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Selected recent publications in International Journals and Conference Proceedings:


Journal Publications

W. Cao, and A. Zhu, "A Modified Decomposed Vector Rotation-Based Behavioral Model with Efficient Hardware Implementation for Digital Predistortion of RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 65, Issue 02, to appear, Feb. 2017. [Full Text] [pre-publishing version]

H. Wang, G. Li, C. Zhou, W. Tao, F. Liu, and A. Zhu, "1-bit Observation for Direct-Learning-Based Digital Predistortion of RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 65, Issue 02, to appear, Feb. 2017. [Full Text] [pre-publishing version]

P. Chen, J. Xia, B. M. Merrick, and T. J. Brazil, "Multiobjective Bayesian Optimization for Active Load Modulation in a Broadband 20-W GaN Doherty Power Amplifier Design," IEEE Transactions on Microwave Theory and Techniques, Vol. 65, Issue 01, to appear, Feb. 2017. [Full Text] [pre-publishing version]

N. Kelly, W. Cao, and A. Zhu, "Preparing Linearity and Efficiency for 5G: Digital Predistortion for Dual-Band Doherty Power Amplifiers with Mixed-Mode Carrier Aggregation," IEEE Microwave Magazine, Vol. 18, Issue 01, pp. 76-84, Jan. 2017. [Full Text] [pre-publishing version]

J. Xia, M. Yang, and A. Zhu, "Improved Doherty Amplifier Design with Minimum Phase Delay in Output Matching Network for Wideband Application," IEEE Microwave and Wireless Components Letters, Vol. 26, Issue 11, pp. 915-917, Nov. 2016. [Full Text] [pre-publishing version]

G. Huang, C. Yu, and A. Zhu, "Analog Assisted Multichannel Digital Post-Correction for Time-Interleaved ADCs," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 63, Issue 8, pp. 773-777, Aug. 2016 [Full Text][pre-publishing version]

S. Liu, N. Lv, H. Ma, and A. Zhu, "Adaptive semiblind background calibration of timing mismatches in a two-channel time-interleaved analog-to-digital converter," Analog Integrated Circuits and Signal Processing, online access, Aug. 2016. [Full Text]

J. Xia, M. Yang, Y. Guo, and A. Zhu, "A Broadband High-Efficiency Doherty Power Amplifier with Integrated Compensating Reactance," IEEE Transactions on Microwave Theory and Techniques, Vol. 64, Issue 07,pp.2014-2024, Jul. 2016. [Full Text] [pre-publishing version]

M. Yang, J. Xia, Y. Guo, and A. Zhu, "Highly Efficient Broadband Continuous Inverse Class-F Power Amplifier Design Using Modified Elliptic Low-Pass Filtering Matching Network," IEEE Transactions on Microwave Theory and Techniques, Vol. 64, Issue 05, pp. 1515 - 1525, May 2016. [Full Text] [pre-publishing version]

N. Kelly and A. Zhu, "Low Complexity Stochastic Optimization-Based Model Extraction for Digital Predistortion of RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 64, Issue 05, pp. 1373 - 1382, May 2016. [Full Text] [pre-publishing version]

C. Yu, W. Cao, Y. Guo, and A. Zhu, "Digital Compensation for Transmitter Leakage in Non-contiguous Carrier Aggregation Applications with FPGA Implementation," IEEE Transactions on Microwave Theory and Techniques, Vol. 63, Issue 12, pp. 4306-4318, Dec. 2015. [Full Text] [pre-publishing version]

P. Chen, B. M. Merrick, and T. J. Brazil, "Bayesian Optimization for Broadband High-Efficiency Power Amplifier Designs," IEEE Transactions on Microwave Theory and Techniques, Vol. 63, Issue 12, pp.4263-4272, Dec. 2015. [Full Text][pre-publishing version]

Y. Guo, C. Yu, and A. Zhu, "Power Adaptive Digital Predistortion for Wideband RF Power Amplifiers With Dynamic Power Transmission," IEEE Transactions on Microwave Theory and Techniques, Vol. 63, Issue 11, pp. 3595 - 3607, Nov. 2015. [Full Text][pre-publishing version]

B. Merrick, J. King, and T. J. Brazil, "The Continuous Harmonic-Tuned Power Amplifier," IEEE Microwave and Wireless Components Letters, Vol. 25, Issue 11, pp. 736-738, Nov. 2015. [Full Text][pre-publishing version]

Y. Wang, S. Liu, and T. J. Brazil, "Discrete-Time Representation of Band-Pass S-Parameter Data," IEEE Microwave and Wireless Components Letters, Vol. 25, Issue 11, pp. 697-699, Nov. 2015. [Full Text]

