Pedro Miguel da Silva Cabral

Pedro Cabral

Academic position:	Assistant Professor
Joining date:	01-09-2002
Roles in IT:	Researcher
Scientific Area:	Wireless Communications
Group:	Wireless Circuits – Av

Email: Send Email
Address: IT – Aveiro
Instituto de Telecomunicações
Campus Universitário de Santiago
P-3810-193 AVEIRO - PORTUGAL
Tel: +351 234 377 900
Fax: +351 234 377 901

https://www.orcid.org/0000-0003-1735-5425

Scientific Achievements

Degrees

PhD, Universidade de Aveiro, 20-12-2006
Licenciatura, Universidade de Aveiro, 20-07-2002

Expertise Topics

Nonlinear Distortion
Device Modeling
Wireless Transmitter Architectures
Power Amplifier Design
Digital Pre-Distortion

Affiliations

Instituto de Telecomunicações, 01-01-2007, Pos-Doc Researcher
Universidade de Aveiro, 01-01-2007, Auxiliar
IEEE - Institute of Electrical and Electronics Engineers, 01-01-2003, Senior Member

Academic Activities

5Lecture courses

Electrónica, Universidade de Aveiro, Lic. em Engenharia Física
Arquitectura de Computadores I, Universidade de Aveiro, MI em Engenharia Electrónica e de Telecomunicações
Arquitectura de Computadores II, Universidade de Aveiro, MI em Engenharia Electrónica e de Telecomunicações
Electrónica de Rádio Frequência, Universidade de Aveiro, MI Engenharia Electrónica e Telecomunicações
Laboratório de Electrónica, Universidade de Aveiro, MI em Engenharia Electrónica e de Telecomunicações

Supervision of theses

2PhD Student

Highly Linear and Efficient Power Amplifier for Massive MIMO Transmitters, PhD Student, Cristiano Ferreira Gonçalves, Expected conclusion 10-2020
Mecanismos de geração e controlo da distorção não-linear em amplificadores Doherty., PhD Student, Luis Nunes, Defended 12-2015

7MSc Student

Plataforma de Simulação para Sistemas 5G, MSc Student, Bruno Alexandre Amaro Santos, Concluded 12-2019
Amplificador de Potência para Sistemas 5G, MSc Student, Catarina Alexandra Xavier Belchior, Concluded 07-2019
Implementação de um Transmissor MIMO para Sistemas 5G, MSc Student, Carlos Henrique Cabral Medeiros, Concluded 12-2018
Transmissor para Sistemas 5G, MSc Student, Ruben Pereira Marques, Concluded 12-2018
Amplificador de Potência Multibanda para Comunicações Sem Fios, MSc Student, João Paulo Rocha Pinheiro, Concluded 12-2016
Frequency Characterization of Single Coil RF Relays, MSc Student, André Mariano Silva Ferreira, Concluded 07-2016
Amplificadores de Potência de Rádio Frequência Auto-Oscilantes, MSc Student, Manuel Joaquim Campos Mendes Nunes Duarte, Concluded 07-2011

4Research Grant

Arquiteturas para Sistemas 5G, Research Grant, Catarina Alexandra Xavier Belchior, Concluded 08-2017
PANORAMA, Research Grant, Sérgio Carlos da Conceição Pires, Concluded 12-2010
Bolsa de Integração na Investigação - 2, Research Grant, Filipe Miguel Esturrenho Barradas, Concluded 09-2010
Bolsa de Integração na Investigação - 1, Research Grant, Manuel Joaquim Campos Mendes Nunes Duarte, Concluded 11-2009

Co-Supervision of theses

3PhD Student

Power Amplifier Design using Artificial Intelligence, PhD Student, Catarina Alexandra Xavier Belchior, Expected conclusion 07-2023
Arquiteturas de Amplificadores de Potência RF Multi-Entrada, PhD Student, Diogo Rafael Bento Barros, Expected conclusion 06-2020
Multi-Standard Reconfigurable Wireless Transmitter Architectures, PhD Student, Sérgio Carlos da Conceição Pires, Defended 03-2014

10MSc Student

Microwave Active Load-Pull System, MSc Student, Daniel Alberto Pereira da Cunha, Expected conclusion 07-2020
Transmissor de Comunicações Outphasing e sua Linearização, MSc Student, João Paulo Louro Mendes, Concluded 07-2018
Transmissor de Comunicações Móveis Híbrido Doherty-Outphasing, MSc Student, Raul Miguel Marques Arruela, Concluded 07-2018
Design and Implementation of a low cost RF laboratoty, MSc Student, Bruno Ricardo Lito Reis, Concluded 10-2017
Bias-Point Pulsing System for RF Power Transistors’ Characterization, MSc Student, Cristiano Ferreira Gonçalves, Concluded 09-2016
Amplificador RF de Potência Outphasing-Chireix, MSc Student, João Lucas Rodrigues Silva, Concluded 09-2016
Fully-Automated Load-Pull System based on Mechanical Tuners, MSc Student, Alison Willian Pereira, Concluded 02-2016
Circuitos Electrónicos Baseados em Dispositivos Paramétricos, MSc Student, Filipe Miguel Esturrenho Barradas, Concluded 07-2012
Modulador de Amplitude para Amplificadores de Rádio Frequência, MSc Student, Filipe Alexandre da Silva Rodrigues, Concluded 03-2009
Co-location of Wireless Systems in a Mobile Infrastructure, MSc Student, Gonçalo Martins, Concluded 06-2008

