Analysis and Design of Frequency Selective Surface for Transmission in S band and Reflection in Ku Ka band for Satellite Communication

Abstract

Frequency selective surface FSS is an array of periodically arranged patches on the dielectric substrate apertures in the metallic screen which exhibits total reflection and transmissionrespectively despite of the fact that the patch/aperture is just a small fraction of the total FSS area. It is the most relevant periodic structurewhich finds various applications in microwave regime of the electromagnetic spectrum such as satellite communicationradio broadcastingradomeselectromagnetic shieldingimproving the purity of the received signal and enhancing the gain/directivity of the antenna. Howeverthe electromagnetic behavior of the FSS structures is a function of frequencyangleofincidence AOI and polarization of the incident waveswhich make it a potential candidate to use as spatial filters in variety of microwave applications such as radomes and satellite communication. The unitcell geometry of FSS structure that is used in the microwave regime of the electromagnetic spectrum has to be very simple because the fabrication cost is an important issue. In the microwave regime of electromagnetic spectrumthe development of novel geometrical shapes of FSS structures is an attractive area for researchers. In addition to thisthe miniaturization as well as angular and polarization stability of the structure are the potential issues. Thereforeit is required to design a FSS structurewhich provides a stable bandpass/bandstop filtering characteristics over a wide range of AOIs and over different perpendicular and parallel polarization states. newline