C. Yu, J. Xia, X. Zhu, and A. Zhu, "Single-Model Single-Feedback Digital Predistortion for Concurrent Multi-band Wireless Transmitters," IEEE Transactions on Microwave Theory and Techniques, Vol. 63, Issue 07, pp. 2211-2224, Jul. 2015. [Full Text] [pre-publishing version]

N. Kelly, M. Allegue-Martinez, P.-D. Arapoglou, and A. Zhu, "Bandwidth-Constrained Digital Pre-compensation Technique for Multi-carrier Satellite Communications," International Journal of Satellite Communications and Networking, Jul. 2015. [Full Text][pre-publishing version]

J. Cai, J. King, A. Zhu, J. C. Pedro, and T. J. Brazil, "Nonlinear Behavioral Modeling Dependent on Load Reflection Coefficient Magnitude," IEEE Transactions on Microwave Theory and Techniques, Vol. 63, Issue 05, pp.1518-1529, May 2015. [Full Text]

A. Zhu, "Decomposed Vector Rotation-Based Behavioral Modeling for Digital Predistortion of RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 63, Issue 02, pp. 737-744, Feb. 2015. [Full Text][pre-publishing version]

C. Yu, M. Allegue-Martinez, Y. Guo, and A. Zhu, "Output-Controllable Partial Inverse Digital Predistortion for RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 62, Issue 11, pp. 2499-2510, Nov. 2014. [Full Text] [pre-publishing version]

L. Guan and A. Zhu, "Green Communications: Digital Predistortion for Wideband RF Power Amplifiers," IEEE Microwave Magazine, Vol. 15, Issue 07, pp. 84-99, Nov.-Dec. 2014. [Full Text]

J. Cai, J. King, and T. J. Brazil, "An Improved Quadratic Poly-Harmonic Distortion Behavioral Model," International Journal of Microwave and Wireless Technologies, 9 pages, Aug. 2014. [Full Text]

J. Cai and T. J. Brazil, "Reduced-complexity Polynomial Based Nonlinear Behavioral Modeling," IEEE Microwave and Wireless Components Letters, Vol. 24, Issue 07, pp. 496-498, Jul. 2014. [Full Text]

M. Allegue-Martinez, N. Kelly, and A. Zhu, "Digital linear pre-compensation technique to enhance predistortion performance in multicarrier DVB-S2 satellite communication systems," IET Electronics Letters, Vol. 50, Issue 13, pp. 957-959, Jun. 2014. [Full Text]

J. Cai, J. B. King, B. M. Merrick, and T. J. Brazil, "Pade-Approximation-Based Behavioral Modelling," IEEE Transactions on Microwave Theory and Techniques, Vol. 61, Issue 12, pp. 4418-4427, Dec. 2013. [Full Text]

L. Guan, R. Kearney, C. Yu, and A. Zhu, "High Performance Digital Predistortion Test Platform Development for Wideband RF Power Amplifiers," International Journal of Microwave and Wireless Technologies, Vol. 5, Issue 02, pp. 149-162, Apr. 2013. [Full Text PDF ]

J. King and T. J. Brazil, "Nonlinear Electrothermal GaN HEMT Model Applied to High-Efficiency Power Amplifier Design," IEEE Transactions on Microwave Theory and Techniques, Vol. 61, pp. 444-454, Jan. 2013. [Full Text PDF ]

T. J. Brazil, "Time-Domain Techniques in Microwave Circuit Simulation," IET Microwaves Antennas & Propagation, Vol. 7, pp. 146-155, Jan. 2013. [Full Text]

C. Yu, L. Guan, E. Zhu, and A. Zhu, "Band-Limited Volterra Series-Based Digital Predistortion for Wideband RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 60, pp. 4198-4208, December 2012. [Full Text PDF ]

C. Yu, and A. Zhu, "A Single Envelope Modulator-Based Envelope-Tracking Structure for Multiple-Input and Multiple-Output Wireless Transmitters," IEEE Transactions on Microwave Theory and Techniques, Vol. 60, pp. 3317-3327, October 2012. [Full Text PDF ]

N. Tuffy, L. Guan, A. Zhu, and T. J. Brazil, "A Simplified Broadband Design Methodology for Linearized High Efficiency Continuous Class-F Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 60, pp.1952-1963, June 2012. [Full Text PDF ]

L. Guan, and A. Zhu, "Optimized Low-Complexity Implementation of Least Squares-Based Model Extraction for Digital Predistortion of RF Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 60, pp. 594-603, March 2012. [Full Text PDF ]

C. Hsia, A. Zhu, J. J. Yan, P. J. Draxler, D. F. Kimball, S. Lanfranco, and P. M. Asbeck, "Digitally-Assisted Dual-Switch High Efficiency Envelope Amplifier for Envelope Tracking Base-Station Power Amplifiers," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, pp. 2943-2952, November 2011. [Full Text PDF ]