Publications

29Papers in Journals

D. Barros, L. C. Nunes, P. M. Cabral, J. C. Pedro, Impact of the Input Baseband Terminations on the Efficiency of Wideband Power Amplifiers Under Concurrent Band Operation, IEEE Transactions on Microwave Theory and Techniques, Vol. 67, No. 12, pp. 5127 - 5138, December, 2019,
| Abstract | Full text (PDF 4 MBs) | BibTex
S. Teodoro, A. Silva, R. Dinis, F. M. B. Barradas, P. M. Cabral, A. Gameiro, Theoretical Analysis of Nonlinear Amplification Effects in Massive MIMO Systems, IEEE Access, Vol. 7, No. 1, pp. 172277 - 172289, November, 2019,
| Abstract | BibTex
C. Gonçalves, F. M. B. Barradas, P. M. Cabral, J. C. Pedro, Switch-Based Variable Length Stubs Network for PA Load Sensitivity Reduction, IEEE Access, Vol. 7, No. -, pp. 152576 - 152584, October, 2019,
| Abstract | Full text (PDF 1 MB) | BibTex
L. C. Nunes, D. Barros, P. M. Cabral, J. C. Pedro, Efficiency Degradation Analysis in Wideband Power Amplifiers, IEEE Transactions on Microwave Theory and Techniques, Vol. 66, No. 12, pp. 5640 - 5651, December, 2018 | BibTex
C. Gonçalves, L. C. Nunes, P. M. Cabral, J. C. Pedro, Pulsed I/V and S-parameters measurement system for isodynamic characterization of power GaN HEMT transistors, Intrnl. Journal of RF and Microwave Computer-Aided Engineering, Vol. 28, No. 8, pp. e21515 - e21515, August, 2018 | BibTex
F. M. B. Barradas, PMT Tomé, José M. Gomes Gomes, T.R. Cunha, P. M. Cabral, J. C. Pedro, Power, Linearity, and Efficiency Prediction for MIMO Arrays With Antenna Coupling, IEEE Transactions on Microwave Theory and Techniques, Vol. 65, No. 12, pp. 5284 - 5297, December, 2017 | BibTex
F. M. B. Barradas, L. C. Nunes, T.R. Cunha, P.M.L. Lavrador, P. M. Cabral, J. C. Pedro, Compensation of Long-Term Memory Effects on GaN HEMT-Based Power Amplifiers, IEEE Transactions on Microwave Theory and Techniques, Vol. 65, No. 9, pp. 3379 - 3388, March, 2017,
| Abstract | BibTex
P. M. Cabral, L. C. Nunes, T. R. Ressurreição, J. C. Pedro, Trapping behavior of GaN HEMTs and its implications on class B PA bias point selection, International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Vol. 30, No. 1, pp. 1 - 11, January, 2017 | BibTex
J. C. Pedro, L. C. Nunes, P. M. Cabral, A Simple Method to Estimate the Output Power and Efficiency Load-Pull Contours of Class B Power Amplifiers, IEEE Transactions on Microwave Theory and Techniques, Vol. 63, No. 4, pp. 1239 - 1249, April, 2015 | BibTex
F. M. B. Barradas, L. C. Nunes, J. C. Pedro, T.R. Cunha, P.M.L. Lavrador, P. M. Cabral, Accurate Linearization with Low-Complexity Models Using Cascaded Digital Predistortion Systems, IEEE Microwave Magazine, Vol. 16, No. 1, pp. 94 - 103, February, 2015 | BibTex
S. Pires, P. M. Cabral, J. C. Pedro, Radio frequency carrier amplitude-burst transmitters – from architecture to circuit, IET Microwaves, Antennas and Propagation, Vol. 9, No. 3, pp. 271 - 280, February, 2015 | BibTex
S. Pires, P. M. Cabral, J. C. Pedro, Envelope Modulator Selection for RF Carrier Phase-Burst Transmitters, IEEE Microwave and Wireless Components Letters, Vol. 24, No. 9, pp. 643 - 645, September, 2014 | BibTex
M. D. Duarte, P. M. Cabral, J. C. Pedro, Switching Noise Improvement of a Limit-Cycle Amplifier Using a Negative Hysteresis Relay, IEEE Transactions on Power Electronics, Vol. 29, No. 6, pp. 3223 - 3231, June, 2014 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, AM/AM and AM/PM Distortion Generation Mechanisms in Si LDMOS and GaN HEMT Based RF Power Amplifiers, IEEE Transactions on Microwave Theory and Techniques, Vol. 62, No. 4, pp. 799 - 809, April, 2014 | BibTex
