Creating and sharing knowledge for telecommunications

IT Member Profile

... Pedro Miguel da Silva Cabral

Senior Researcher

Pedro Cabral

Academic position: Assistant Professor
Joining date: 01-09-2002
Roles in IT: Senior Researcher
Thematic Line: Wireless Technologies
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

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

Scientific Achievements

  • PhD, Universidade de Aveiro, 20-12-2006
  • Licenciatura, Universidade de Aveiro, 20-07-2002
  • 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
  • Nonlinear Distortion
  • Device Modeling
  • Wireless Transmitter Architectures
  • Power Amplifier Design
  • Digital Pre-Distortion
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
26Supervision of MSc theses
As Supervisor
As Co-supervisor
1Supervision of BSc theses
As Co-supervisor
6Supervision of Research grants
As Supervisor
As Co-supervisor
39Papers in Journals
  • J. Mendes, L. C. Nunes, F. M. B. Barradas, P. M. Cabral, J. C. Pedro, The Impact of a Taper Impedance Transformation on the TRL De-Embedding Error, IEEE Journal of Microwaves, Vol. 4, No. 3, pp. 389 - 403, July, 2024,
    | Abstract     | BibTex
  • J. Mendes, L. C. Nunes, F. M. B. Barradas, T.R. Cunha, P. M. Cabral, J. C. Pedro, A Hammerstein-Like Broadband ANN-Based Transistor Behavioral Model, IEEE Transactions on Microwave Theory and Techniques, Vol. 72, No. 6, pp. 3288 - 3299, June, 2024 | BibTex
  • C. Belchior, L. C. Nunes, P. M. Cabral, J. C. Pedro, Sequential LMBA Design Technique for Improved Bandwidth Considering the Balanced Amplifiers off-State Impedance, IEEE Transactions on Microwave Theory and Techniques, Vol. 71, No. 8, pp. 3629 - 3643, August, 2023 | BibTex
  • F. M. B. Barradas, L. C. Nunes, J. Mendes, D. Barros, P. M. Cabral, J. C. Pedro, The Effect of IMD Drain Impedances in RF PA Concurrent Dual-Band Operation, IEEE Transactions on Microwave Theory and Techniques, Vol. 71, No. 7, pp. 2920 - 2933, July, 2023 | BibTex
  • C. Belchior, L. C. Nunes, P. M. Cabral, J. C. Pedro, Broadband SLMBA Design Including 90° Hybrid Frequency Response Using an Automatic Methodology, IEEE Access, Vol. 11, No. 1, pp. 69916 - 69927, July, 2023 | BibTex
  • C. Gonçalves, F. M. B. Barradas, L. C. Nunes, P. M. Cabral, J. C. Pedro, Quasi-Load Insensitive Doherty PA Using Supply Voltage and Input Excitation Adaptation, IEEE Transactions on Microwave Theory and Techniques, Vol. 70, No. 1, pp. 779 - 789, January, 2022 | BibTex
  • C. Belchior, L. C. Nunes, P. M. Cabral, J. C. Pedro, Automatic Methodology for Wideband Power Amplifier Design, IEEE Microwave and Wireless Components Letters, Vol. 31, No. 8, pp. 989 - 992, August, 2021,
    | Abstract     | Full text (PDF 1 MB) | BibTex
  • C. Gonçalves, F. M. B. Barradas, L. C. Nunes, P. M. Cabral, J. C. Pedro, A Compact Impedance Measurement Solution for Systems Operating in Load Varying Scenarios, IEEE Access, Vol. 9, No. -, pp. 38757 - 38766, March, 2021 | Full text (PDF 1 MB) | BibTex
  • J. Mendes, C. Belchior, D. Barros, F. M. B. Barradas, L. C. Nunes, P. M. Cabral, J. C. Pedro, New Transistor Behavioral Model Formulation Suitable for Doherty PA Design, IEEE Transactions on Microwave Theory and Techniques, Vol. 0, No. 0, pp. 1 - 1, February, 2021 | BibTex
  • C. Gonçalves, F. M. B. Barradas, L. C. Nunes, P. M. Cabral, J. C. Pedro, Dynamic Supply Voltage Control for PA Output Power Correction Under Variable Loading Scenarios, IEEE Transactions on Microwave Theory and Techniques, Vol. 69, No. 1, pp. 745 - 755, January, 2021 | Full text (PDF 3 MBs) | BibTex
  • 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, P. M. 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
78Papers in Conferences
  • I. C. L. Lopes, L. C. Nunes, P. M. Cabral, J. C. Pedro, Dual-Input Mixed-Mode Doherty-Outphasing Power Amplifier, International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits - INMMIC, Aveiro, Portugal, November, 2023 | BibTex
  • G. Santos, C. Gonçalves, D. Barros, F. Purroy, L. C. Nunes, F. M. B. Barradas, P. M. Cabral, An Automatic Calibration Method for Vector Receiver Load Pull Systems, International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits - INMMIC, Aveiro, Portugal, November, 2023 | BibTex
  • C. Belchior, L. C. Nunes, P. M. Cabral, J. C. Pedro, Towards the Automated RF Power Amplifier Design, IEEE International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design - SMACD, Funchal, Portugal, July, 2023,
    | Abstract     | BibTex
  • I. C. L. Lopes, L. C. Nunes, P. M. Cabral, J. C. Pedro, An Improved Extraction Method for the Trapping Time Constants in GaN HEMTs, IEEE International Microwave Symposium IMS, San Diego, United States, June, 2023 | BibTex
  • C. Belchior, L. C. Nunes, P. M. Cabral, J. C. Pedro, Output Impedance Profile Selection in Sequential LMBAs using an Automatic Method, International Workshop on Integrated Nonlinear Microwave and Millimeter-Wave Circuits - INMMIC, Cardiff, United Kingdom, April, 2022,
    | Abstract     | BibTex
  • C. Gonçalves, F. M. B. Barradas, L. C. Nunes, P. M. Cabral, J. C. Pedro, Optimal Supply Voltage for PA Output Power Correction under Load Varying Scenarios, IEEE International Microwave Symposium IMS, Los Angeles, United States, June, 2020 | BibTex
  • 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, 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, 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, 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, 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, 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, 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, June, 2017,
    | Abstract     | BibTex
  • P.F. Fonseca, P. Pedreiras, P. M. Cabral, B.C. Cunha, J. N. 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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