L. Guan, and A. Zhu, “Dual-loop Model Extraction for Digital Predistortion of Wideband RF Power Amplifiers,” IEEE Microwave and Wireless Components Letters, Vol. 21, pp 501-503, September 2011. [Full Text PDF (350KB)]

L. Guan, and A. Zhu, “Gaussian Pulse-Based Two-Threshold Parallel Scaling Tone Reservation for PAPR Reduction of OFDM Signals," International Journal of Digital Multimedia Broadcasting, Article ID 470310, 9 pages, April 2011. [Full Text PDF (1300KB)]

L. Guan, and A. Zhu, “Low-Cost FPGA Implementation of Volterra Series-Based Digital Predistorter for RF Power Amplifiers,” IEEE Transactions on Microwave Theory and Techniques, Vol. 58, pp.866 - 872, April 2010.[Full Text PDF (479KB)]

J. Wang, A. Zhu, X. Zhu, and T. J. Brazil, “Vector Hole Punching Technique for OFDM Signals Using Circle-Tangent Shift and Unused Tones,” IEEE Transactions on Microwave Theory and Techniques, Vol. 57, pp. 2682-2691, November 2009.[Full Text PDF (2001KB)]

Z. Su, and T. J. Brazil, "Direct Incorporation of Scattering Parameters Into the FDTD Algorithm," IEEE Transactions on Antennas and Propagation, Vol. 57, pp. 1186-1190, April 2009.[Full Text PDF (281KB)]

J. A. García, J. C. Pedro, P. M. Cabral, C. Fager, H. M. Nemati, A. Zhu, and P. Colantonio, "Nonideality Sources and Implementation Considerations in Polar Transmitters," International Journal of Microwave and Wireless Technologies, Vol. 1, No. 2, pp. 109-116, April 2009.

A. Zhu, P. J. Draxler, C. Hsia, T. J. Brazil, D. F. Kimball, and P. M. Asbeck, “Digital Predistortion for Envelope-Tracking Power Amplifiers Using Decomposed Piecewise Volterra Series,” IEEE Transactions on Microwave Theory and Techniques, Vol. 56, pp. 2237-2247, October 2008.[Full Text PDF (1573KB)]

A. Zhu, P. J. Draxler, J. J. Yan, T. J. Brazil, D. F. Kimball, and P. M. Asbeck, “Open-Loop Digital Predistorter for RF Power Amplifiers Using Dynamic Deviation Reduction-Based Volterra Series,” IEEE Transactions on Microwave Theory and Techniques, Vol. 56, pp. 1524-1534, July 2008.[Full Text PDF (1583KB)]

R. G. Brady, C. H. Oxley, and T. J. Brazil, "An Improved Small-Signal Parameter-Extraction Algorithm for GaN HEMT Devices," IEEE Transactions on Microwave Theory and Techniques, Vol.56, pp.1535-1544, July 2008.[Full Text PDF (1041KB)]

T. J. Brazil, "The Modelling and Simulation of High-Frequency Electronic Circuits", International Journal of Circuit Theory and Applications (Wiley), Vol.35, pp.533-546, September-December 2007.[Full Text PDF (256KB)]

A. Zhu, J. C. Pedro, and T. R. Cunha, “Pruning the Volterra Series for Behavioral Modeling of Power Amplifiers Using Physical Knowledge”, IEEE Transactions on Microwave Theory and Techniques, Vol. 55, pp. 813-821, May 2007.[Full Text PDF (696KB)]

A. Zhu, J. C. Pedro, and T. J. Brazil, “Dynamic Deviation Reduction-Based Volterra Behavioral Modeling of RF Power Amplifiers”, IEEE Transactions on Microwave Theory and Techniques, Vol. 54, pp. 4323-4332, December 2006. [Full Text PDF (726KB)]

I. Kallfass, H. Schumacher, and T. J. Brazil, “A Unified Approach to Charge-Conservative Capacitance Modelling in HEMTs", IEEE Microwave and Wireless Components Letters, Vol. 16, pp. 678-680, December 2006. [Full Text PDF (122KB)]

I. Kallfass, H. Schumacher, and T. J. Brazil, “Multiple time constant modeling of dispersion dynamics in hetero field-effect transistors”, IEEE Transactions on Microwave Theory and Techniques, Vol. 54, pp. 2312-2320, June 2006. [Full Text PDF (612KB)]

C. Devlin, T. Brazil, and G. Magerl, “TARGET network: microwave power amplifiers”, IEEE Microwave Magazine, Vol. 7, pp. 34-48, April 2006. [Full Text PDF (2788KB)]

M. O’Droma, E. Bertran, J. Portilla, N. Mgebrishvili, S. Donati Guerrieri, G. Montoro, T. J. Brazil and G. Magerl, “On the linearization of microwave transmitter solid-state power amplifiers”, Int. J. RF and Microwave CAE (Wiley), Vol. 15., pp.491-505, Sept. 2005.[Full Text PDF (664KB)]

