A circularly polarized (CP) Fabry–Perot (FP) resonator antenna with well radar cross section (RCS) reduction property is presented in this article. Wideband and well in-band RCS reduction for both x- and y-polarized waves are obtained by the proposed antenna. A polarization conversion metasurface (PCM) is designed to make the antenna realize circularly polarized radiation and RCS reduction simultaneously. The PCM consists of two unit cells which show same polarization conversion capability but 180° reflection phases difference when the wave incident from the top side. The polarization conversion capability can make the antenna realize circularly polarized radiation, while the chessboard arrangement of two unit cells can reduce the RCS of the antenna. Besides, the high reflectivity of the PCM also make the antenna obtain high gain and well in-band RCS reduction property. The radiation and scattering performance of the antenna is verified by the measured results of the fabricated antenna. The antenna obtains maximum gain of 13.9 dBic at 10 GHz and average RCS reduction of 10 dB in the band of 6–16 GHz. Besides, the RCS reduction of the antenna at 10 GHz for both polarizations are all large than 14 dB.

中文翻译：

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具有良好 RCS 降低特性的圆极化法布里-珀罗天线

本文介绍了一种圆极化 (CP) 法布里-珀罗 (FP) 谐振器天线，具有很好的雷达截面 (RCS) 减少特性。x - 和y的宽带和良好的带内 RCS 降低-极化波是由所提出的天线获得的。设计极化转换超表面（PCM）使天线同时实现圆极化辐射和RCS降低。PCM 由两个单元电池组成，当波从顶部入射时，这两个单元电池显示出相同的偏振转换能力，但反射相位相差 180°。极化转换能力可以使天线实现圆极化辐射，而两个晶胞的棋盘式排列可以降低天线的RCS。此外，PCM的高反射率也使天线获得高增益和良好的带内RCS降低特性。通过制作天线的实测结果验证了天线的辐射和散射性能。天线获得最大增益 13。在 10 GHz 时为 9 dBic，在 6–16 GHz 频段中 RCS 平均降低 10 dB。此外，天线在 10 GHz 时两种极化的 RCS 衰减均大于 14 dB。