Papers by Henrique Salgado
OCEANS 2019 - Marseille
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Wireless Mesh Networks - Security, Architectures and Protocols
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2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)
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Electronics, 2020
In this paper, we describe the design of a dual polarized packaged patch antenna for 5G communica... more 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.
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This work presents an Inverted-L antenna design using the fractal geometry for dual band WLAN (2.... more This work presents an Inverted-L antenna design using the fractal geometry for dual band WLAN (2.4/5.2GHz) USB dongle application. The proposed antenna has the advantages of compact size, wide operation bandwidth and easy fabrication. The experimental results show that it has a S11
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André Oliveira Tekever, Portugal, andre.oliveira@tekever.com
Pedro Sinogas Tekever, Portugal, pe... more André Oliveira Tekever, Portugal, andre.oliveira@tekever.com
Pedro Sinogas Tekever, Portugal, pedro.sinogas@tekever.com Stefan Taing Munich Innovation Group, Germany, st@munich-innovation.com Jens Elsner Munich Innovation Group, Germany, je@munich-innovation.com Simon Watts Avanti Communications Group plc, United Kingdom, simon.watts@avantiplc.com Valentine Boissinot Avanti Communications Group plc, United Kingdom, valentine.boissinot@avantiplc.com Henrique M. Salgado INESC TEC and Faculty of Engineering, University of Porto, Portugal, henrique.salgado@inescporto.pt João Canas Ferreira INESC TEC and Faculty of Engineering, University of Porto, Portugal, joao.c.ferreira@inescporto.pt Luis Pessoa INESC TEC, Portugal, luis.m.pessoa@inescporto.pt José Machado da Silva INESC TEC and Faculty of Engineering, University of Porto, Portugal, jose.m.silva@inescporto.pt
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Applied Sciences, 2021
The design of a uniformly spaced 1 × 4 linear antenna array using epitaxial layers of benzocyclob... more The design of a uniformly spaced 1 × 4 linear antenna array using epitaxial layers of benzocyclobutene over an InP substrate is demonstrated. The array elements are conjugately matched with a uni-travelling carrier photodiode at the input. The phased array is optimised to counteract mutual coupling effects by introducing metal strips with isolated ground planes for each radiating element. The proposed antenna array can provide a gain of 10 dBi with a gain variation of ±3 dB. The array operates over a bandwidth of 10 GHz (295–305 GHz) with a wide scanning angle of 100° in the broadside.
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Electronics, 2020
In this paper, we describe the design of an electrically large anechoic chamber for usage on mill... more 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 m m × 30 m m × 50 m m , for a chamber size of 1.2 m m × 0.6 m m × 0.6 m .
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Optics Express, 2019
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Microwave and Optical Technology Letters, 2019
Optical modulation characteristics of resonant tunneling diode photodetectors (RTD‐PD) are invest... more 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.
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Journal of Lightwave Technology, 2017
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Microwave and Optical Technology Letters
ABSTRACT
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Optoelectronics - Materials and Devices, 2015
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Optics Communications, 2006
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Proceedings of SPIE - The International Society for Optical Engineering, 2013
ABSTRACT Achieving affordable high speed fiber optic communication networks for airplane systems ... more ABSTRACT Achieving affordable high speed fiber optic communication networks for airplane systems has proved to be challenging. In this paper we describe a summary of the EU Framework 7 project DAPHNE (Developing Aircraft Photonic Networks). DAPHNE aimed to exploit photonic technology from terrestrial communications networks, and then develop and optimize aircraft photonic networks to take advantage of the potential cost savings. The main areas of emphasis were on: multiplexing networks; providing standard components; simplifying installation; and reducing through life support costs. DAPHNE (fifteen partners from seven nations) finished in February 2013; and was supported by the European Commission‟s Seventh Framework Programme, although the consortium members are continuing with in-house developments.
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Sensors, 2013
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Optics Letters, 2005
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Optics Communications, 2006
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Optics Communications, 2006
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Microwave and Optical Technology Letters, 2006
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Papers by Henrique Salgado