measurement system using error-corrected modulated signals
Kristoffer Andersson, Christian Fager
2012 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMIC 2012
Paper in proceedings
2012
Modeling of Long Term Memory Effects in RF Power Amplifiers with Dynamic Parameters
Ali Soltani Tehrani, Thomas Eriksson, Christian Fager
IEEE MTT-S International Microwave Symposium Digest, p. Art. no. 6259496-
Paper in proceedings
2012
Digital Predistortion for High Efficiency Power Amplifier Architectures Using a Dual-input Modeling Approach
Haiying Cao, Hossein Mashad Nemati, Ali Soltani Tehrani et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 60 (2), p. 361-369
Journal article
2012
2-D Enhanced Hammerstein Behavior Model for Concurrent Dual-Band Power Amplifier
Junghwan Moon, Paul Saad, Junghwan Son et al
European Microwave Integrated Circuits Conference
Paper in proceedings
2012
Continuous Class-E Power Amplifier Modes
MUSTAFA ÖZEN, Rik Jos, Christian Fager
IEEE Transactions on Circuits and Systems II: Express Briefs. Vol. 59 (11), p. 731-735
Journal article
2012
2-D enhanced hammerstein behavior model for concurrent dual-band power amplifiers
J. Moon, Paul Saad, J. Son et al
European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012, p. 1249-1252
Paper in proceedings
2012
Design and characterization of SiC varactor-based phase shifters
Roberto Quaglia, Victor Camarchia, Christer Andersson et al
7th European Microwave Integrated Circuits Conference, EuMIC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012; Amsterdam; Netherlands; 29 October 2012 through 30 October 2012, p. 897-900
Paper in proceedings
2012
Design of a Concurrent Dual-Band 1.8-2.4-GHz GaN-HEMT Doherty Power Amplifier
Paul Saad, P. Colantonio, L. Piazzon et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 60 (6), p. 1840-1849
Journal article
2012
A novel wideband and reconfigurable high average efficiency power amplifier
David Gustafsson, Christer Andersson, Christian Fager
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2012
Digital Predistortion Using a Vector Switched Model
Sepideh Afsar Doost, Thomas Eriksson, Christian Fager
IEEE Transactions on Microwave Theory and Techniques. Vol. 60 (4), p. 1166-1174
Journal article
2012
Linearization Study of a Highly Efficient CMOS-GaN RF Pulse Width Modulation Based Transmitter
MUSTAFA ÖZEN, Christer Andersson, Thomas Eriksson et al
European Microwave Conference, p. 136-139
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
An RF Carrier Bursting System using Partial Quantization Noise Cancellation
Ulf Gustavsson, Thomas Eriksson, Hossein Mashad Nemati et al
IEEE Transactions on Circuits and Systems I: Regular Papers. Vol. 59 (3), p. 515-528
Journal article
2012
Branch-Line Coupler Design Operating in Four Arbitrary Frequencies
L. Piazzon, Paul Saad, P. Colantonio et al
IEEE Microwave and Wireless Components Letters. Vol. 22 (2), p. 67-69
Journal article
2012
Digital Predistortion for Dual-Input Doherty Amplifiers
Haiying Cao, Jawad Qureshi, Thomas Eriksson et al
RWW 2012 - Proceedings. 2012 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, PAWR 2012. Santa Clara, CA, 15-18 January 2012, p. 45-48
Paper in proceedings
2012
Concurrent Dual-Band GaN-HEMT Power Amplifier at 1.8 GHz and 2.4 GHz
Paul Saad, P. Colantonio, Junghwan Moon et al
13th annual IEEE Wireless and Microwave Technology Conference
Paper in proceedings
2012
Multi-band/Multi-mode and Efficient Transmitter Based on a Doherty Power Amplifier
Paul Saad, L. Piazzon, P. Colantonio et al
7th European Microwave Integrated Circuits Conference, EuMIC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012; Amsterdam; Netherlands; 29 October 2012 through 30 October 2012, p. 1031-1034
Paper in proceedings
2012
Decade bandwidth high efficiency GaN HEMT power amplifier designed with resistive harmonic loading
