Creating and sharing knowledge for telecommunications
... Tiago Miguel Valente Varum

Researcher

Tiago Varum

Academic position: Researcher
Joining date: 07-11-2011
Roles in IT: Researcher
Thematic Line: Wireless Technologies
Group: Radio Systems – 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



Bio

Tiago Varum was born in Estarreja, Portugal, in 1987. He got his M.Sc. degree in electronic and telecommunications engineering and Ph.D. degree in electrical engineering from the Universidade de Aveiro, Aveiro, Portugal in 2010, and 2016, respectively. Since 2017 he is Research Assistant at the Instituto de Telecomunicações, Aveiro. His main research interests include antenna design, Reconfigurable antennas, 3D-Printed antennas, non-uniform antenna arrays, beamforming and smart/adaptive antennas, for mmWave applications (Radar, 5G or SATCOM). During this time, he has participated in some projects and published several papers in this field, in conference proceedings and journals. He has also supported teaching activities in the department of electronics, telecommunications and informatics (DETI) of Universidade de Aveiro. Dr. Tiago is member of IEEE Antennas and Propagation Society.


Scientific Achievements

  • PhD, Universidade de Aveiro, 07-12-2016
  • MSc, Universidade de Aveiro, 26-07-2010
  • Instituto de Telecomunicações, 01-01-2017, Assistant Researcher (PhD)
  • IEEE - Institute of Electrical and Electronics Engineers, 01-01-2013, Member
  • IEEE Antennas and Propagation Society, 01-01-2013, Member
  • Universidade de Aveiro, 01-01-2011 - 07-12-2016, PhD Student
  • Antenna Design, Smart Antennas, Microstrip Antennas, Planar Antenna Arrays, Beamforming
  • Aplicacionais para Ciências e Engenharia, Universidade de Aveiro, Engenharia Electrónica e Telecomunicações
  • Programação em Matlab, Universidade de Aveiro, Engenharia Electrónica e Telecomunicações
  • Circuitos Eléctricos, Universidade de Aveiro, Engenharia Eletrónica e Telecomunicações
  • Análise de Circuitos, Universidade de Aveiro, Engenharia Electrónica e Telecomunicações
As Co-supervisor
  • T. Varum, J. N. Matos, P. Pinho, Detect and Pointing Algorithms Performance for a 2D Adaptive Antenna Array, Chapter in, Antenna Arrays and Beam-formation, Prof. Modar Shbat, Intech Open, Rijeka-Croatia, 2017
Early Access
  • R. Arruela, T. Varum, J. N. Matos, A Varactor-Based Balanced Biphase Variable Attenuator With a Novel Single Control Voltage Biasing Technique, IEEE Transactions on Microwave Theory and Techniques, Vol., No., pp. 1 - 15, 2025,
    | Abstract
    | BibTex
Published
  • F. A. Antunes, A. Ramos, T. Varum, J. N. Matos, Concept and Design of a Multi-Polarization Reconfigurable Microstrip Antenna with Symmetrical Biasing Control, Sensors, Vol. 24, No. 8, pp. 2408 - 2408, April, 2024,
    | Abstract
    | BibTex
  • R. Arruela, T. Varum, J. N. Matos, Design of a Compact Ka-Band Reflection-Type Vector Modulator Phase Shifter, IEEE Microwave and Wireless Technology Letters, Vol. 34, No. 1, pp. 53 - 56, January, 2024,
    | Abstract
    | BibTex
  • A. Ramos, T. Varum, J. N. Matos, A Review on Mutual Coupling Reduction Techniques in mmWaves Structures and Massive MIMO Arrays, IEEE Access, Vol. 11, No. 11, pp. 143143 - 143166, December, 2023,
    | Abstract
    | BibTex
  • R. Arruela, T. Varum, J. N. Matos, A 3.6 GHz Polar Reflection-Type Vector Modulator Phase Shifter With Amplitude Control Capability, IEEE Access, Vol. 11, No. 1, pp. 10687 - 10695, January, 2023,
    | Abstract
    | Full text (PDF 3 MBs) | BibTex
  • R. Correia, T. Varum, J. N. Matos, A. Oliveira, N.B.C. Carvalho, User Terminal Segments for Low-Earth Orbit Satellite Constellations: Commercial Systems and Innovative Research Ideas, IEEE Microwave Magazine, Vol. 23, No. 10, pp. 47 - 58, October, 2022 | BibTex
