Frequency Selective Surfaces (FSS), Absorbers and Rasorbers: Theory and Approach

Abstract

The field of electromagnetic wave manipulation and control is based on the essential elements of frequency selective surfaces (FSS), absorbers, and rasorbers. When designing radomes, frequency-selective surfaces (FSSs) are often utilized as spatial filters for incoming electromagnetic (EM) waves to protect the antennas and lower the radar cross-section (RCS) of the antenna system. The frequency-selective rasorber (FSR) was designed in this study. We employed strategies like Frequency-Selective Surface (FSS), Lossy layer, and ANSYS HFSS Resonator to develop FSR. The power loss, far-field directivity, and electric field in the antenna at frequencies of 2 and 14 GHz are all shown in the experimental result. It was demonstrated that at frequency 2 GHz, the greatest power loss is 76087.1 W/m3 and the smallest loss is 0 W/m3. The greatest loss at frequency 14 GHz is 539233 W/m3 and the smallest loss is 0 W/m3. We could expect further advancements in the way we harness and regulate electromagnetic waves for the benefit of society as researchers continue to improve and invent these technologies.