An Easily Optimizable Frequency Selective Absorber Design for X-Band

Abstract

In this paper, a novel frequency selective absorber surface (FSAS) is designed for electromagnetic and radio frequency interference reduction and for to use in stealth technology in X-band (8–12 GHz). At the proposed FSAS, minimum 10 dB reflection loss is achieved for the incidence angles up to 30 degrees. Lumped resistors are inserted into periodic conduction geometries to achieve absorption frequency behavior. Equivalent circuit model of periodic geometries is used in the design and optimization stages. The main advantage of the design is its resonance frequency can easily be optimized by one parameter which controls the equivalent capacitance. In order to achieve this goal, a novel FSAS geometry has been designed in which equivalent capacity is dominant in determining the resonant frequency of the surface.