M. Wren, and T. J. Brazil, “Experimental Class F power amplifier design using Computationally Efficient and Accurate Large Signal pHEMT Model”, IEEE Transactions on Microwave Theory and Techniques, Vol. 53, pp. 1723-1731, May 2005. [Full Text PDF (536KB)]

A. Zhu, and T. J. Brazil, “Behavioral modeling of RF power amplifiers based on pruned Volterra Series”, IEEE Microwaves and Wireless Components Letters, Vol. 14, pp. 563-565, December 2004. [Full Text PDF (180KB)]

I. Kallfass, T. J. Brazil, B. OhAnnaidh, et al, “Large-signal modelling including low-frequency dispersion of n-channel SiGe MODFETs and MMIC applications”, Solid-State Electronics, Vol. 48, pp. 1433-1441, August 2004. [Full Text PDF (557KB)]

B. OhAnnaidh, and T. J. Brazil, “An accurate nonlinear MOSFET model for intermodulation distortion analysis”, IEEE Microwave and Wireless Components Letters, Vol. 14, pp. 352-354, July 2004. [Full Text PDF (256KB)]

T. Wang. and T. J. Brazil, “Volterra Mapping Based Behavioural Modelling of Nonlinear Circuits and Systems for High Frequencies”, IEEE Transactions on Microwave Theory and Techniques, Vol. MTT-51, pp. 1433-440, May 2003. [Full Text PDF (615KB)]

T. J. Brazil, “Simulating Devices and Circuits (Invited Paper)”, IEEE Microwave Magazine, Vol. 4, pp. 42-50, March 2003. [Full Text PDF (1930KB)]

Conference Publications

A. Zhu, "Behavioral Modeling for Digital Predistortion of RF Power Amplifiers: from Volterra Series to CPWL Functions (invited)," IEEE Topical Conference on RF/microwave Power Amplifiers for Wireless and Radio Applications (PAWR), Austin, Texas, Jan. 2016.

Y. Guo, C. Yu, and A. Zhu, "Simplified Online Coefficients Updating for Digital Predistortion of Wideband/Multi-band RF Power Amplifiers," 2015 Asia-Pacific Microwave Conference (APMC), Nanjing, China, Dec. 2015.

M. Yang, J. Xia, and A. Zhu, "A 1.8-2.3 GHz Broadband Doherty Power Amplifier with a Minimized Impedance Transformation Ratio," 2015 Asia-Pacific Microwave Conference (APMC), Nanjing, China, Dec. 2015.

C. Yu, X. Zhu, and A. Zhu, "Digital Predistortion for Wideband Wireless Transmitters with Carrier Aggregation (invited)," 2015 Asia-Pacific Microwave Conference (APMC), Nanjing, China, Dec. 2015.

N. Kelly and A. Zhu, "A Modified Simultaneous Perturbation Stochastic Optimization Algorithm for Digital Predistortion Model Extraction," The International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC), Taormina, Italy, Oct. 2015. [Full Text]

Y. Guo, C. Yu, and A. Zhu, "Simplified Power Adaptive Digital Predistorter for RF Power Amplifiers in Dynamic Power Transmission," The 10th European Microwave Integrated Circuits Conference (EuMIC), Paris, France, Sep. 2015. [Full Text]

G. Huang, B. Peng, and A. Zhu, "Simplified Volterra Series Based Background Calibration for High Speed High Resolution Pipelined ADCs," IEEE 58th International Midwest Symposium on Circuits and Systems, Fort Collins, Colorado, USA, Aug. 2015. [Full Text]

W. Cao, C. Yu, and A. Zhu, "Digital post-correction of analog-to-digital converters with real-time FPGA implementation," The 26th Irish Signals and Systems Conference (ISSC), Carlow, Ireland, Jun. 2015. [Full Text]

P. Chen and T. J. Brazil, "Gaussian processes regression for optimizing harmonic impedance trajectories in continuous class-F power amplifier design," IEEE MTT-S International Microwave Symposium (IMS), Phoenix, AZ, USA, May 2015. [Full Text]

C. Yu and A. Zhu, "Modeling and Suppression of Transmitter Leakage in Concurrent Dual-band Transceivers with Carrier Aggregation," IEEE MTT-S International Microwave Symposium (IMS), Phoenix, AZ, USA, May 2015. [Full Text]

J. Cai, M. Yang, A. Zhu, and T. J. Brazil, "|Γ|-dependent Polynomial Behavioral Model for RF Power Transistors," IEEE MTT-S International Microwave Symposium (IMS) Phoenix, AZ, USA, May 2015. [Full Text]