  • T. Varum, J.B.S.C. CAIADO, J. N. Matos, Compact Ultra-Wideband Series-Feed Microstrip Antenna Arrays for IoT Communications, Applied Sciences, Vol. 11, No. 14, pp. 6267 - 6267, July, 2021 | Full text (PDF 5 MBs) | BibTex
  • D. R. H. Helena, A. Ramos, T. Varum, J. N. Matos, The Use of 3D Printing Technology for Manufacturing Metal Antennas in the 5G/IoT Context, Sensors, Vol. 21, No. 10, pp. 3321 - 3321, May, 2021,
    | Abstract
    | BibTex
  • A. Navarro, P. Mostardinha, T. Varum, J. N. Matos, S. Maslovski, Double-Dielectric Microstrip Ultrahigh-Frequency Antenna for Digital Terrestrial Television, Applied Sciences, Vol. 10, No. 23, pp. 8640 - 8640, December, 2020 | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Compact N-Band Tree-Shaped Multiplexer-Based Antenna Structures for 5G/IoT Mobile Devices, Sensors, Vol. 20, No. 21, pp. 6366 - 6366, November, 2020,
    | Abstract
    | BibTex
  • R. Arruela, D. MARINHO, T. Varum, J. N. Matos, Design and Characterization of an IQ Reflection-Type Vector Modulator for Ka-Band Using PIN Diodes, IEEE Access, Vol. 8, No., pp. 212855 - 212864, November, 2020,
    | Abstract
    | Full text (PDF 2 MBs) | BibTex
  • D. MARINHO, R. Arruela, T. Varum, J. N. Matos, Software-Defined Radio Beamforming System for 5G/Radar Applications, Applied Sciences, Vol. 10, No. 20, pp. 7187 - 7187, October, 2020,
    | Abstract
    | Full text (PDF 5 MBs) | BibTex
  • B Lopes, T. Varum, J. N. Matos, Use of FrFT in an indoor scenario for chipless RFID tags ID recovery, IET Microwaves, Antennas and Propagation, Vol. 14, No. 12, pp. 1316 - 1322, September, 2020,
    | Abstract
    | BibTex
  • D. R. H. Helena, A. Ramos, T. Varum, J. N. Matos, Antenna Design Using Modern Additive Manufacturing Technology: A Review, IEEE Access, Vol. 8, No. 8, pp. 1 - 20, September, 2020,
    | Abstract
    | Full text (PDF 4 MBs) | BibTex
  • L. Rodrigues, T. Varum, J. N. Matos, Reconfigurable Diplexer-Based Filtenna for Tx/Rx Operation in Mobile Satellite Terminals, Sensors, Vol. 20, No. 8, pp. 2333 - 2333, April, 2020 | BibTex
  • L. Rodrigues, T. Varum, J. N. Matos, The Application of Reconfigurable Filtennas in Mobile Satellite Terminals, IEEE Access, Vol. 1, No. 1, pp. 1 - 1, April, 2020 | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Compact Multilayer Yagi-Uda Based Antenna for IoT/5G Sensors, Sensors, Vol. 18, No. 9, pp. 2914 - 2914, September, 2018 | BibTex
  • D. Malafaia, T. Varum, D. Matos, J. N. Matos, J. Vieira, The concept of a fully electronic beamforming antenna array for modern radar systems, Microwave and Optical Tech. Letters, Vol. 60, No. 7, pp. 1696 - 1702, May, 2018 | BibTex
  • M. DUARTE, T. Varum, J. N. Matos, P. Pinho, In-house development of 17 GHz antennas: Potentials and difficulties, URSI Radio Science Bulletin, Vol. 2018, No. 364, pp. 45 - 54, March, 2018 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Non-Uniform Microstrip Antenna Array for DSRC in Single-Lane Structures, Sensors, Vol. 16, No. 12, pp. 2101 - 2101, December, 2016 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, R. Abreu, Nonuniform Broadband Circularly Polarized Antenna Aray for Vehicular Communications, IEEE Transactions on Vehicular Technology, Vol. 65, No. 9, pp. 7219 - 7227, September, 2016,
    | Abstract
    | BibTex
  • D. Malafaia, J. Vieira, T. Varum, A. Tomé, Cognitive bio-radar: The natural evolution of bio-signals measurement, Journal of Medical Systems, Vol. 40, No. 10, pp. 1 - 2, August, 2016,
    | Abstract
    | BibTex