J. C. Pedro, P. M. Cabral, T.R. Cunha, P.M.L. Lavrador, A Multiple Time-Scale Power Amplifier Behavioral Model for Linearity and Efficiency Calculations, IEEE Transactions on Microwave Theory and Techniques, Vol. 61, No. 1, pp. 606 - 615, January, 2013,
| Abstract | Full text (PDF 2 MBs) | BibTex
P.M.L. Lavrador, T.R. Cunha, P. M. Cabral, J. C. Pedro, RF Power Amplification: Current Trends on the Linearity-Efficiency Compromise, IEEE Microwave Magazine, Vol. 11, No. 5, pp. 44 - 58, August, 2010 | BibTex
T.R. Cunha, E. Gonçalves Lima, H. Teixeira, P. M. Cabral, J. C. Pedro, Deriving a Power Amplifier Linearizer from a Physics-based System-level Model, Intrnl. Journal of RF and Microwave Computer-Aided Engineering, Vol. 20, No. 3, pp. 321 - 332, May, 2010 | BibTex
P. M. Cabral, L. C. Cabria, F. Rodrigues, J. A. Garcia, J. C. Pedro, Wireless Transmitter Capabilities through Supply Modulation, Intrnl. Journal of RF and Microwave Computer-Aided Engineering, Vol. 20, No. 2, pp. 241 - 251, March, 2010 | BibTex
J. A. Garcia, J. C. Pedro, P. M. Cabral, C. Fager, A. Zhu, P. Colantonio, Nonideality Sources and Implementation Considerations in Polar Transmitters, International Journal of Microwave and Wireless Technologies, Vol. 1, No. .., pp. 109 - 116, April, 2009 | BibTex
N. A. Amar, J. A. Garcia, P. M. Cabral, J. C. Pedro, Accurately Characterizing the Vdd-to-AM and Vdd-to-PM Nonlinearities in a GaN HEMT Class E Power Amplifier, International Journal of Microwave and Wireless Technologies, Vol. 3, No. 3, pp. 202 - 207, July, 2008 | BibTex
P. M. Cabral, J. C. Pedro, J. A. Garcia, Nonlinear Distortion Generation Mechanisms in Wireless Polar Transmitters, International Journal of Microwave and Wireless Technologies, Vol. 3, No. 3, pp. 196 - 201, July, 2008 | BibTex
T.R. Cunha, J. C. Pedro, P. M. Cabral, Design of a power amplifier feed-forward RF model with physical knowledge considerations, IEEE Transactions on Microwave Theory and Techniques, Vol. 55, No. 12, pp. 2747 - 2756, December, 2007 | BibTex
J. C. Pedro, J. A. Garcia, P. M. Cabral, Nonlinear Distortion Analysis of Polar Transmitters, IEEE Transactions on Microwave Theory and Techniques, Vol. 55, No. 12, pp. 2757 - 2765, December, 2007,
| Abstract | BibTex
J. Martins, P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, A Metric for the Quantification of Memory Effects in Wireless Power Amplifiers, IEEE Transactions on Microwave Theory and Techniques, Vol. 54, No. 12, pp. 4432 - 4439, December, 2006 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Modeling Nonlinear Memory Effects on the AM/AM, AM/PM and Two-Tone IMD in Microwave PA Circuits, Intrnl. Journal of RF and Microwave Computer-Aided Engineering, Vol. -, No. -, pp. - - -, January, 2006 | BibTex
G. Vendelin, J. C. Pedro, P. M. Cabral, Amplifier and Transistor Gains Revisited: GP, Av, Ai, Gm and Zm, Microwave Journal, Vol. .., No. .., pp. 80 - 92, April, 2005 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, A unified theory for nonlinear distortion characteristics in different amplifier technologies, Microwave Journal, Vol., No., pp. -, December, 2004 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Nonlinear device model of microwave power GaN HEMTs for high-power amplifier design, IEEE Transactions on Microwave Theory and Techniques, Vol. 52, No. 11, pp. 2585 - 2592, November, 2004 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Repetidor para o Sub-Sistema Rádio da Rede UMTS, Electrónica e Telecomunicações, Vol. 3, No. 8, pp. 785 - 789, January, 2003 | BibTex

