Sistema de antenas Microstrip en bandas UHF, mediante modulación OFDM para la recepción de señales TDT

Abstract

The current research project is focused on the design and implementation of two models of microstrip antennas. As a starting point, the structure is directed to fractal geometry whose operating range consists of two defined parts from 690 MHz to 1.4 GHz and its complement from 2.5 GHz to 6 GHz. The objective of the present work is to use two microstrip antennas in order to communicate at high frequencies, for this reason, the construction was carried out by using the CST Studio Suite 2019 simulation software and verifying the correct operation based on printed prototypes on a single-sided FR-4 substrate plate. In the same way, a graphical interface was developed to provide all the processes of the ISDB-Tb protocol through OFDM digital modulation. In terms of tests and operation, a signal generator (Anritsu MG3690C) and a spectrum analyzer (DEVISER E8600B) were used. Particularly, all measurements were made in the microwave laboratory and tabulations of the antennas which indicate the results according to the design and the considered methodology that serves as an application in wireless communications with respect to relatively short distances.