  • T. Varum, J. N. Matos, P. Pinho, R. Abreu, Printed nonuniform antenna array for WI-FI sectorized communications, Microwave and Optical Tech. Letters, Vol. 57, No. 9, pp. 2037 - 2041, September, 2015 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Detect and pointing algorithm's performance for a planar smart antenna array: a review, Applied Computational Electromagnetics Society Journal, Vol. 30, No. 8, pp. 824 - 837, August, 2015 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Direction of Arrival Estimaation Analysis Using a 2D Antenna Array, Procedia Technology, Vol. 17, No. 1, pp. 617 - 624, November, 2014 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, R. Abreu, A. Oliveira, J.A. Alves, Microstrip Antenna Array for Multiband Dedicated Short Range Communications, Microwave and Optical Tech. Letters, Vol. 53, No. 12, pp. 2794 - 2796, December, 2011,
    | Abstract
    | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Measurement Setup of a Ka band Switchable Circularly Polarized Phased Array Module for LEO Satellite Communications Systems, IEEE ICEAA International Conference on Electromagnetics in Advanced Applications / IEEE APWC IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications ICEAA/IEEE APWC, Lisboa, Portugal, September, 2024 | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Multilayer K-Band 4×4 Planar Array for Satellite Communications, IEEE ICEAA International Conference on Electromagnetics in Advanced Applications / IEEE APWC IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications ICEAA/IEEE APWC, Lisboa, Portugal, September, 2024 | BibTex
  • F. A. Antunes, A. Ramos, T. Varum, J. N. Matos, Phase Shifting Device with a Single Symmetric Control for Application in Reconfigurable Antennas, IEEE International Symp. on Antennas and Propagation - IEEE AP-S/USNC-URSI, Florence, Italy, July, 2024,
    | Abstract
    | BibTex
  • T. Varum, R. Correia, A. Ramos, R. Arruela, B Lopes, J. N. Matos, STRx –Transmission and Reception System with Electronical Orientation for LEO SatCom Constellations, IEEE International Symp. on Antennas and Propagation - IEEE AP-S/USNC-URSI, Florence, Italy, July, 2024 | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Mutual Coupling Reduction Techniques for mmWaves Antenna Arrays, IEEE International Symp. on Antennas and Propagation - IEEE AP-S/USNC-URSI, Florence, Italy, Vol., pp. -, July, 2024,
    | Abstract
    | BibTex
  • A. Ramos, T. Varum, J. N. Matos, A Simple Technique to Maximize Isolation in Compact mmWaves Antenna Arrays, European Conference on Antennas and Propagation - EuCap, Glasgow, United Kingdom, Vol., pp. -, March, 2024,
    | Abstract
    | BibTex
  • A. Ramos, T. Varum, R. Correia, J. N. Matos, A Multilayer Circularly Polarized Ka-Band Phased Array Module using Sequential Rotation, IEEE International Symposium on Antennas and Propagation, Denver, United States, Vol., pp. -, July, 2022,
    | Abstract
    | Full text (PDF 443 KBs) | BibTex
  • VC COELHO, T. Varum, J. N. Matos, 3D-Printed wide beamwidth lens antennas for beamforming coverage improvement, European Conference on Antennas and Propagation - EuCap, Madrid, Spain, March, 2022 | BibTex
  • A. Ramos, T. Varum, J. N. Matos, A Wideband Stripline-to-Stripline Transition for K/Ka-Bands, IEEE AP-S/URSI International Symp., Singapore, Singapore, December, 2021,
    | Abstract
    | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Compact Circularly Polarized Aperture Fed Patch Antenna for LEO Satellite Constellations, IEEE AP-S/URSI International Symp., Singapore, Singapore, December, 2021,
    | Abstract
    | BibTex
  • J. N. Matos, T. Varum, R. Correia, SDA-Software Defined Antenna, Joint EuCNC & 6G Summit, Conference online, June, 2021 | BibTex
