Design of a wide band Frequency Selective Surface (FSS) for multiband operation of reflector antenna

Abstract

This paper deals with the design of a Frequency Selective Surface (FSS) used as a sub reflector in a satellite. The FSS is designed by cutting slots in the square patch keeping same periodicity throughout. Frequency-selective surfaces are spatial filters which when incorporated as either flat or curved sub reflectors into a reflector antenna allows it to operate at a number of different frequency bands. This designed FSS structure has a wide stop band from 3.70GHz to 6.23GHz with percentage bandwidth of 51. Size reduction up to 83% is also achieved in this paper. Theoretical investigations have been done by Ansoft® designer software.

Double square loop FSS with slots for closer band spacing at oblique incidence

“…There is a large volume of published studies describing techniques to optimize FSS geometry to ensure that the structure is capable to provide multi resonance behavior with a higher packing density without compromising the angular stability [4]. There are various compact structures that were proposed in literature either as a bandstop or bandpass filter [5]- [7]. In this paper, a nested double square loop FSS is proposed with dual-band stop behavior.…”

Design of Polarization Insensitive Frequency Selective Surface for Electromagnetic Shielding Application

“…Frequency Selective surfaces (FSSs) are formed by periodic arrangements of identical resonant elements in 2D and 3D lattices. These resonant elements, patches, or apertures can allow or restrict the wave propagation in specific frequency bands [1][2][3][4]. In several space missions, a sub-reflector made of an FSS was an inevitable part of the antenna unit.…”