Projeto e construção de uma rede de antenas em banda S para nanossatélites

Abstract

This document describes the design and fabrication of a 2x2 antenna array to operate at 2.26 GHz and with rigth-handed circular polarization (RHCP). This antenna array is designed to be integrated onto the mock-up of the CONASAT nano-satellite to serve as the downlink antenna for the transponder. The work is composed of a literature review, introducing the basics of microstrip antennas, considering design, operating principles and electromagnetic performance limitations. Besides, its usual feeding methods are discussed. A brief discussion on the array theory is also presented. The design and construction of a single element is discussed and its simulated results on ANSYS HFSS and measured data are shown. In addition, an analysis of the geometric arrangement of the array elements is presented considering two scenarios: elements with sequential rotation and progressive phase shift and without sequential rotation.