N. Kelly, M. Allegue-Martinez, and A. Zhu, "Bandwidth-Constrained Digital Predistortion for Multi-carrier Transparent Satellite Payloads," The 32nd AIAA International Communications Satellite Systems Conference , San Diego, USA, Aug. 2014. [Full Text]

C. Yu and A. Zhu, "Single Feedback Loop-Based Digital Predistortion for Linearizing Concurrent Multi-band Transmitters," IEEE MTT-S International Microwave Symposium (IMS), Tampa, FL, USA, Jun. 2014. [Full Text]

Y. Guo, C. Yu, and A. Zhu, "Power adaptive digital predistortion for RF power amplifiers," IEEE MTT-S International Microwave Symposium (IMS), Tampa, FL, USA, Jun. 2014. [Full Text]

B. Merrick, J. King, and T. J. Brazil, "A wideband sequential Power amplifier," IEEE MTT-S International Microwave Symposium (IMS), Tampa, FL, USA, Jun. 2014. [Full Text]

T. J. Brazil, "The time-domain paradigm in microwave nonlinear simulation," IEEE 15th Annual Wireless and Microwave Technology Conference (WAMICON), Tampa, FL, USA, Jun. 2014. [Full Text]

T. J. Brazil, "Nonlinear Transient Simulation of mixed EM/circuit-level system blocks," The International Conference on Numerical Electromagnetic Modeling and Optimization for RF Microwave and Terahertz Applications (NEMO), Pavia, Italy, May 2014. [Full Text]

C. Yu, M. Allegue-Martinez, and A. Zhu, "Frequency component controllable digital predistortion of RF power amplifiers," The International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC), Leuven, Belgium, Apr. 2014. [Full Text]

Y. Wang and T. J. Brazil, "A comparison between discrete-time and vector fitting representations of S-parameter data," The International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC), Leuven, Belgium, Apr. 2014. [Full Text]

J. Cai, B. M. Merrick, and T. J. Brazil, "Application of load-independent Pade model on power amplifier design," The International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC), Leuven, Belgium, Apr. 2014. [Full Text]

C. Yu, Y. Guo, and A. Zhu, "A band-limited 2-D digital predistorter for concurrent dual-band RF transmitters," IEEE MTT-S International Wireless Symposium (IWS) Xi'An, China, Mar. 2014. [Full Text]

N. Kelly, A. Zhu, and T. J. Brazil, "Digital Predistortion Feasibility Studies for Multicarrier Satellite Communication Systems," The 31st AIAA International Communications Satellite Systems Conference (ICSSC), Florence, Italy, Oct. 2013. [Full Text]

B. Merrick, J. King, and T. J. Brazil, "A Simplified Procedure for the Design of Continuous Class-F Power Amplifiers," The 8th European Microwave Integrated Circuits Conference (EuMIC), Nuremburg, Germany, Oct. 2013. [Full Text]

J. Cai and T. J. Brazil, "Pade-approximation-Based Behavioral Modelling," IEEE MTT-S International Microwave Symposium (IMS), Seattle, WA, USA, Jun. 2013. [Full Text]

J. Cai and T. J. Brazil, "Compact Behavioral Description for Generalised Loads using a Modified X-Parameter Model," IEEE MTT-S International Wireless Symposium (IWS), Beijing, China, Apr. 2013. [Full Text]

J. Cai and T. J. Brazil, "X-parameter-based frequency doubler design," The 42nd European Microwave Conference, Amsterdam, Netherlands, Oct. 2012. [Full Text]

J. King and T. J. Brazil, "A GaN HEMT Equivalent Circuit Model with Novel Approach to Dispersion Modelling," The 7th European Microwave Integrated Circuits Conference, (EuMIC), Amsterdam, Netherlands, Oct. 2012. [Full Text]

L. Guan, Y. Chao, and A. Zhu, "Bandwidth-constrained Least Squares-based Model Extraction for Band-limited Digital Predistortion of RF Power Amplifiers," The International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Dublin, Ireland, September 2012. [Full Text PDF ]

B. Merrick and T. J. Brazil, "Analysis of the Integration of Envelope Tracking with Continuous Class F Amplifiers," The International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Dublin, Ireland, September 2012. [Full Text]

"An Analytical Approach to Obtaining Optimum Load Impedance Using X-Parameters," The International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Dublin, Ireland, September 2012. [Full Text]

C. Yu, L. Guan, and A. Zhu, "Band-limited Volterra Series-based Behavioral Modeling of RF Power Amplifiers," The IEEE MTT-S International Microwave Symposium, Montreal, Canada, June 2012. [Full Text PDF ]

J. King and T. J. Brazil, "A comprehensive electrothermal GaN HEMT model including nonlinear thermal effects," The IEEE MTT-S International Microwave Symposium, Montreal, Canada, June 2012. [Full Text]

