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Sobre

Henrique M. Salgado graduou-se em Física Aplicada (Óptica e Eletrônica) na Universidade do Porto em 1985 e recebeu o grau de doutoramento em Engenharia Eletrónica e Sistemas Informáticos pela University of Wales em 1993. Ingressou no Departamento de Engenharia Elétrica e Informática da Universidade do Porto em 1999 como Professor Auxiliar Convidado e em 2003 tornou-se Professor Associado. Desde 1995 que dirige a área de Óptica e Eletrónica do INESC TEC, sendo responsável por vários projetos de investigação nacionais e internacionais (Europeus) e contratos com a indústria . De 1997 a 1999, foi Investigador Principal no Department of Electrical and Electronic Engineering of the University College London, Reino Unido e anteriormente Investigador Auxiliar na School of Electronic Engineering and Computer Systems, Bangor, Reino Unido. Ele é o autor e co-autor de enúmeras publicações internacionais no campo das comunicações de fibra óptica e microondas. Os seus atuais interesses de pesquisa incluem: tecnologia de rádio sobre fibra e fotónica de microondas, equalização digital em sistemas ópticos coerentes, redes totalmente ópticas, modelação de não-linearidades e projeto de antenas compactas multibanda. Ele é membro da Photonics Society e Communications Society do IEEE.

Tópicos
de interesse
Detalhes

Detalhes

021
Publicações

2020

Patch antenna-in-package for 5G communications with dual polarization and high isolation

Autores
Santos, H; Pinho, P; Salgado, H;

Publicação
Electronics (Switzerland)

Abstract
In this paper, we describe the design of a dual polarized packaged patch antenna for 5G communications with improved isolation and bandwidth for K-band. We introduce a differential feeding technique and a heuristic-based design of a matching network applied to a single layer patch antenna with parasitic elements. This approach resulted in broader bandwidth, reduced layer count, improved isolation and radiation pattern stability. The results were validated through finite element method (FEM) and method of moments (MoM) simulations. A peak gain of 5 dBi, isolation above 40 dB and a radiation efficiency of 60% were obtained. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

2020

Design of an Anechoic Chamber for W-Band and mmWave

Autores
Pinho, P; Santos, H; Salgado, H;

Publicação
ELECTRONICS

Abstract
In this paper, we describe the design of an electrically large anechoic chamber for usage on millimetre-wave bands. Ansys Savant sotware was used to perform a simulation of the chamber, using physical optics coupled with uniform theory of diffraction (PO/UTD). Moreover, a method based on an open waveguide probe is described in this paper to obtain the electrical properties of the RF absorbers at millimetre-wave frequencies. Two different source antennas were simulated in this work and the corresponding quiet zones predicted. The largest quiet zone was 30 mm x 30 mm x 50mm, for a chamber size of 1.2 m x 0.6 m x 0.6 m.

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

2019

Meander-Line Monopole Antenna With Compact Ground Plane for a Bluetooth System-in-Package

Autores
Santos, HM; Pinho, P; Silva, RP; Pinheiro, M; Salgado, HM;

Publicação
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS

Abstract
In this letter, a packaged compact meander-line monopole antenna for Bluetooth communications, manufactured in low-density fan-out technology, is presented. A combined size for the antenna and ground plane of 0.1 lambda(0) x 0.06 lambda(0) x 0.008 lambda(0) is obtained. Such small antennas are usually designed considering their connection to an evaluation board with a large ground plane, which improves their gain and bandwidth, but in this letter, the antenna is designed so it can work standalone without any further connection to printed circuit boards. The challenge of designing such a compact antenna is surpassed by performing a detailed modeling of the radiating meander-line element altogether with its finite ground plane, a tuning inductor, and an inductive coupling feed. The antenna model is developed in Ansys HFSS using the finite element method, which is later validated experimentally. Measurements of the return loss radiation pattern are carried out, and final results show a -6 dB bandwidth of approximately 110 MHz and a gain of -8.7 dBi, at 2.42 GHz.

Teses
supervisionadas

2019

Comunicações Óticas de Alto Débito Subaquáticas

Autor
João Henrique Melro Araújo

Instituição
IPP-ISEP

2019

Desenho de antena mecanicamente flexível para segmento "2 wheeler" multimedia

Autor
Mafalda Pereira Varela

Instituição
UP-FEUP

2019

Antenna Design for Underwater Applications

Autor
Oluyomi Aboderin

Instituição
UP-FEUP

2019

Antenna Design for Integration into Active Devices Targeting 5G and Beyond

Autor
Hugo Miguel Guedes Pereira dos Santos

Instituição
UP-FEUP

2019

Antena em "package" para radares em automóveis na banda W

Autor
Filipa Gomes Raimundo

Instituição
UP-FEUP