Wideband low RCS Patch Antenna With Chessboard AMC

This paper proposes a wideband patch antenna with a low radio cross section(RCS). The proposed antenna consists of a checkerboard artificial magnetic conductor (CAMC) and a patch antenna, and the investigated CAMC antenna achieves broadband low RCS. The proposed CAMC comprises two different AMC unit cells. Due to the phase variations between these two AMC unit cells can reach 180° (±30°) from 9.3 to 17.6 GHz, the CAMC patch antenna can realize low RCS in wideband. The simulation and measurement results show that compared to an antenna without AMC, the proposed CAMC antenna RCS can be reduced by more than 5 dB from 8.6 to 18.2GHz. Moreover, the bandwidth is extended by 300 MHz, and the maximum gain is increased by 1.9 dB.