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The study of the microwave shielding properties of various screen configurations

This paper addresses the issue of limiting exposure of living matter to electromagnetic fields in the microwave range. One area which has developed relatively recently is that of materials used in shielding of electromagnetic fields, and their manufacturing techniques. In general there are preferred metallic components with high electrical conductivity, but there are also employed ferromagnetic metals or amorphous wires. Current research on composite materials are mainly directed towards the technological and experimental aspects regarding the electromagnetic properties. The high costs of experimental research regarding the effectiveness of these materials have turned our attention to some aspects of analyzing the electromagnetic properties using simulation. Within this research, there were studied the microwaves shielding properties for two configurations of screens comprised of thin metal wires arranged vertically, and in two orthogonal directions, respectively. For each of the two configurations, there was studied the impact of wires density on the screening efficiency. It has established the existence of a high degree of correlation between the screen shielding effectiveness and its transparency, defined as the ratio between free surface area and the total surface area of a mesh cell.