72Papers in Conferences

L. C. Nunes, F. M. B. Barradas, D. Barros, P. M. Cabral, J. C. Pedro, Current Mode Outphasing Power Amplifier, IEEE International Microwave Symposium IMS, Boston, United States, Vol., pp. -, June, 2019 | BibTex
D. Barros, L. C. Nunes, P. M. Cabral, J. C. Pedro, Impact of the Input Baseband Impedance on the Instantaneous Bandwidth of Wideband Power Amplifiers, IEEE International Microwave Symposium IMS, Boston, United States, Vol., pp. -, June, 2019 | BibTex
L. C. Nunes, D. Barros, P. M. Cabral, J. C. Pedro, Efficiency Degradation in Wideband Power Amplifiers, IEEE International Microwave Symposium IMS, Philadelphia, United States, Vol., pp. -, June, 2018 | BibTex
L. C. Nunes, J. Gomes, P. M. Cabral, J. C. Pedro, A Simple Method to Extract Trapping Time Constants of GaN HEMTs, IEEE International Microwave Symposium IMS, Philadelphia, United States, Vol., pp. -, June, 2018 | BibTex
F. M. B. Barradas, T.R. Cunha, P. M. Cabral, J. C. Pedro, Magnetless RF Isolator Design Using Grounded Transistors, IEEE International Microwave Symposium IMS, Philadelphia, United States, Vol., pp. -, June, 2018 | BibTex
C. Gonçalves, P. M. Cabral, L. C. Nunes, J. C. Pedro, Conservative Current and Charge Data Extracted from Pulsed S-Parameter Measurements for GaN HEMT PA Design, IEEE International Symp. on Microwave Theory and Tech., Hawaii, United States, Vol., pp. -, June, 2017 | BibTex
F. M. B. Barradas, T.R. Cunha, P. M. Cabral, J. C. Pedro, Modeling PA linearity and efficiency in MIMO transmitters, IEEE International Microwave Symposium IMS, Honolulu, United States, Vol., pp. -, June, 2017,
| Abstract | BibTex
P.F. Fonseca, P. Pedreiras, P. M. Cabral, B.C. Cunha, J. M. Matos, FS Silva, Motivating First Year Students for an Engineering Degree, CISPEE - International Conference of the Portuguese Society for Education in Engineering CISPEE, Bragança, Portugal, Vol., pp. -, October, 2016 | BibTex
P. M. Cabral, L. C. Nunes, J. C. Pedro, High Power Wireless Applications of Si and GaN Devices, Workshop on Compound Semiconductor Devices and Integrated Circuits held in Europe WOCSDICE, Aveiro, Portugal, Vol. .., pp. .. - .., June, 2016 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, AM/PM distortion physical origins in Si LDMOS Doherty power amplifiers, IEEE International Microwave Theory and Tech. Symp., San Francisco, United States, Vol., pp. -, May, 2016 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, Impact of Trapping Effects on GaN HEMT Based Doherty PA Load-Pull Ratios, International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits - INMMIC, Taormina, Italy, Vol., pp. -, October, 2015 | BibTex
L. N. Nunes, P. M. Cabral, J. C. Pedro, LUT Based Behavioral Model for Doherty Power Amplifier Design, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. .., pp. .. - .., September, 2015 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, LUT Based Behavioral Model for Doherty Power Amplifier Design, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol., pp. -, September, 2015 | BibTex
L. N. Nunes, P. M. Cabral, J. C. Pedro, A New Nonlinear Model Extraction Methodology for GaN HEMTs Subject to Trapping Effects, IEEE International Microwave Theory and Tech. Symp., Phoenix, United States, Vol. .., pp. .. - .., June, 2015 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, A New Nonlinear Model Extraction Methodology for GaN HEMTs Subject to Trapping Effects, IEEE International Microwave Theory and Tech. Symp., Phoenix, United States, Vol., pp. -, May, 2015 | BibTex
J. C. Pedro, L. C. Nunes, P. M. Cabral, Soft compression and the origins of nonlinear behavior of GaN HEMTs, European Microwave Conf. - EMC, Roma, Italy, Vol. 1, pp. 1297 - 1300, October, 2014,
| Abstract | BibTex
L. N. Nunes, P. M. Cabral, J. C. Pedro, AM/PM Distortion in GaN HEMT Doherty Power Amplifiers, IEEE International Microwave Theory and Tech. Symp., Tampa Bay, United States, Vol. .., pp. .. - .., June, 2014 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, AM/PM Distortion in GaN Doherty Power Amplifiers, IEEE International Microwave Theory and Tech. Symp., Tampa, United States, Vol., pp. -, June, 2014 | BibTex
