A Polarization Insensitive Triple Band Reject Frequency Selective Surface for the Reduction of Radar Cross Section

Abstract

In this work, a novel polarization insensitive Frequency Selective Surface (FSS) has been proposed that
employed reflection characteristics at selective frequency bands. In its designing, three different shape
loops are preferred that is square, dodecagon and octagon shaped elements and these loops are embedded
on the Teflon substrate, which worked as band reflective filter for the three frequency bands that are 3.6
GHz, 8.4 GHz and 11.4 GHz to reduce the radar cross section in X-band. Teflon material has qualitative
properties that it has very low loss tangent of 0.0002 and dielectric constant of 2.1 and size of substrate is
0.18 λ x 0.18 λ. The designed FSS has been simulated and analyzed through CST Microwave studio. This work
will employ band reject characteristics for 3.6 GHz, 8.4 GHz and 11.4 GHz frequency band. The simulated
results have stable resonant frequency response for both TE and TM mode that prove the polarization
independent behavior of the projected FSS