Frequency Selective Surface Microwave Absorber for WLAN Applications

Abstract

Many researchers are studying electromagnetic wave absorbers. This is mainly due to the large number of existing wireless systems. The absorbers find numerous applications, from commercial to military systems. Allied to this, also the interest in Frequency Selective Surfaces (FSS), which are, basically, spatial filters, grows. Thus, this work proposes the use of FSS to design electromagnetic absorbers. In this study, Altair FEKO software was used. A parametric analysis is presented, demonstrating the understanding of the physical dimensions' effects. A prototype is built to validate the analysis performed. A good agreement between the numerical and experimental results is observed. Furthermore, measured results show that the absorber panel suppresses reflection (below-10 dB) from 1.97 GHz to 3.15 GHz, covering the entire ISM band.