Christer Andersson, J. Moon, Christian Fager et al
IEEE MTT-S International Microwave Symposium Digest
Paper in proceedings
2011
Comparison of bandwidth reduction schemes in dynamic load modulation power amplifier architectures
Haiying Cao, Christian Fager, Talha Khan et al
IEEE Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), 2011, p. 1-4
Paper in proceedings
2011
Uncertainties in small-signal equivalent circuit modeling
Christian Fager, Kristoffer Andersson, Mattias Ferndahl
Nonlinear Transistor Model Parameter Extraction Techniques
Book chapter
2011
A double stub impedance tuner with SiC diode varactors
Roberto Quaglia, Christer Andersson, Christian Fager et al
Asia Pacific Microwave Conference APMC 2011; Melbourne, VIC; 5 - 8 December 2011, p. 267-270
Paper in proceedings
2011
High efficiency power amplifier design using switch mode optimized transistor models
Christian Fager, Hossein Mashad Nemati, Paul Saad et al
IEEE International Microwave Conference, Baltimore, Workshop on WMJ: Compact Equivalent Circuits and Table Based FET Models ‐ Is There One Winner for Circuit Designers and Foundries?
Conference contribution
2011
Measurement setup for digital predistortion adaptation
Ali Soltani Tehrani, Thomas Eriksson, Christian Fager
RF Measurement Technology Conference, Gävle 2011
Conference contribution
2011
Varactor-Based Dynamic Load Modulation of RF PAs
Hossein Mashad Nemati, Björn Almgren, Christer Andersson et al
European Microwave Conference, Manchester, Workshop "RF PA Efficiency Enhancement Techniques"
Conference contribution
2011
Highly efficient GaN-HEMT power amplifiers at 3.5 GHz and 5.5 GHz
Paul Saad, Hossein Mashad Nemati, Kristoffer Andersson et al
2011 IEEE 12th Annual Wireless and Microwave Technology Conference, WAMICON 2011
Paper in proceedings
2011
Nonlinear Transistor Model Parameter Extraction Techniques
Mathias Rudolph, Christian Fager, David Root
Edited book
2011
High-Efficiency RF Pulsewidth Modulation of Class-E Power Amplifiers
MUSTAFA ÖZEN, Hendrikus Jos, Christer Andersson et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 59 (11), p. 2931-2942
Magazine article
2011
High-Efficiency Power Amplifier
Hossein Mashad Nemati, Paul Saad, Christian Fager et al
IEEE Microwave Magazine. Vol. 12 (1), p. 81-84
Journal article
2011
High efficiency RF pulse width modulation with tunable load network class-E PA
MUSTAFA ÖZEN, Christer Andersson, Mattias Thorsell et al
2011 IEEE 12th Annual Wireless and Microwave Technology Conference, WAMICON 2011
Paper in proceedings
2010
High Efficiency Transmitter Using Varactor Based Dynamic Load Modulation
Christian Fager, Haiying Cao, Thomas Eriksson et al
IEEE International Microwave Workshop Series on “RF Front-ends for Software Defined and Cognitive Radio Solutions”, p. 37-40
Paper in proceedings
2010
Band-reconfigurable LDMOS power amplifier
Hossein Mashad Nemati, Jan Grahn, Christian Fager
2010 European Microwave Conference, p. 978-981
Paper in proceedings
2010
A highly efficient 1-GHz, 15-W power amplifier design based on a 50-V LDMOS transistor
Peter Singerl, Christian Fager, Z Wang et al
IEEE MTT-S International Microwave Symposium Digest, p. 1102-1105
Paper in proceedings
2010
A highly efficient 3.5 GHz inverse class-F GaN HEMT power amplifier
Paul Saad, Christian Fager, Hossein Mashad Nemati et al
International Journal of Microwave and Wireless Technologies. Vol. 2 (3-4), p. 317-324
Journal article
2010
Low-complexity volterra modeling of power amplifiers
Thomas Eriksson, Ali Soltani Tehrani, Haiying Cao et al
2010 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, INMMiC 2010; Goteborg; 26 April 2010 through 27 April 2010, p. 136-139
Paper in proceedings
2010
A broadband, efficient, overdriven class-J RF power amplifier for burst mode operation
