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About

Luís Pessoa is a senior researcher from the OET group at INESC TEC. He received the “Licenciatura” degree in 2006 and PhD degree in 2011, both in Electrical and Computer Engineering at the Faculty of Engineering of the University of Porto. Currently he is responsible for the conception and management of R&D projects, coordination of research students and fostering the valorization of research results through new contracts with industry. He has been involved in teaching of RF/microwave engineering and optical communications as an invited assistant professor at University of Porto. He has authored/co-authored more than 40 publications in international conferences and journals with peer-review. He has coordinated several research projects and participated in several EU research projects, being currently workpackage leader in iBROW project. His main research interests include coherent optical systems, radio-over-fibre, RF/microwave devices and antennas, underwater wireless power/communications.

Interest
Topics
Details

Details

006
Publications

2018

Evaluation of SAR induced by a planar inverted-F antenna based on a realistic human model

Authors
Vieira, VF; Pessoa, LM; Carvalho, MI;

Publication
IFMBE Proceedings

Abstract
In this paper the absorption by the human body of electromagnetic (EM) radiation generated by a Planar Inverted-F Antenna (PIFA) from a modern mobile phone is investigated through the evaluation of the Specific Absorption Rate (SAR) in head, brain and hand regions using Sim4Life (S4L) and a realistic anatomical model. Several scenarios were evaluated, by varying the distance between the antenna and the head, the feeder position and the orientation of the antenna. The effect of the presence of the hand was also studied and, finally, different communication bands were considered. The main results show that the presence of the hand is determinant to reduce SAR on head and brain, while bottom orientations of the antenna reduce the SAR on the brain, but increase the SAR in other tissues. © Springer Nature Singapore Pte Ltd. 2018.

2018

Experimental Evaluation of Resonant Tunnelling Diode Oscillators Employing Advanced Modulation Formats

Authors
Tavares, JS; Pessoa, LM; Salgado, HM;

Publication
International Conference on Transparent Optical Networks

Abstract
The performance of Resonant Tunnelling Diode (RTD) oscillators with an optical window is evaluated experimentally, in the transmission of advanced modulation formats using electrical and optical modulation, for the first time. Additionally, the impact of phase noise in the transmission performance is also assessed. © 2018 IEEE.

2017

Analysis of resonant tunnelling diode oscillators under optical modulation

Authors
Tavares, JS; Pessoa, LM; Figueiredo, JML; Salgado, HM;

Publication
International Conference on Transparent Optical Networks

Abstract
In this paper, we investigate the optical modulation characteristics of a resonant tunnelling diode (RTD) oscillator. This preliminary work on the first RTD-PD oscillators with an optical window available from the iBROW project demonstrate that this device can effectively be used to accomplish amplitude and frequency modulation with light injection. © 2017 IEEE.

2017

Nonlinear Compensation Assessment in Few-Mode Fibers via Phase-Conjugated Twin Waves

Authors
Tavares, JS; Pessoa, LM; Salgado, HM;

Publication
JOURNAL OF LIGHTWAVE TECHNOLOGY

Abstract
In this paper, we further explore the concept of phase-conjugated twin waves (PCTW) for nonlinear cancellation in space-division multiplexed (SDM) systems. Previously, we demonstrated that the PCTW technique can successfully provide nonlinear cancellation in SDM systems. In this paper, we investigate the cases where two and four spatial modes are copropagating in a multimode fiber, considering three link lengths (1000, 3200, and 8000 km). Weak-and strong-coupling regimes are also evaluated. Our numerical simulation results show an average performance improvement > 10 dB after a 1000 km transmission link.

2017

Analysis of loop antenna with ground plane for underwater communications

Authors
Aboderin, O; Pessoa, LM; Salgado, HM;

Publication
OCEANS 2017 - Aberdeen

Abstract

Supervised
thesis

2016

Comunicações óticas de alto débito para estação de acostagem submarina

Author
Diogo José Pereira Lima de Matos Lage

Institution
UP-FEUP

2016

Underwater Wireless Power Transfer

Author
Hugo Miguel Guedes Pereira dos Santos

Institution
UP-FEUP

2016

Sistema de comunicações óticas sem fios para estação de acostagem submarina

Author
José Pedro Ferreira Perdiz

Institution
UP-FEUP

2016

Projeto de antenas para comunicações RF subaquáticas

Author
Sofia Isabel Silva Inácio

Institution
UP-FEUP

2016

Software Defined Radar for Medical Imaging

Author
Wilson José dos Santos Silva

Institution
UP-FEUP