A Metamaterial-based Absorptive Reflector Improved Angular Stability

Abstract

Reflector antennas have attracted a great deal of attention thanks to its simplicity and superior performance compared with the conventional antennas. In this work, an absorptive reflector based on three-dimensional periodic metamaterials structure is proposed for angular stability improvement. It can be used as the ground plane of reflector antenna to reduce the out-of-band radar cross section (RCS) and the device exhibits two stable electromagnetic wave absorption bands under both TE- and TM-polarized wave for a maximum incident angle of 50 degree.