D.R. Parveg, P. Singerl, A. Wiesbauer et al
European Microwave Week 2010: Connecting the World, EuMIC 2010 - Conference Proceedings, p. 424-427
Conference contribution
2010
Design of Highly Efficient Load Modulation Transmitter for Wideband Cellular Applications
Hossein Mashad Nemati, Haiying Cao, B. Almgren et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 58 (11), p. 2820-2828
Journal article
2010
Successive Cancellation of Power Amplifier Distortion for Multiuser Detection
Ali Soltani Tehrani, Ali Behravan, Haiying Cao et al
IEEE Vehicular Technology Conference
Paper in proceedings
2010
Linearization of Efficiency-Optimized Dynamic Load Modulation Transmitter Architectures
Haiying Cao, Hossein Mashad Nemati, Ali Soltani Tehrani et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 58 (4), p. 873-881
Journal article
2010
Design of a Highly Efficient 2–4-GHz Octave Bandwidth GaN-HEMT Power Amplifier
Paul Saad, Christian Fager, Haiying Cao et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 58 (7), p. 1677-1685
Journal article
2010
Quantization Noise Minimization in ΣΔ-modulation based RF Transmitter Architectures
Ulf Gustavsson, Thomas Eriksson, Christian Fager
IEEE Transactions on Circuits and Systems I: Regular Papers. Vol. 57 (12), p. 3082-3091
Journal article
2010
Model-Based Adaptation of RF Power Amplifiers
Thomas Eriksson, Ali Soltani Tehrani, Christian Fager
GHz Symposium 2010
Conference contribution
2010
Evaluation of a GaN HEMT transistor for load- and supply-modulation applications using intrinsic waveform measurements
Hossein Mashad Nemati, Alan L. Clarke, Steve C. Cripps et al
IEEE MTT-S International Microwave Symposium Digest, p. 509-512
Paper in proceedings
2010
Complexity Analysis of Power Amplifier Behavioral Models
Ali Soltani Tehrani, Haiying Cao, Christian Fager et al
International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits, p. 102-105
Paper in proceedings
2010
A Comparative Analysis of the Complexity/Accuracy Tradeoff in Power Amplifier Behavioral Models
Ali Soltani Tehrani, Haiying Cao, Sepideh Afsar Doost et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 58 (6), p. 1510-1520
Journal article
2010
Highly Efficient Dynamic Load Modulation Transmitter
Christian Fager, Hossein Mashad Nemati, Haiying Cao et al
Prog. GigaHertz 2010
Conference contribution
2009
Characterization Setup for Device Level Dynamic Load Modulation Measurements
Mattias Thorsell, Kristoffer Andersson, Christian Fager
International Microwave Symposium Digest, 2009, Boston
Paper in proceedings
2009
An Inverse Class-F GaN HEMT Power Amplifier with 78% PAE at 3.5 GHz
Paul Saad, Hossein Mashad Nemati, Mattias Thorsell et al
Microwave Conference, 2009. EuMC 2009. European, Sept. 29 2009-Oct. 1 2009, Rome, p. 496-499
Paper in proceedings
2009
I/Q Imbalance Compensation Using a Nonlinear Modeling Approach
Haiying Cao, Ali Soltani Tehrani, Christian Fager et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 57 (3), p. 513-518
Journal article
2009
High-Efficiency LDMOS Power-Amplifier Design at 1 GHz Using an Optimized Transistor Model
Hossein Mashad Nemati, Christian Fager, Mattias Thorsell et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 57 (7), p. 1647-1654
Journal article
2009
Design of Varactor-Based Tunable Matching Networks for Dynamic Load Modulation of High Power Amplifiers
Hossein Mashad Nemati, Christian Fager, Ulf Gustavsson et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 57 (5), p. 1110-1118
Journal article
2009
Time Mismatch Effects in a Dynamic Load Modulation Transmitter Architecture
Haiying Cao, Ali Soltani Tehrani, Hossein Mashad Nemati et al
RF Measurement Technology for State of the Art Production and Design(RFMTC09)
Conference contribution
2009
A general method for passband quantization noise suppression in pulsed transmitter architectures.