L. N. Nunes, P. M. Cabral, J. C. Pedro, Study of the GaN HEMT Doherty Power Amplifier Distortion, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, leuven, Belgium, Vol. .., pp. .. - .., April, 2014 | BibTex
M. D. Duarte, P. M. Cabral, J. C. Pedro, Modeling Efficiency of Carrier Amplitude Burst Wireless Transmitter Systems, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Leuven, Belgium, Vol. .., pp. .. - .., April, 2014 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, Study of the GaN HEMT Doherty Power Amplifier Distortion, International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits - INMMIC, Leuven, Belgium, Vol., pp. -, April, 2014 | BibTex
T.R. Cunha, P. M. Cabral, L. C. Nunes, Characterizing power amplifier static AM/PM with spectrum analyzer measurements, IEEE International Conf. on Signals, Systems, Devices - SSD, Barcelona, Spain, Vol. 1, pp. 1 - 4, February, 2014 | BibTex
, P. M. Cabral, J. C. Pedro, A Physical Model of Power Amplifiers’ AM/AM and AM/PM Distortions and Their Internal Relationship, IEEE International Microwave Theory and Tech. Symp., Seattle, United States, Vol. 1, pp. 1 - 1, June, 2013 | BibTex
S.P. Pires, P. M. Cabral, J. C. Pedro, RF Carrier Phase-Burst Transmitter, IEEE International Microwave Theory and Tech. Symp., Seattle, United States, Vol. 0, pp. 1 - 4, June, 2013 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, A Physical Model of Power Amplifiers’ AM/AM and AM/PM Distortions and Their Internal Relationship, IEEE International Microwave Theory and Tech. Symp., Seatle, United States, Vol., pp. -, June, 2013 | BibTex
M. J. D. Duarte, P. M. Cabral, J. C. Pedro, Analysis and design of a limit-cycle amplifier taking into account the propagation delay of the relay, Conf. on Telecommunications - ConfTele, Castelo Branco, Portugal, Vol. 1, pp. 85 - 88, May, 2013,
| Abstract | BibTex
F. M. B. Barradas, P. M. Cabral, J. C. Pedro, A new model for the description of small- and large-signal behaviour of parametric amplifiers, Conf. on Telecommunications - ConfTele, Castelo Bramco, Portugal, Vol. .., pp. .. - .., May, 2013 | BibTex
L. N. Nunes, P. M. Cabral, J. C. Pedro, A large-signal physical model of the AM/PM characteristic of a RF power amplifier, Conf. on Telecommunications - ConfTele, Castelo Bramco, Portugal, Vol. .., pp. .. - .., May, 2013 | BibTex
S.P. Pires, P. M. Cabral, J. C. Pedro, High-Efficiency RF Transmitters: RF Carrier Amplitude-Burst, Conf. on Telecommunications - ConfTele, Castelo Branco, Portugal, Vol. 0, pp. 1 - 4, May, 2013 | BibTex
L. C. Nunes, P. M. Cabral, J. C. Pedro, A large-signal physical model of the AM/PM characteristic of a RF power amplifier, Conf. on Telecommunications - ConfTele, Castelo Branco, Portugal, Vol., pp. -, May, 2013 | BibTex
S.P. Pires, P. M. Cabral, J. C. Pedro, Impact of the Amplifier-BandPass Reconstruction Filter Interaction on the Linearity of Carrier Amplitude-Burst Transmitters, IEEE Wireless and Microwave Technology Conf. - WAMICON, Florida, United States, Vol. 0, pp. 1 - 4, April, 2013 | BibTex
M. J. D. Duarte, P. M. Cabral, J. C. Pedro, Bandwidth Improvement of a Limit-Cycle Amplifier Using a Novel Hysteretic Relay, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Dublin, Ireland, Vol. .., pp. .. - .., September, 2012 | BibTex
S.P. Pires, P. M. Cabral, J. C. Pedro, A carrier-burst transmitter implementation: Design of bandpass filter and amplifier-BPF connection, International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits - INMMIC, Dublin, Ireland, Vol. 0, pp. 1 - 3, September, 2012,
| Abstract | BibTex
J. C. Pedro, P. M. Cabral, T.R. Cunha, P.M.L. Lavrador, A New Power Amplifier Behavioral Model for Simultaneous Linearity and Efficiency Calculations, IEEE International Microwave Theory and Tech. Symp., Quebec, Canada, Vol. 1, pp. 00 - 00, June, 2012,
| Abstract | Full text (PDF 793 KBs) | BibTex
R. Marante, J. A. Garcia, L. C. Cabria, P. M. Cabral, J. C. Pedro, Nonlinear Characterization Techniques for Improving Accuracy of GaN HEMT Model Predictions in RF Power Amplifiers, IEEE International Symp. on Microwave Theory and Tech., Anaheim, United States, Vol. .., pp. 1680 - 1683, June, 2010 | BibTex
HM Mostardinha, P. M. Cabral, N.B.C. Carvalho, GaN RF Testbed for Space Applications, ESA Microwave Technology and Techniques Workshop: Enabling Future Space Systems, Noordwijk, Netherlands, Vol. .., pp. .. - .., May, 2010 | BibTex