T. Ballal, R. B. Shouldice, C. Heneghan, and A. Zhu, "Breathing Rate Estimation from a Non-Contact Biosensor Using an Adaptive IIR Notch Filter," The 2nd Annual IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS), Santa Clara, USA, January 2012. [Full Text PDF ]

J. King and T. J. Brazil, "Equivalent circuit GaN HEMT model accounting for gate-lag and drain-lag transient effects," The IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications (PAWR), Santa Clara, USA, January 2012. [Full Text]

N. Tuffy, A. Zhu, and T. J. Brazil, "Novel Realisation of a Broadband High-efficiency Continuous Class-F Power Amplifier," The 6th European Microwave Integrated Circuits Conference (EuMIC), Manchester, UK, October 2011. [Full Text PDF ]

N. Tuffy, A. Zhu,and T. J. Brazil, “Class-J RF Power Amplifier with Wideband Harmonic Suppression," The IEEE MTT-S International Microwave Symposium, Baltimore, MD, June, 2011. [Full Text PDF (607KB)].

N. Tuffy, A. Zhu,and T. J. Brazil, “Class-J RF Power Amplifier with Wideband Harmonic Suppression," The IEEE MTT-S International Microwave Symposium, Baltimore, MD, June, 2011. [Full Text PDF (607KB)].

L. Guan, and A. Zhu, “Simplified Dynamic Deviation Reduction-based Volterra Model for Doherty Power Amplifiers," 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC), Vienna, Austria, April, 2011. [Full Text PDF (277KB)]

I. Braz, L. Guan, A. Zhu,and T. J. Brazil, “PAPR Reduction Technique Using Unused Subcarriers for SFBC-based MIMO-OFDM Systems," The 3rd European Wireless Technology Conference, Paris, France, September 2010. [Full Text PDF (307KB)]

I. Braz, L. Guan, A. Zhu,and T. J. Brazil, “Peak-to-Average Power Ratio Reduction of SFBC MIMO-OFDM Signals Using Unused Tone," IEEE International Microwave Workshop Series on "RF Front-ends for Software Defined and Cognitive Radio Solutions, Aveiro, Portugal, February, 2010.

Z. Su, and T. J. Brazil, “Broadband Characterization of Microstrip Launcher Structures through a Single Measurement”, The European Microwave Conference 2009, Rome, Italy, September 2009.

T. J. Brazil,” Collaborative Research in Microwaves in Europe (Invited Paper)”, The 10th IEEE Wireless and Microwave Technology Conference, Clear Water, FL, USA, April 2009.

T. J. Brazil, “An Overview of Behavioral Modeling for Microwave Power Amplifiers”, The 10th IEEE Wireless and Microwave Technology Conference, Clear Water, FL, USA, April 2009.

J. Wang, A. Zhu, X. Zhu, and T. J. Brazil, “Vector Hole Punching of OFDM Signals for Polar Transmitters”, The IEEE Topical Symposium on Microwave Power Amplifiers 2009, San Diego, USA, January 2009.

P. J. Draxler, A. Zhu, J. J. Yan, P. Kolinko, D. F. Kimball, and P. M. Asbeck, “Quantifying Distortion of RF Power Amplifiers for Estimation of Predistorter Performance”, in IEEE MTT-S International Microwave Symposium Digest, Atlanta, GA, USA, June 2008. [Full Text PDF (445KB)]

C. Devlin, A. Zhu, and T. J. Brazil, “PAPR Reduction Technique for OFDM Signals Using Unused Tones with Phase Information”, The IEEE International Conference on Circuits and Systems for Communications, Shanghai, China, May 2008.[Full Text PDF (290KB)]

C. Devlin, A. Zhu, and T. J. Brazil, “Peak to Average Power Ratio Reduction Technique for OFDM Using Pilot Tones and Unused Carriers”, The IEEE Radio and Wireless Symposium, Orlando, FL, USA, January 2008.[Full Text PDF (283KB)]

C. Devlin, J. S. Kenney, A. Zhu, and T. J. Brazil, "Peak to Average Power Ratio (PAPR) Reduction Technique for OFDM in Polar Transmitters with a Sigma Delta Modulator" , The IEEE Topical Symposium on Power Amplifiers for Wireless Communications, Orlando, FL, USA, January 2008.

