Implementación de una cámara anecoica utilizando materiales de blindaje y absorbentes para las bandas de frecuencias GSM, LTE y WIFI SUB 6 GHz para el laboratorio de microondas de la FIE.

Abstract

The objective of this degree work was to investigate the theory of electromagnetic shielding, basic concepts that were later applied in the selection process of materials with absorbent and reflective characteristics. The measurements and tests of the materials were carried out by means of power measurements inside an existing anechoic chamber in the microwave laboratory in the Informatics and Electronics Faculty. Among the equipment used was the Anritsu MF3692C signal generator, the Anritsu MS2724C spectrum analyzer, and the HyperLOG 30180 and 7060 log-periodic antennas as transmitter and receiver, respectively. Through the spectrum generator connected to the transmitting antenna, signals with frequency variations at 2.4GHz, 3GHz, 4GHz, 5GHz and 6GHz were emitted and through the receiving antenna connected to the spectrum analyzer, the gain of the received signal was verified by placing a material in the middle of the transmitter and receiver, from which measurements were obtained that allowed choosing flex foam and egg trays as absorbent materials and galvanized tol and chova alumband as reflective materials. With the selected materials, the anechoic chamber of dimensions 2.0x2.0x3.0 meters was designed and built, which was covered inside with flex foam in the first layer and in the second layer with egg trays, while outside the galvanized tol was placed and on top of it a layer of chova alumband. It was concluded by forming a completely closed and isolated structure for the frequency range from 2.4GHz to 6GHz, the band in which GSM, LTE and Wi-Fi technologies operate. It is recommended to implement a control and monitoring system, which allows the visualization and control of the events developed inside the anechoic chamber.