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Percorrer por autor "Santos, Hugo"

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  • Design of an anechoic chamber for W-Band and mmWave
    Publication . Pinho, Pedro; Santos, Hugo; Salgado, Henrique
    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.
    2020-05-13Artigo científico Acesso aberto Ver mais
  • Patch antenna-in-package for 5G communications with dual polarization and high isolation
    Publication . Santos, Hugo; Pinho, Pedro; Salgado, Henrique
    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.
    2020-07-29Artigo científico Acesso aberto Ver mais