C. Fager, P. M. Lavrador, M. Myslinski, A. Zhu, H. M. Nemati, J. C. Pedro, and D. Schreurs, “System Level Modelling of RF Power Amplifiers Based on Large-Signal Measurements”, in Proc. of the 2nd European Microwave Integrated Circuits Conference, Munich, Germany, October 2007.[Full Text PDF (507KB)]

A. Zhu, and J. C. Pedro, “Distortion Evaluation of RF Power Amplifiers Using Dynamic Deviation Reduction Based Volterra Series”, the IEEE MTT-S International Microwave Symposium Digest, pp. 965-968, Honolulu,HI, June 2007. [Full Text PDF (304KB)]

T. R. Cunha, J. C. Pedro, P. M. Cabral, and A. Zhu, “General Nonlinear Feed-forward RF Model for Power Amplifiers”, the IEEE MTT-S International Microwave Symposium Digest, pp. 2027-2030, Honolulu,HI, June 2007. [Full Text PDF (414KB)]

D. R. Burke, M. E. Kaamouchi, D. Vanhoenacker-Janvier, and T. J. Brazil, “DC and Large-Signal Microwave MOSFET Model Applicable to Partially-Depleted, Body-Contacted SOI Technology”, the IEEE MTT-S International Microwave Symposium Digest, pp. 585-588, Honolulu,HI, June 2007. [Full Text PDF (472KB)]

R. G. Brady, G. Rafael-Valdivia, and T. J. Brazil, “Large-Signal FET Modeling based on Pulsed Measurements”, the IEEE MTT-S International Microwave Symposium Digest, pp. 593-596, Honolulu,HI, June 2007. [Full Text PDF (346KB)]

Z. Su, and T. J. Brazil, “Transient Model Using Cascaded Ideal Transmission Lines for UWB Antennas for Co-simulation with Circuits”, the IEEE MTT-S International Microwave Symposium Digest, pp. 2035-2038, Honolulu,HI, June 2007. [Full Text PDF (446KB)]

C. Devlin, A. Zhu, and T. J. Brazil, “Gaussian Pulse Based Tone Reservation for Reducing PAPR of OFDM Signals”, in Proc. of the IEEE 65th Vehicular Technology Conference, Dublin, Ireland, April, 2007. [Full Text PDF (238 KB)]

A. Zhu, and T. J. Brazil, “An Overview of Volterra Series Based Behavioral Modeling of RF/Microwave Power Amplifiers (Invited)”, The 8th annual IEEE Wireless and Microwave Technology (WAMICON) Conference, Clearwater, FL, Dec. 2006.[Full Text PDF (5761KB)]

T. J. Brazil, and G. Magerl, “Achievements of European Research Cooperation in Microwave Amplifiers in the TARGET Network (Invited)”, The 8th annual IEEE Wireless and Microwave Technology (WAMICON) Conference, Clearwater, Fl, USA, Dec. 2006.

Z. Su, A. Zhu, and T. J. Brazil, “Transient Analysis Model for Co-Simulation of UWB Antennas and Nonlinear Circuits”, in Proc. of the 2006 China-Ireland International Conference on Information and Communications Technologies, pp. 266-269, Hangzhou, China, October 2006.

G. Rafael-Valdivia, R. Brady, and T. J. Brazil, "Drain Current Model for MESFETHEMT Devices Including Low-Frequency Dispersion and Memory Effects",in Proc. of the 2006 China-Ireland International Conference on Information and Communications Technologies, pp. 266-269, Hangzhou, China, October 2006.

B. O’Brien, J. Dooley, A. Zhu, and T. J. Brazil, “Estimation of Memory Length for RF Power Amplifier Behavioral Models”, in Proc. of the European Microwave Conference, Manchester, September 2006.

G. Rafael-Valdivia, R. Brady, and T. J. Brazil,"New drain current model for MESFET/HEMT devices based on pulsed measurements", in Proc. of the European Microwave Integrated Circuits Conference 2006, pp. 289-291, Manchester, September 2006.

A. Zhu, J. Dooley, and T. J. Brazil, “Simplified Volterra Series Based Behavioral Modeling of RF Power Amplifiers Using Deviation-Reduction”, IEEE MTT-S International Microwave Symposium Digest, pp. 1113-1116, San Francisco, CA, June 2006. [Full Text PDF (241KB)]

J. Dooley, B. O’Brien, and T. J. Brazil, "Behavioral Modeling of RF Power Amplifiers Using Adaptive Recursive Polynomial Functions", IEEE MTT-S International Microwave Symposium Digest, pp. 852-855, San Francisco, CA, June 2006. [Full Text PDF (354KB)]

B. O’Brien, J. Dooley, and T. J. Brazil, "RF Power Amplifier Behavioral Modeling using a Globally Recurrent Neural Network", IEEE MTT-S International Microwave Symposium Digest, pp. 1089-1092, San Francisco, CA, June 2006.[Full Text PDF (302KB)]

G. Rafael-Valdivia, R. Brady, and T. J. Brazil, "Single function drain current model for MESFET/HEMT devices including pulsed dynamic behavior", IEEE MTT-S International Microwave Symposium Digest, pp. 437-440, San Francisco, CA, June 2006. [Full Text PDF (279KB)]

C. Devlin, A. Zhu, and T. J. Brazil, “Reduction of the Peak-to-average Power Ratio (PAPR) of OFDM Signals Using Tone Reservation with Gaussian Pulses”, The IEEE Topical Workshop on Power Amplifiers for Wireless Communications, San Diego, CA, January 2006.

