Design of transparent and low RCS antenna based on absorbing metasurface

A transparent and low radar cross section (RCS) antenna based on absorbing metasurface is presented. The ground and radiation patch of the antenna are made of indium tin oxide (ITO) conductive film with low square resistance, the substrate is made of transparent glass material, and the transparent absorbing structures with high square resistance are arranged around the transparent radiation patch. The simulation results indicate that the proposed antenna works at 8.88GHz. It possesses remarkable RCS reduction from 8GHz to 12GHz compared with the original antenna. The minimum reduction is 10dB. Moreover, the antenna has stable RCS reduction effect in the range of −20° to 20° of incident angle.