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Sobre

Sobre

Sou investigador sénior no Centro de Telecomunicações e Multimédia do INESC TEC, e coordenador da área de tecnologia ótica e eletrónica. Concluí a licenciatura em 2006 e o doutoramento em 2011, ambos em Engenharia Electrotécnica e de Computadores, pela Faculdade de Engenharia da Universidade do Porto. Atualmente sou responsável pela conceção e gestão de projetos de I&D, orientação de alunos de mestrado/doutoramento e bolseiros de investigação, e por promover a valorização de resultados de investigação através de novos contratos com a indústria. Estive envolvido como professor assistente convidado da Universidade do Porto nas disciplinas de engenharia de rádio e microondas e comunicações óticas. Sou autor/co-autor de mais de 50 publicações em conferências e revistas internacionais com revisão por pares, e de uma patente europeia. Já coordenei vários projetos de investigação e participei em vários projetos europeus. Os meus principais interesses de investigação incluem sistemas óticos coerentes, rádio-sobre-fibra, dispositivos rádio/microondas e antennas, transferência de energia sem fios e comunicações subaquáticas.

Tópicos
de interesse
Detalhes

Detalhes

016
Publicações

2019

Resonant tunneling diode photodetectors for optical communications

Autores
Watson, S; Zhang, WK; Tavares, J; Figueiredo, J; Cantu, H; Wang, J; Wasige, E; Salgado, H; Pessoa, L; Kelly, A;

Publicação
Microwave and Optical Technology Letters

Abstract
Optical modulation characteristics of resonant tunneling diode photodetectors (RTD-PD) are investigated. Intensity modulated light excites the RTD-PDs to conduct data experiments. Simple and complex data patterns are used with results showing data rates up to 80 and 200 Mbit/s, respectively. This is the first demonstration of complex modulation using resonant tunneling diodes. © 2019 The Authors. Microwave and Optical Technology Letters published by Wiley Periodicals, Inc.

2019

Optical direct intensity modulation of a 79GHz resonant tunneling diode-photodetector oscillator

Autores
Zhang, WK; Watson, S; Figueiredo, J; Wang, J; Cantu, HI; Tavares, J; Pessoa, L; Al Khalidi, A; Salgado, H; Wasige, E; Kelly, AE;

Publicação
Optics Express

Abstract

2018

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

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

Publicação
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

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

Publicação
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.

2018

Elliptical Monopole Antenna on InP Substrate for Sub-THz RTD-based Oscillators

Autores
Santos, HM; Pessoa, LM; Salgado, HM; Pinho, P;

Publicação
2018 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING

Abstract
The high permittivity of InP substrates has been a limiting factor for the bandwidth and efficiency of antennas fabricated in this material. In this manuscript we propose an elliptical monopole, monolithically fabricated in InP, fed by a CPW line. The suggested topology was simulated using HFSS finite element method. Input reflection coefficient measurements were performed on the monopole to validate the proposed antenna. Simulated and measured -10 dB bandwidths of 27 and 24 GHz were obtained, respectively. The peak simulated efficiency and realized gain were 95.37% and 4.6 dBi.

Teses
supervisionadas

2017

Implementação em FPGA de um conversor HDMI para transmissão em série de alta velocidade

Autor
Ana Marisa Oliveira Barbosa

Instituição
UP-FEUP

2017

Effect of electromagnetic fields induced by mobile devices in the human brain

Autor
Vânia Filomena Madureira Vieira

Instituição
UP-FEUP

2017

Performance assessement of the DLPA in Radio Frequency Identification

Autor
Erick Delgado Lima

Instituição
UP-FEUP

2016

Software Defined Radar for Medical Imaging

Autor
Wilson José dos Santos Silva

Instituição
UP-FEUP

2016

Therapeutic Applications of Electromagnetic Radiation

Autor
Joana da Silva Gomes

Instituição
UP-FEUP