Ulf Gustavsson, Christian Fager, Thomas Eriksson
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International., p. 1529 - 1532
Journal article
2009
Dynamic load modulation of high power amplifiers with varactor-based matching networks
Ali Soltani Tehrani, Hossein Mashad Nemati, Haiying Cao et al
IEEE MTT-S International Microwave Symposium Digest, p. 1537-1540
Paper in proceedings
2009
Evaluation of high efficiency PAs for use in supply- and load-modulation transmitters
Christian Fager, Hossein Mashad Nemati, Ulf Gustavsson et al
IEEE Topical Symposium on Power Amplifiers for Wireless Communications
Paper in proceedings
2009
Multi-line TRL calibration compared to a general de-embedding method
Mattias Ferndahl, Kristoffer Andersson, Christian Fager
ARFTG 73rd Microwave Measurement Conference. Vol. 1
Paper in proceedings
2009
Noise-Shaped Coding and Quantization Noise Suppression for Pulsed Transmitter Architectures
Ulf Gustavsson, Christian Fager, Thomas Eriksson
RFMTC
Conference contribution
2009
Dual-Input Nonlinear Modeling for I/Q Modulator Distortion Compensation
Haiying Cao, Ali Soltani Tehrani, Christian Fager et al
2009 IEEE Radio and Wireless Symposium, RWS 2009; San Diego, CA; United States; 18 January 2008 through 22 January 2008, p. 39-42
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
2009
Nonideality sources and implementation considerations in polar transmitters
Jose A. Garcia, Jose C. Pedro, Pedro Miguel Cabral et al
International Journal of Microwave and Wireless Technologies. Vol. 1 (2), p. 109-116
Journal article
2009
Time Alignment in a Dynamic Load Modulation Transmitter Architecture
Haiying Cao, Ali Soltani Tehrani, Hossein Mashad Nemati et al
Proceedings of the 39th European Microwave Conference, EuMC 2009, Sept. 29-Oct. 1 2009, Rome, p. 1211 - 1214
Paper in proceedings
2008
Identification of Distortions in a RF Measurement System
Haiying Cao, Ali Soltani Tehrani, Christian Fager et al
GHz Symposium 2008
Conference contribution
2008
SiC Varactors for Dynamic Load Modulation of High Power Amplifiers
Mattias Sudow, Hossein Mashad Nemati, Mattias Thorsell et al
IEEE Electron Device Letters. Vol. 29 (7), p. 728-730
Journal article
2008
Practical realizations of high efficiency switched mode power amplifiers
Hossein Mashad Nemati, Christian Fager, Ulf Gustavsson et al
German Microwave Conference, GEMIC 2008; Hamburg University of Technology (TUHH)Hamburg-Harburg; Germany; 10 March 2008 through 12 March 2008
Conference contribution
2008
Power Amplifier Behavioral Modeling Performance Comparison of the LSNA and the modulation-domain system
Per Landin, Christian Fager, Magnus Isaksson et al
Proc. 72nd ARFTG Conference
Paper in proceedings
2008
Compensation of Transmitter Distortion Using a Nonlinear Modeling Approach
Haiying Cao, Ali Soltani Tehrani, Christian Fager et al
International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits 2008, p. 131-134
Paper in proceedings
2008
A General Statistical Equivalent-Circuit-Based De-Embedding Procedure for High-Frequency Measurements
Mattias Ferndahl, Christian Fager, Kristoffer Andersson et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 56 (12), p. 2692-2700
Journal article
2008
Nonideality Sources and Implementation Considerations in Polar Transmitters
J.A. Garcia, J.C. Pedro, Christian Fager et al
Proc. European Microwave Association (EuMA), 2008
Paper in proceedings
2008