E. Bertran, M. O’Droma, J. Portilla, S. Donati, T. J. Brazil, and G. Magerl, “Suitability Of Power Amplifier Linearising Structures For New BWA and WPAN Systems”, Proceedings of APMC 2005, SuZhou, P.R. China, pp. 78-81, December 2005.

Magerl G. and T. J. Brazil, (Invited Paper) “TARGET – Co-ordinated Power Amplifier Research in Europe”, Proceedings of APMC2005, SuZhou, P.R. China, pp. 34-37, December 2005.

D. R. Burke. and T. J. Brazil, “A New Non-Quasi-Static Non-linear MOSFET Model Based on Physical Analysis”, Proceedings of the 13th Gallium Arsenide and other Compound Semiconductors Application Symposium, pp. 301-304, Paris, October 2005. [Full Text PDF (279KB)]

D. ÓhAnnaidh, and T. J. Brazil, “Time-Domain Non-Linear Noise Analysis of FET Oscillators”, Proceedings of the 35th European Microwave Conference, pp. 1141-1144, Paris, October 2005. [Full Text PDF (203KB)]

A. Zhu, and T. J. Brazil, “RF Power Amplifiers Behavioral Modeling Using Volterra Expansion with Laguerre Functions”, IEEE MTT-S International Microwave Symposium Digest, WE4D-1, Long Beach, June 2005. [Full Text PDF (150KB)]

T. J. Brazil, “Highly Accurate Incorporation of Frequency-Domain Data within Linear and Non-linear Time-Domain Transient Simulation”, IEEE MTT-S International Microwave Symposium Digest, WE3D-1, Long Beach, June 2005. [Full Text PDF (244KB)]

T. J. Brazil, "Non Linear Transient Simulation of Microwave Circuits and Systems", IEEE Wireless and Microwave Technology Conference 2005, Clearwater, FL, April 2005.

I. Kallfass, C. Schick, H. Schumacher, T. J. Brazil, “A Universal Large-Signal Model for Hetero Field Effect Transistors”, Proceedings of the 12th European Gallium Arsenide and other Compound Semiconductor Applications Symposium, pp. 55-59, Amsterdam, October 2004.

M. Wren, and T. J. Brazil, “Enhanced prediction of pHEMT nonlinear distortion using a novel charge conservative model “, IEEE MTT-S International Microwave Symposium Digest, Vol. 1, pp. 31-44, Fort Worth, June 2004.

B.O’hAnnaidh, and T. J. Brazil., “A globally-continuous charge-conservative non-linear equivalent circuit model for RF MOSFETs”, Proceedings of the 11th European Gallium Arsenide and other Compound Semiconductor Applications Symposium, pp. 65-68, Munich, October 2003.

B. O’hAnnaidh, and T. J. Brazil, “Intermodulation distortion of RF MOSFETs”, IEEE High Frequency Postgraduate Student Colloquium, pp. 40-43, Belfast, Sept. 2003.

M. Wren, and T. J. Brazil, “The effect of the gate schottky diode on pHEMT power amplifier performance”, IEEE High Frequency Postgraduate Student Colloquium, pp. 52-55, Belfast, Sept. 2003.

A. Zhu, M. Wren and T. J. Brazil, “An Efficient Volterra-Based Behavioral Model for Wideband RF Power Amplifiers”, IEEE MTT-S International Microwave Symposium Digest, Vol 2, pp. 787-790, Philadelphia, June 2003. [Full Text PDF (280KB)]

C. Florian, F. Filicori, D. Mirri, T. J. Brazil, and M. Wren, “CAD identification and validation of a non-linear dynamic model for performance analysis of large-signal amplifiers”, IEEE MTT-S International Microwave Symposium Digest, Vol 3, pp. 2125-2128, Philadelphia, June 2003.

E. Condon, and T.J. Brazil, “A simplified non-linear physical model for high-frequency FETs”, Proceedings of the 32nd European Microwave Conference, Vol. I, pp. 121-123, Milan, September 2002.

I. Kallfass, H. Schumacher, M. Zeuner, U. König, T. J. Brazil, “A Model for SiGe MODFETs with Improved Large-Signal Quality and Frequency Range”, Proceedings of the 32nd European Microwave Conference, Vol. I, pp. 89-91, Milan, September 2002.

A. Zhu, and T.J. Brazil, 'An Adaptive Volterra Predistorter for the Linearization of RF High Power Amplifiers', IEEE MTT-S International Microwave Symposium Digest, Vol. I, pp. 461-464, Seattle, May 2002. [Full Text PDF (319KB)]


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