  • A. Ramos, D. R. H. Helena, T. Varum, J. N. Matos, 3D Printed Horn Antenna for Satellite Communication Systems, 14.º Congresso do Comité Português da URSI, Conference online, December, 2020,
    | Abstract
    | BibTex
  • T. Varum, A. Ramos, J.B.S.C. CAIADO, J. N. Matos, Wideband Series-Fed Microstrip Antenna Array for 5G/IoT Systems, 12th IEEE/IET International Symposium on Communication Systems, Networks and Digital Signal Processing- CSNDSP, Porto, Portugal, July, 2020 | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Compact Dual-Band Printed Monopole for 5G/IoT, 12th IEEE/IET International Symposium on Communication Systems, Networks and Digital Signal Processing CSNDSP, Porto, Portugal, July, 2020,
    | Abstract
    | Full text (PDF 611 KBs) | BibTex
  • L. Rodrigues, T. Varum, J. N. Matos, Reconfigurable Filtenna for 5G/LEO Constellations Mobile Terminals, European Conference on Antennas and Propagation - EuCap, Copenhagen, Denmark, April, 2020 | BibTex
  • D. R. H. Helena, A. Ramos, T. Varum, J. N. Matos, Inexpensive 3D-Printed Radiating Horns for Customary Things in IoT Scenarios, European Conference on Antennas and Propagation - EuCap, Copenhagen, Denmark, April, 2020 | Full text (PDF 428 KBs) | BibTex
  • J.B.S.C. CAIADO, T. Varum, J. N. Matos, Ultra-wideband log-periodic antenna array for LEO constellations terminals, Congresso do Comité Português da URSI, Lisboa, Portugal, December, 2019 | BibTex
  • J. H. M. Martins, T. Varum, J. N. Matos, Printed Vector Modulator for 5G Communications Systems, International Microwave and Optoelectronics Conf. - IMOC, Aveiro, Portugal, November, 2019 | Full text (PDF 628 KBs) | BibTex
  • L. Rodrigues, T. Varum, J. N. Matos, Concept of a Tri-band Frequency Reconfigurable Microstrip Patch Antenna, International Microwave and Optoelectronics Conf. - IMOC, Aveiro, Portugal, November, 2019 | BibTex
  • R. Arruela, D. MARINHO, T. Varum, J. N. Matos, A Ka-band Frontend for mmWave MIMO and Beamforming Applications, International Microwave and Optoelectronics Conf. - IMOC, Aveiro, Portugal, November, 2019 | Full text (PDF 641 KBs) | BibTex
  • D. MARINHO, R. Arruela, T. Varum, J. N. Matos, Application of Digital Beamforming to Software Defined Radio 5G/Radar Systems, International Microwave and Optoelectronics Conf. - IMOC, Aveiro, Portugal, November, 2019 | Full text (PDF 1 MB) | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Design of a 28/38 GHz Compact Dual-Band Printed Monopole for 5G/IoT Sensors, Microwave and Optoelectronics Conference (IMOC) SBMO/IEEE MTT-S International IMOC, Aveiro, Portugal, November, 2019,
    | Abstract
    | BibTex
  • D. R. H. Helena, A. Ramos, T. Varum, J. N. Matos, Evaluation of Different Materials to Design 3D Printed Horn Antennas for Ku-Band, Microwave and Optoelectronics Conference (IMOC) SBMO/IEEE MTT-S International IMOC, Aveiro, Portugal, November, 2019,
    | Abstract
    | BibTex
  • T. Varum, J. N. Matos, Compact Slot Antenna Array for 5G Communications, IEEE AP-S/URSI International Symp., Atlanta, United States, July, 2019 | BibTex
  • A. Ramos, T. Varum, J. N. Matos, Integrated Multilayer Yagi Antenna for 5G, IEEE AP-S/URSI International Symp., Atlanta, United States, July, 2019 | BibTex
  • T. Varum, L. S. L. Leitão, J. N. Matos, Dual Band Printed Monopole Antenna for Wi-Fi Communications Systems, European Conference on Antennas and Propagation - EuCap, Krakow, Poland, April, 2019 | BibTex
  • T. Varum, A. Ramos, J. N. Matos, Planar Microstrip Series-fed Array for 5G Applications with Beamforming Capabilities, IEEE MTT-S International Microwave Workshop Series on 5G Hardware and System Technologies IMWS-5G, Dublin, Ireland, August, 2018 | BibTex