Characterization of switched mode LDMOS and GaN power amplifiers for optimal use in polar transmitter architectures
Hossein Mashad Nemati, Christian Fager, Ulf Gustavsson et al
IEEE MTT-S International Microwave Symposium Digest, p. 1505-1508
Paper in proceedings
2008
Modeling of dual-input power amplifiers
Thomas Eriksson, Christian Fager, Haiying Cao et al
Gigahertz Symposium 2008
Conference contribution
2008
Characterization of Switch Mode LDMOS and GaN Power Amplifiers for Optimal Use in Polar Transmitter Architectures
Hossein Mashad Nemati, Christian Fager, Ulf Gustavsson et al
Proc. IEEE International Microwave Symposium, p. 1505 - 1508
Paper in proceedings
2008
An efficiency optimized controlling scheme for dynamic load modulation of power amplifiers
Hossein Mashad Nemati, Christian Fager, Ulf Gustavsson et al
European Microwave Conf., Proc., Oct. 2008, p. 583-586
Paper in proceedings
2008
Orthonormal-basis power amplifier model reduction
Ali Soltani Tehrani, Haiying Cao, Thomas Eriksson et al
Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, 2008. INMMIC 2008., p. 39-42
Paper in proceedings
2008
Voltage/Current mode class D amplifiers and their applications
Christian Fager, Hossein Mashad Nemati, Ulf Gustavsson et al
Proc. IEEE Radio Wireless Symposium (Workshop: Transmitter Design for High Power Efficiency: The path from device to advanced system architectures)
Conference contribution
2008
Comparative analysis of the complexity/accuracy tradeoff for power amplifier behavior models
Ali Soltani Tehrani, Haiying Cao, Thomas Eriksson et al
Gigahertz Symposium 2008
Conference contribution
2008
On-wafer network analyser uncertainty estimation
Jörgen Stenarson, Kristoffer Andersson, Christian Fager et al
Proc. GigaHertz 2008
Conference contribution
2007
Design of highly efficient, high output power, L-band class D-1 RF power amplifiers using GaN MESFET devices
Ulf Gustavsson, T. Lejon, Christian Fager et al
Proc. European Conference on Wireless Technologies, p. 371-374
Paper in proceedings
2007
Single stage CMOS Power Amplifier at 23 GHz
Hossein Mashad Nemati, Mattias Ferndahl, Christian Fager et al
Abstarct and presentation in Workshop: RF Measurement Technology, for State of the Art Production and Design
Conference contribution
2007
Modulated Switching Mode Power Amplifiers: A New Paradigm for the Power-Efficiency vs. Spectrum-Efficiency Trade-Off
J.C. Pedro, P Cabral, Christian Fager et al
Proc. European Microwave Conference - Workshop on Wireless transmitter design for future wireless systems
Conference contribution
2007
Polar/ET Transmitters: Non-Idealities and Practical Implementation Aspects
Christian Fager, J.C. Pedro, P. Cabral et al
Proc. European Microwave Conference - Workshop on Wireless transmitter design for future wireless systems
Conference contribution
2007
System Level Modelling of RF Power Amplifiers Based on Large-Signal Measurements
Christian Fager, P Lavrador, M Myslinski et al
Proc. European Microwave Integrated Circuits Conference, p. 131-134
Paper in proceedings
2007
Large Signal IMD Behaviour: Load Line and Bias
Christian Fager
Proc. European Microwave Conference - Short course on Device Level Linearization Techniques
Conference contribution
2007
60 GHz Single-Chip Front-End MMICs and Systems for Multi-Gbps Wireless Communication
Sten Gunnarsson, Camilla Kärnfelt, Herbert Zirath et al
IEEE Journal of Solid-State Circuits. Vol. 42 (5), p. 1143 - 1157
Journal article
2007
