Design of Polarization Insensitive Frequency Selective Surface for Electromagnetic Shielding Application

In this paper, a low profile Frequency Selective Surface is presented, for obtaining electromagnetic shielding in four distinct frequency regions. The designed structure consists of three rectangular strips Resonators, Jerusalem cross in the top side and diagonal metallic strips on bottom side of the dielectric. The proposed structure provides electromagnetic shielding at 9.9 GHz, 12.3 GHz, 13.5 GHz, and 16.4 GHz frequency regions. Besides these frequency regions, we also obtain five transparent windows suitable for telemetry application. The prototype of the proposed structure is fabricated. It is observed that the measured results are nearly similar to simulated results because of minor fabrication errors. Furthermore, the proposed low profile structure can be deployed for applications like radome, spatial filters, antenna reflectors, and RCS reductions.