  • T. Varum, J. N. Matos, Substrate Integrated Waveguide Antenna Array for Modern Beamforming Radars, IEEE AP-S/URSI International Symp., Boston, United States, July, 2018 | BibTex
  • T. Varum, M. DUARTE, J. N. Matos, P. Pinho, Microstrip Antenna for IoT/WLAN Applications in Smart Homes at 17GHz, European Conference on Antennas and Propagation - EuCap, London, United Kingdom, April, 2018 | BibTex
  • M. DUARTE, T. Varum, J. N. Matos, P. Pinho, In house development of 17GHz antennas: potentialities and difficulties, Congresso do Comité Português da URSI, Lisboa, Portugal, November, 2017 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Non-uniform microstrip antenna array for tolling using a single access lane, IEEE AP-S/URSI International Symp., Fajardo, Puerto Rico, Vol. 1, pp. 1 - 2, July, 2016 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Microstrip antenna array for a new tolling approach in highways access, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. 1, pp. 1 - 4, September, 2015,
    | Abstract
    | BibTex
  • T. Varum, J. N. Matos, P. Pinho, V. C. Duarte, Circularly polarized microstrip antenna array for the Ka-band, IEEE AP-S/URSI International Symp., Vancouver, Canada, Vol. 1, pp. 1864 - 1865, July, 2015 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, R. Abreu, Non-uniform printed antenna array for wireless communications in sports arenas, European Conference on Antennas and Propagation - EuCap, Lisbon, Portugal, Vol. 1, pp. 1 - 4, April, 2015 | BibTex
  • R. F. Fernandes, J. N. Matos, P. Pinho, T. Varum, Wi-Fi intruder detection: An experimental approach, International Conf. on Emerging Security Information, Systems and Technologies - SECURWARE, Lisbon, Portugal, Vol. 1, pp. 101 - 105, November, 2014,
    | Abstract
    | BibTex
  • R. F. Fernandes, J. N. Matos, P. Pinho, T. Varum, Wi-Fi Intruder Detection, IEEE Conf. on Wireless Sensors - ICWiSe, Kuala Lumpur, Malaysia, Vol. 1, pp. 96 - 99, October, 2014 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, R. Abreu, Non-uniform microstrip antenna array for Rx DSRC communications, IEEE International Symp. on Antennas and Propagation - IEEE AP-S/USNC-URSI, Memphis, United States, Vol. 1, pp. 1071 - 1072, July, 2014 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, R. Abreu, The impact of different power dividers used in a non-uniform planar antenna array, IEEE International Symp. on Antennas and Propagation - IEEE AP-S/USNC-URSI, Memphis, United States, Vol. 1, pp. 1690 - 1691, July, 2014 | BibTex
  • T. Varum, J. N. Matos, P. Pinho, A. Oliveira, Printed Antenna for DSRC Systems with Omnidirectional Circular Polarization, IEEE Conf. on Intelligent Transportation Systems, Anchorage, United States, Vol. 1, pp. 1 - 4, September, 2012,
    | Abstract
    | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Omnidirectional Circularly Polarized Antenna for DSRC Systems, IEEE AP-S/URSI International Symp., Chicago, United States, Vol. 1, pp. 1 - 2, July, 2012,
    | Abstract
    | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Printed antenna for On-Board Unit of a DSRC System, IEEE AP-S/URSI International Symp., Spokane, United States, Vol., pp. 457 - 460, July, 2011,
    | Abstract
    | BibTex
  • T. Varum, J. N. Matos, P. Pinho, R. Abreu, Microstrip antenna for vehicular communications with improved axial ratio band, Conf. on Telecommunications - ConfTele, Lisbon, Portugal, Vol., pp. 1 - 4, April, 2011,
    | Abstract
    | BibTex
  • T. Varum, J. N. Matos, P. Pinho, Antena para comunicações DSRC, URSI Seminar of the Portuguese Committee, Lisbon, Portugal, Vol., pp. 1 - 4, September, 2010,
    | Abstract
    | BibTex

