The effects of gaps in ferrite tiles on both absorber and chamber performance

Abstract

In this paper, we present a model that accounts for the gaps between ferrite tiles which occur during the installation of the tiles in anechoic chambers. With this model we investigate the effect of gaps on both the performance of the tiles and the degradation of the chamber performance due to the gaps. It is shown that small gaps can cause large changes (as much as 5 to 10 dB) in the reflectivity, especially at the lower frequency end. It is also shown that small gaps can cause variations in chamber performance, and these variations can have a detrimental effect on the ability of the chamber to meet its performance specification.