This paper presents the study of a microstrip antenna to be installed onto meteorological nano-satellites. In order to increase the effective ground plane and to optimize the decoupling between the main and the cross polarizations, metallic strips were attached to the antenna ground plane. The antenna performance was evaluated using different types and sizes of metallic strips. An improvement in the front-to-back ratio whilst keeping good axial ratio performance was observed.
Resumo-Este artigo apresenta o projeto de uma topologia de transceptor de frequências para integração em nanossatélites. O objetivoé propor um circuito que receba o sinal, no canal de subida, em 401 MHz e o retransmita no canal de descida em 2,26 GHz. O artigo apresenta análise das seguintes questões: cenário de operação do nanossatélite, dimensionamento dos blocos do sistema e caracterização dos componentes.
In this letter, a study of a feeding technique applicable to cylindrical dielectric resonator antennas is presented. The feeding technique analyzed is based on vias glued at the lateral wall of the cylindrical resonator. A series of parametric studies, in terms of the orientation, position and dimensions of the vias, has been carried out to assess the sensitivity to imperfections of the fabrication process on the antenna parameters. In order to validate the computational results, a prototype has been manufactured and measured with a spherical near-field test facility. The results in terms of S-parameters and radiation pattern are presented and good agreement between simulations and measurements has been obtained.
In this paper, the design of an aperture-coupled microstrip antenna to be installed onto a nano-satellite is described. The proposed antenna has been optimized to operate at 2.26 GHz (S-Band), which is the operating frequency of the downlink channel of the Brazilian System for Meteorological Data Acquisition. The electromagnetic analysis is done by using HFSS software. For the design validation, prototypes were manufactured and the comparison between simulations and measurements indicates good performance of the proposed antenna.
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