Currently running projects1

Acronym Name Funding Agency Start date Ending date
ORCIP Optical Radio Convergence Infrastructure for Communications and Power Delivering PO Centro 01-05-2017 30-04-2029

Closed Projects5

Acronym Name Funding Agency Start date Ending date
HEADWAY DSRC 5,9GHz BIT/BRISA 01-01-2011 01-12-2012
PHOAM Photonic Assisted Multibeam Phased Array Antenna ESA 01-04-2022 30-06-2024
RETIOT Utilização de Tecnologias de Reflectometría no melhoramento do futuro Internet das Coisas e Sistemas Ciber-Físicos P2020 09-01-2017 30-06-2021
RFoF DSRC Fiber Optic connection to the antenna DSRC 01-01-2014 01-12-2014
STRx SI I&DT Copromoção Nr. 033623 - STRx - Sistema de transmissão e receção de sinal de orientação eletrónica para a próxima geração de constelações de satélites P2020 01-05-2019 31-12-2022
  • A. Ramos, D. R. H. Helena, T. Varum, J. N. Matos, 3D Printed Horn Antenna for Satellite Communication Systems, Third Place Award for Best Student Paper Award from 14th Congress of the Portuguese Committee of URSI with the paper "3D Printed Horn Antenna for Satellite Communication Systems"., 01-12-2020
  • A. Ramos, T. Varum, J. N. Matos, Smart Antennas for the Future Low-Earth Orbit Satellite Constellations, Best Pitch Electrical Engineering in Research Day of University of Aveiro in June 24-26, 2020, 01-06-2020
  • J.B.S.C. CAIADO, T. Varum, J. N. Matos, Ultra-wideband Log-periodic Antenna Array for LEO Constellations Terminals, 3rd Place for Best Student Paper Award from 13th Congress of the Portuguese Committee of URSI with the paper "Ultra-wideband Log-periodic Antenna Array for LEO Constellations Terminals", 17-12-2019, 01-12-2019
  • Sensors
    2020, 2 review(s);
  • IEEE Transactions on Vehicular Technology
    2018, 1 review(s);
  • IET Microwaves, Antennas and Propagation
    2020, 1 review(s);
  • Engineering Reports
    2020, 1 review(s);
  • Electronics
    2020, 2 review(s);
  • IEEE Access
    2020, 2 review(s);
  • International Journal of Communication Systems
    2021, 1 review(s);
  • European Conference on Antennas and Propagation - EuCap
    2020, 1 review(s); 2019, 1 review(s);
  • IEEE Wireless Communications and Networking Conf. - WCNC
    2020, 1 review(s);
  • IEEE/IET International Symposium on Communication Systems, Networks and Digital Signal Processing - CSNDSP
    2020, 1 review(s);