High Efficiency Modulation of Switched Mode LDMOS Power Amplifiers
Christian Fager, Ulf Gustavsson, Hossein Mashad Nemati et al
Proc. 11th International Symposium on Microwave and Optical Technology
Paper in proceedings
2006
Improvement of Oscilloscope Based RF Measurements by Statistical Averaging Techniques
Christian Fager, Kristoffer Andersson
IEEE MTT-S International Microwave Symposium Digest, p. 1460-1463
Paper in proceedings
2006
Modelling of LDMOSFET and GaN devices (invited)
Christian Fager, N.B. Carvalho
Proc. European Microwave Conference - Workshop on RF Device Modelling
Conference contribution
2006
Statistical estimation of the propagation constant in multiline calibrations
Kristoffer Andersson, Christian Fager
67th ARFTG conference
Paper in proceedings
2006
High Efficiency LDMOS Current Mode Class-D Power amplifier at 1 GHz
Hossein Mashad Nemati, Christian Fager, Herbert Zirath
36th European Microwave Conference. Vol. 1 (1), p. 176-9
Paper in proceedings
2006
Single-Chip 60 GHz Transmitter and Receiver MMICs in a GaAs mHEMT Technology
Sten Gunnarsson, Camilla Kärnfelt, Herbert Zirath et al
Proceedings of IEEE MTT-S International Microwave Symposium, 11-16 June, 2006, p. 801-804
Paper in proceedings
2006
Modelling of LDMOSFET and GaN devices
Christian Fager, N.B. Carvalho
Proc. European Microwave Conference - Workshop on RF Device Modelling
Conference contribution
2005
Understanding and prediction of IMD behaviour in power amplifiers
Christian Fager
Characterization and Modelling Approaches for Advanced Linearisation Techniques / Garcia, J.A., Sainz de la Maza, J.M.Z
Book chapter
2005
Systems and Applications for Broadband Wireless Communication in the 60 GHz band
Christian Fager, Sten Gunnarsson, A. Alping et al
GigaHertz 2005. Vol. 1 (1), p. 175-80
Paper in proceedings
2005
Equivalent circuit modeling of LDMOS transistors
Christian Fager
TARGET Winter School: RF device characterisation and modelling / Langer, E., Mayer, M.
Conference contribution
2005
Understanding and accurate modelling of nonlinear LDMOS transistor dc characteristics
Christian Fager, K.-H. Eklund, Herbert Zirath
GigaHertz 2005. Vol. 1 (1), p. 181-4
Paper in proceedings
2005
Single-Chip 60 GHz Transmitter and Receiver MMICs for Very High Speed (several Gigabit/s) Wireless Transmission
Sten Gunnarsson, Camilla Kärnfelt, Herbert Zirath et al
GigaHertz 2005
Conference contribution
2005
Highly Integrated 60 GHz Transmitter and Receiver MMICs in a GaAs pHEMT Technology
Sten Gunnarsson, Camilla Kärnfelt, Herbert Zirath et al
IEEE Journal of Solid-State Circuits
Journal article
2005
A general procedure for extraction of bias dependent dynamic self heating model parameters
Kristoffer Andersson, Christian Fager, J.C. Pedro
Microwave Symposium Digest, 2005 IEEE MTT-S International, p. 1159-1162
Paper in proceedings
2004
Statistical Estimation of small signal FET model parameters and their covariance
Kristoffer Andersson, Christian Fager, Peter Linner et al
IEEE MTT-S International Microwave Symposium
Paper in proceedings
2004
Linearity versus efficiency in mobile handset power amplifiers: A battle without a loser
J.C. Pedro, N.B. Carvalho, Christian Fager et al
Microwave Engineering Europe (Aug/Sept), p. 19-26
Magazine article
2004
A comprehensive analysis of IMD behavior in RF CMOS power amplifiers
Christian Fager, Jose C. Pedro, Nuno Carvalho et al
IEEE Journal of Solid-State Circuits. Vol. 39 (1), p. 24-34
Journal article