T.R. Cunha, E. Gonçalves Lima, H. Teixeira, P. M. Cabral, J. C. Pedro, A new predistorter model based on power amplifier physical knowledge, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Gothenburg, Sweden, Vol. 1, pp. 140 - 143, April, 2010 | BibTex
HM Mostardinha, P. M. Cabral, N.B.C. Carvalho, GaN RF Oscillator used in Space Applications, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Goteborg, Sweden, Vol. .., pp. 50 - 53, April, 2010 | BibTex
P. M. Cabral, F. Rodrigues, L. C. Cabria, J. A. Garcia, J. C. Pedro, Speed Requirements of Supply Modulators used in Polar Architectures, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Goteborg, Sweden, Vol. .., pp. 71 - 74, April, 2010 | BibTex
R. Marante, L. C. Cabria, P. M. Cabral, J. C. Pedro, J. A. Garcia, Temperature Dependent Memory Effects on a Drain Modulated GaN HEMT Power Amplifier, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Goteborg, Sweden, Vol. .., pp. 75 - 78, April, 2010 | BibTex
P. M. Cabral, L. C. Cabria, J. A. Garcia, J. C. Pedro, Polar Transmitter Architecture Used in a Software Defined Radio Context, IEEE International Microwave Workshop Series on ''RF Front-ends for Software Defined and Cognitive Radio Solutions'' - IMWS, Aveiro, Portugal, Vol. .., pp. .. - .., February, 2010 | BibTex
L. C. Cabria, P. M. Cabral, J. C. Pedro, J. A. Garcia, A Class E Power Amplifier Design for Drain Modulation under a High PAPR WiMAX Signal, IEEE International Microwave Workshop Series on ''RF Front-ends for Software Defined and Cognitive Radio Solutions'' - IMWS, Aveiro, Portugal, Vol. .., pp. .. - .., February, 2010 | BibTex
L. C. Cabria, P. M. Cabral, J. A. Garcia, J. C. Pedro, Predistorsión Digital Selectiva en Transmisores Polares, Simposium Nacional de la URSI, Santander, Spain, Vol. CDROM, pp. .. - .., September, 2009 | BibTex
R. Marante, J. A. Garcia, P. M. Cabral, J. C. Pedro, Distorsión No lineal en un Transmisor Polar debida a la Característica Ron(VDD) del Dispositivo GaN HEMT, Simposium Nacional de la URSI, Santander, Spain, Vol. CDROM, pp. .. - .., September, 2009 | BibTex
L. C. Cabria, J. A. Garcia, P. M. Cabral, J. C. Pedro, Taking Advantage of the Envelope Statistics on a Polar Transmitter Design, IST Mobile and Wireless Communications Summit, Santander, Spain, Vol. CDROM, pp. .. - .., June, 2009 | BibTex
P. M. Cabral, L. C. Cabria, J. A. Garcia, J. C. Pedro, Polar Transmitter Pre-Distortion Technique Validated with 2.5G Mobile Communication Signals, Conf. on Telecommunications - ConfTele, Santa Maria da Feira, Portugal, Vol. .., pp. 85 - 88, May, 2009 | BibTex
P. M. Cabral, J. C. Pedro, Bandwidth Requirements of Envelope Amplifiers for Polar Transmitters, Conf. on Telecommunications - ConfTele, Santa Maria da Feira, Portugal, Vol. .., pp. 97 - 100, May, 2009 | BibTex
L. C. Cabria, P. M. Cabral, J. A. Garcia, J. C. Pedro, Linearization of a Polar Transmitter for EDGE applications, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Malaga, Spain, Vol. .., pp. 115 - 118, November, 2008 | BibTex
P. M. Cabral, R. Marante, J. A. Garcia, J. C. Pedro, Impact of the ON Resistance Dependence with VDD on Polar Transmitter Residual Distortion, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Malaga, Spain, Vol. .., pp. 123 - 126, November, 2008 | BibTex
G. Martins, N.B.C. Carvalho, P. M. Cabral, Co-location of different technologies in the same site, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Malaga, Spain, Vol. .., pp. 177 - 180, November, 2008 | BibTex
P. M. Cabral, J. C. Pedro, J. A. Garcia, L. C. Cabria, A Linearized Polar Transmitter for Wireless Applications, IEEE International Microwave Theory and Tech. Symp., Atlanta, United States, Vol. .., pp. 935 - 938, June, 2008 | BibTex
P. M. Cabral, J. C. Pedro, J. A. Garcia, Intermodulation Distortion in Polar Transmitters, International Symp. on Microwave and Optical Technology - ISMOT, Rome, Italy, Vol. .., pp. 299 - 302, December, 2007 | BibTex
J. A. Garcia, P. M. Cabral, J. C. Pedro, Characterizing the Vdd-to-AM and Vdd-to-PM Nonlinearities in a GaN HEMT Class E Power Amplifier, International Symp. on Microwave and Optical Technology - ISMOT, Rome, Italy, Vol. .., pp. 375 - 378, December, 2007 | BibTex
