A C-Band Polarization Conversion Metasurface Antenna With Broadband RCS Reduction
Hao Luo, Shige Wei, Huarui Zhang, Ke Gong, Qing Liu
Abstract
A chessboard-shaped Polarization Conversion Metasurface (PCM) is designed based on the proposed miniaturized concept. This metasurface utilizes the principle of phase cancellation to significantly reduce the radar cross section (RCS). It consists of adjacent elements with three patterns and two layers of substrate, creating a low-profile broadband antenna for the C-band with a bandwidth of 5.8-7.9 GHz (35%). A key feature of the chessboard-shaped PCM is its reduced size. The antenna unit based on this PCM exhibits a compact design and a wide RCS reduction range, facilitating the seamless assembly of low-RCS antenna arrays. Additionally, the chessboard-shaped PCM suppresses scattering and enhances antenna performance. This PCM plays a crucial role in achieving broad bandwidth and improved radiation directionality. Simulation tests show that within the frequency range of 4 to 13 GHz, the monostatic RCS of the array antenna is significantly reduced. This reduction indicates decreased visibility in radar detection, thereby enhancing stealth performance.