Cookies Policy
The website need some cookies and similar means to function. If you permit us, we will use those means to collect data on your visits for aggregated statistics to improve our service. Find out More
Accept Reject
  • Menu
About

About

Hugo Santos obtained his MSc degree in FEUP, specializing in communication technologies. He is a MAP-Tele PhD student and researcher in the OET (Optical and Electronic Technologies) group of CTM. His main interests include, among others, RF and microwave engineering, electrically small antennas, on-package and on-chip antennas for mm-Wave, antenna arrays and wireless power transmission.

Interest
Topics
Details

Details

004
Publications

2020

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

Authors
Santos, H; Pinho, P; Salgado, H;

Publication
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

Authors
Pinho, P; Santos, H; Salgado, H;

Publication
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

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

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

Publication
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.

2019

Scalable High-Gaussicity Split-Block Diagonal Horn Antenna for Integration with Sub-THz Devices

Authors
Santos, HM; Lima, ED; Pinho, P; Pessoa, LM; Moro Melgar, D; Salgado, HM;

Publication
2019 49TH EUROPEAN MICROWAVE CONFERENCE (EUMC)

Abstract
In this paper we propose a high-gaussicity spline-profiled horn antenna, which is scalable in length and aperture to achieve higher gains whilst retaining a high Gaussian efficiency. A novel approach is used where a PSO is used for optimizing the spline, using the gaussicities at the operating frequencies as the objective function, which further improves side-lobe level and cross-polarization when compared to the state-of-the-art. With the proposed method, which was validated through FEM simulations in HFSS, reflection coefficients below -15 dB, gains greater than 25 dBi and gaussicities above 91% were obtained in the entire WR-3 band.

2018

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

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

Publication
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.