J. A. Garcia, J. C. Pedro, P. M. Cabral, C. Fager, A. Zhu, Nonideality Sources and Implementation Considerations in Polar Transmitters, Target Days, Rome, Italy, Vol. .., pp. 47 - 51, December, 2007 | BibTex
T.R. Cunha, J. C. Pedro, P. M. Cabral, A. Zhu, General nonlinear feed-forward RF model for power amplifiers, IEEE International Microwave Theory and Tech. Symp., Honolulu, United States, Vol., pp. 2027 - 2030, June, 2007 | BibTex
T.R. Cunha, P. M. Cabral, J. C. Pedro, Power amplifier feed-forward model derived from physical behavior, Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol., pp. -, May, 2007 | BibTex
J. C. Pedro, P. M. Cabral, J. A. Garcia, Nonlinear Distortion Analysis of Polar Transmitters, IEEE International Microwave Theory and Tech. Symp., Honolulu, United States, Vol. 1, pp. 957 - 960, May, 2007 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, GaN Model Robustness from an IMD point of view, Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. .., pp. 177 - 180, May, 2007 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Envelope Time Domain Characterization of Microwave Power Amplifiers, Mediterranean Microwave Symp. - MMS, Genova, Italy, Vol. .., pp. 383 - 386, September, 2006 | BibTex
N.B.C. Carvalho, P. M. Cabral, J. C. Pedro, Modeling Strategies and Characterization Techniques for Microwave GaN Power Amplifiers, ESA Microwave Technology and Techniques Workshop: Enabling Future Space Systems, Noordwijk, Netherlands, Vol. 0, pp. 0 - 0, May, 2006 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Bias Networks Impact on the Dynamic AM/AM Contours in Microwave Power Amplifiers, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Aveiro, Portugal, Vol. .., pp. .. - .., January, 2006 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Dynamic AM-AM and AM-PM Behavior in Microwave PA Circuits, Asia Pacific Microwave Conf. - APMC, Suzhou, China, Vol. 4, pp. 2386 - 2389, December, 2005 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Extraction Procedure and Validation of a Large-Signal Model for GaN HEMTs, Conf. on Design of Circuits and Integrated Systems, Lisboa, Portugal, Vol. -, pp. - - -, November, 2005 | BibTex
J. C. Pedro, J. P. M. Martins, P. M. Cabral, New Method for Phase Characterization of Nonlinear Distortion Products, IEEE International Microwave Theory and Tech. Symp., Long Beach, United States, Vol. CDROM, pp. 971 - 974, June, 2005 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Novel Explanation for Low Frequency High Linearity Characteristics on BJTs, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. -, pp. - - -, April, 2005 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Higly Linear GaN class AB power amplifier design, Asia Pacific Microwave Conf. - APMC, New Delhi, India, Vol., pp. -, December, 2004 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Modeling AM/AM and AM/PM conversions in microwave power amplifier circuits, Integrated Non-linear Microwave and Millimetre-wave Circuits Conf. - INMMIC, Rome, Italy, Vol., pp. 139 - 142, November, 2004 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, Nonlinear model with AM/AM, AM/PM and IMD prediction capabilities for GaN HEMTs, International Workshop on Electronics and System Analysis - IWESA, Bilbao, Spain, Vol., pp. -, October, 2004 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, New Nonlinear Device Model for Microwave Power GaN HEMTs, IEEE International Symp. on Microwave Theory and Tech., Fort Worth, United States, Vol. 1, pp. 51 - 54, June, 2004 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, An Integrated View of Nonlinear Distortion Phenomena in Various Power Amplifier Technologies, European Microwave Conf. - EMC, Munique, Germany, Vol. -, pp. 69 - 73, October, 2003 | BibTex
P. M. Cabral, J. C. Pedro, N.B.C. Carvalho, A Repeater Prototype for the UMTS Network Radio Sub-System, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. -, pp. 277 - 280, June, 2003 | BibTex
P. Monteiro, P. M. Cabral, M. J. N. Lima, R. F. Rocha, Adjustable Pulse Shaping Filter with Active Impedance Matching for Optical Soliton Communication Systems, Gallium Arsenide Applications Symp. - GAAS, Amsterdan, Netherlands, Vol. -, pp. 512 - 520, September, 1998 | BibTex

