DESIGN AND ANALYSIS OF ARCHIMEDEAN SPIRAL ABSORBER FOR HIGH FREQUENCY MICROWAVE APPLICAITON

Abstract

We have examined the effectiveness of a two-arm Archimedean spiral as an absorber for high frequency microwave applications. The reported absorber consists of a copper-based two-arm Archimedean spiral structure on an FR-4 dielectric substrate with a metallic ground plane. The design and optimization of the proposed structure have been done with the Finite Element Method (FEM) using COMSOL Multiphysics Simulation Tools. The geometrical parameters of the structure have been optimized to achieve 99% absorption in the frequency range of 150- 200 GHz. The proposed absorber has potential application in reducing electromagnetic interference in various electronic devices, such as radars and wireless- communication.