2004
Optimization of power amplifier transfer characteristics
Christian Fager, Herbert Zirath
European Microwave Conference, p. 1325-28
Paper in proceedings
2002
Optimal parameter extraction and uncertainty estimation in intrinsic FET small-signal models
Christian Fager, Peter Linner, J.C. Pedro
IEEE Transactions on Microwave Theory and Techniques. Vol. 50 (Dec.), p. 2797-803
Journal article
2002
Intermodulation distortion behavior in LDMOS transistor amplifiers
Christian Fager, J.C. Pedro, N. Borges et al
IEEE MTT-S International Microwave Symposium. Vol. 1, p. 131-4
Paper in proceedings
2002
Prediction of IMD in LDMOS transistor amplifiers using a new large-signal model
Christian Fager, J.C. Pedro, N.B. Carvalho et al
IEEE Transactions on Microwave Theory and Techniques. Vol. 50 (Dec.), p. 2834-42
Journal article
2002
Uncertainty estimation and optimal extraction of intrinsic FET small-signal model parameters
Christian Fager, Peter Linner, J.C. Pedro
IEEE MTT-S International Microwave Symposium. Vol. 2, p. 729-32
Paper in proceedings
2000
High output power, broadband 28-56 GHz MMIC frequency doubler
Christian Fager, Lars Landén, Herbert Zirath
IEEE MTT-S International Microwave Symposium / Perkins, T., p. 1589-91 vol.3
Paper in proceedings
Showing 9 research projects
2018–2020
gan-on-Silicon Efficient mm-wave euRopean systEm iNtegration plAtform (SERENA)
Christian Fager
Microwave Electronics
European Commission (Horizon 2020)
2017–2019
Compact Millimeter Wave Integration Concept for Future Wireless and Sensor Systems
Christian Fager
Microwave Electronics
VINNOVA
2017–2021
Smarta radiosändare för framtidens millimetervågssystem
Christian Fager
Microwave Electronics
Halil Volkan Hünerli
Microwave Electronics
Mattias Ferndahl
Microwave Electronics
Swedish Foundation for Strategic Research (SSF)
2016–2017
Compact Millimeter Wave Integration Concept for Future Wireless and Sensor Systems
Mattias Thorsell
Microwave Electronics
Christian Fager
Microwave Electronics
Niklas Rorsman
Microwave Electronics
Koen Buisman
Microwave Electronics
VINNOVA
2016–2018
Millimeter-wave Backhaul Links at above 100 Gbits/s - Taking smart antennas to the limits
Thomas Eriksson
Communication Systems
Christian Fager
Microwave Electronics
Koen Buisman
Microwave Electronics
Dhecha Nopchinda
Microwave Electronics
Marianna Ivashina
Antennas
Herbert Zirath
Microwave Electronics
Amina Piemontese
Communication Systems
VINNOVA
2016–2019
All-Digital Radio-over-Fiber: A New Radio Transmitter Architecture for Future Wireless Applications
Christian Fager
Microwave Electronics
Johan Gustavsson
Photonics
Ibrahim Can Sezgin
Microwave Electronics
Thomas Eriksson
Communication Systems
Swedish Research Council (VR)
2013–2017
Energy efficient millimeter wave transmitters
Christian Fager
Microwave Electronics
Niklas Rorsman
Microwave Electronics
Dan Kuylenstierna
Microwave Electronics
William Hallberg
Microwave Electronics
Herbert Zirath
Microwave Electronics
Mattias Thorsell
Microwave Electronics
VINNOVA
2012–2015
Modeling and Signal Design for Multiple Antenna Architectures
Thomas Eriksson
Communication Systems
Christian Fager
Microwave Electronics
Swedish Research Council (VR)
2011–2014
High efficiency electronic cooking systems (HEECS)
Christian Fager
Microwave Electronics
European Commission (FP7)
There might be more projects where Christian Fager participates, but you have to be logged in as a Chalmers employee to see them.