Projects

Currently running projects2

Acronym	Name	Funding Agency	Start date	Ending date
OMIMO	Transmissor MIMO Otimizado para Sistemas 5G	FCT	01-10-2018	30-09-2021
XiongJi	Wideband Power Amplifier Design Methodologies	Huawei Technologies Sweden	01-06-2019	30-06-2023

Closed Projects13

Acronym	Name	Funding Agency	Start date	Ending date
APIC	Analog Predistorter in Integrated Circuit	IT	01-07-2016	01-06-2018
CRRF	CARACTERIZAÇÃO DE RELÉS DE RÁDIO FREQUÊNCIA	Tyco Electronics	01-05-2015	01-04-2017
Digital_PAs	Digital_PAs - Digital RF Power Amplifiers for Wireless Applications	FCT/PTDC	01-01-2009	01-06-2012
GaNSpace	GaNSpace	EFACEC	01-07-2008	01-05-2010
HLPA2MIMO	Highly Linear Power Amplifier for Massive MIMO	Ampleon	01-07-2016	01-06-2020
Lin5GPA	Power Amplifier Linearization for 5G	FCT/PTDC	01-05-2016	01-04-2018
MEGaN	Model Extraction of GaN Transistors	FCT/POCTI	01-01-2004	31-12-2005
NGTVD	NGTvD - Next generation Digital Tv over Fiber	QREN, Televés	01-03-2010	01-12-2011
PANORAMA	PANORAMA - Plataforma Rádio	PT Inovação	01-01-2009	01-06-2011
ROOSTER	Rooster - Solutions to Optimize Efficiency-Linearity in High Power Multi-Band MISO Power Amplifiers	Huawei Technologies Sweden	01-07-2016	01-06-2018
SOPAS	Self-Oscillating Radio Frequency Power Amplifiers	FCT/PTDC	01-02-2011	01-05-2013
SWIPA	Switching Mode Power Amplifiers for Wireless Communications	IT/LA	01-11-2008	01-11-2010
TARGET	Top Amplifier Research Group in an European Team	EU	01-01-2004	31-12-2006

Other Scientific Achievements

3Awards

J. C. Pedro, T.R. Cunha, P. M. Cabral, P.M.L. Lavrador, Annual Collaboration Team Award, O Projecto de Investigação com a empresa Huawei Technologies Sweden, AB., foi agraciado com o Prémio “Annual Collaboration Team Award” atribuído pela multinacional chinesa Huawei Technologies, Co. Ltd., 01-12-2015
T.R. Cunha, P. M. Cabral, L. N. Nunes, Best Paper Award - CCSP-SSD'14, Best paper award for the paper ''Characterizing power amplifier static AM/PM with spectrum analyzer measurements'' presented at the IEEE 11th International Multi-Conference on Systems, Signals and Devices - Conference on Communication & Signal Processing, CCSP-SSD’14, Castelldefels-Barcelona, Spain, February 11-14, 2014., 01-02-2014
T.R. Cunha, P. M. Cabral, L. C. Nunes, Characterizing power amplifier static AM/PM with spectrum analyzer measurements, Best Paper Award - CCSP-SSD'14, Best paper award for the paper ''Characterizing power amplifier static AM/PM with spectrum analyzer measurements'' presented at the IEEE 11th International Multi-Conference on Systems, Signals and Devices - Conference on Communication & Signal Processing, CCSP-SSD’14, Castelldefels-Barcelona, Spain, February 11-14, 2014., 01-02-2014, 01-02-2014

5Short Courses and Seminars

L. C. Nunes, F. M. B. Barradas, C. Gonçalves, J. Gomes, PMT Tomé, T.R. Cunha, P. M. Cabral, J. C. Pedro, Long-Term Memory Effects in GaN Devices: From Modeling to Compensation, Spain, 09-2018
F. M. B. Barradas, T.R. Cunha, PMT Tomé, P.M.L. Lavrador, P. M. Cabral, L. C. Nunes, J. C. Pedro, Prediction and Compensation of PA Linearity and Efficiency in MIMO scenarios, Spain, Madrid, 09-2018
F. M. B. Barradas, P. M. Cabral, T.R. Cunha, J. C. Pedro, MIMO Transmitter Modeling for Simultaneous Linearity and Efficiency Optimization, United States, 06-2017
T.R. Cunha, P. M. Cabral, L. C. Nunes, F. M. B. Barradas, J. C. Pedro, Wideband power amplifier linearization: from active device distortion to DPD compensation, United States, Austin, TX, 01-2016
J. C. Pedro, P. M. Cabral, T.R. Cunha, RF Power Amplifier and Wireless Transmitter Linearity: a Device and System Level Issue, United Kingdom, Manchester, 10-2011

Other Contributions

3Conference Committees

Asia Pacific Microwave Conf. - APMC, Technical Programme Committee, 2012
IEEE International Conf. on RFID-Technology and Applications, Technical Programme Committee, 2011
IEEE International Microwave Workshop Series on ''RF Front-ends for Software Defined and Cognitive Radio Solutions'' - IMWS, Organizing Committee, 2010

8Refereeing Journals

IEEE Transactions on Microwave Theory and Techniques
2006, 1 review(s);
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
2009, 1 review(s);
IEEE Transactions on Instrumentation and Measurement
2009, 1 review(s);
IEEE Transactions on Circuits and Systems I: Regular Papers
2009, 1 review(s);
IEEE Microwave and Wireless Components Letters
2010, 1 review(s);
IEEE Microwave Magazine
2010, 1 review(s);
IET Microwaves, Antennas and Propagation
2010, 1 review(s);
Journal of Electromagnetic Waves and Applications
2011, 1 review(s);

3Refereeing Conferences

IEEE International Microwave Workshop Series on ''RF Front-ends for Software Defined and Cognitive Radio Solutions'' - IMWS
2009, 1 review(s);
Conf. on Telecommunications - ConfTele
2011, 1 review(s);
European Signal Processing Conference EUSIPCO
2011, 1 review(s);

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