Diseño y simulación de una antena plana multiresonante para aplicaciones de radioastronomía en la banda SHF.

Abstract

This thesis presents the design and simulation of a multi-resonant flat antenna in the low SHF band for radio astronomy applications. In the first chapter, the main concepts of astronomy and radio astronomy are explained in a general way. First, the radio frequency systems currently used in radio astronomy are described: antennas, receivers, operating conditions, etc. Followed by detectable astronomical phenomena, frequency bands of interest, etc. The design process is described in chapter two. As a first step, the frequency band in which the antenna needs to work is selected, together with the elements that can be detected within it. With this information, it is decided to design a multi-resonant flat antenna comprised of triangular elements. In the third chapter, the modeling of the antenna and the feeding system is presented together with the allocation of materials in the HFSS electromagnetic simulation software. Next, the characteristics obtained from the antenna are analyzed: parameter S11, directivity, gain, radiation pattern, etc. To complement, an analysis of the behavior of the antenna in different feeding points is carried out. Finally, the conclusions and recommendations are compiled in chapter four.