Currently running projects2

Acronym Name Funding Agency Start date Ending date
Gestão CTI-IT Centro de Tecnologia e Interface IT - Instituto de Telecomunicações Next generation EU - Plano de Recuperação e Resiliência (PRR) - Componente 16 “Empresas 4.0” - TD-C16-i03 “Catalisação da Transformação Digital das Empresas” 01-01-2023 31-12-2025
Joint-Lab Huawei-IT-Aveiro Joint-Lab Research Program Agreement Huawei Technologies Sweden 01-09-2020 31-08-2028

Closed Projects15

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
OMIMO Transmissor MIMO Otimizado para Sistemas 5G FCT 01-10-2018 31-12-2021
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
XiongJi Wideband Power Amplifier Design Methodologies Huawei Technologies Sweden 01-06-2019 31-08-2020
4Awards
  • C. Belchior, L. C. Nunes, P. M. Cabral, J. C. Pedro, 1st Place on the Best Student Paper Award INMMiC 2022, 1st place of the best student paper award for the paper "Output Impedance Profile Selection in Sequential LMBAs using an Automatic Method" presented at the International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits - 7-8/04/2022 - Cardiff, UK., 01-04-2022
  • 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
6Short Courses and Seminars
  • L. C. Nunes, J. C. Pedro, F. M. B. Barradas, P. M. Cabral, T.R. Cunha, RF Technology for Wireless Communications and Sensing, Portugal, Aveiro, 11-2022
  • L. C. Nunes, F. M. B. Barradas, C. Gonçalves, J. Gomes, P. M. 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, P. M. 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
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);

Activities from this researcher fall under the following United Nations Strategic Development Goals (SDGs):

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