A novel low‐radar cross section (RCS) microstrip antenna with radiation performance and antenna volume maintained is proposed in this paper. Different from other antenna RCS reduction methods, the proposed antenna applies shaping method on frequency selective surface (FSS) ground plate to achieve further RCS reduction. In order to obtain the effect of subtracting square slots, an antenna with normal FSS ground is designed as reference antenna. The modified antenna with slotted FSS ground shows more significant RCS reduction compared with reference antenna in the frequency range 4 to 7.5 GHz, the maximum RCS reduction is 14.62 dBsm at 4.22 GHz. And the gain of the modified antenna is increased about 0.2 dB in contrast with the reference antenna. Besides, the modified and reference antenna are fabricated and measured. It is shown that the simulation and measured results are in good agreement.

中文翻译：

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基于缝隙频率选择性表面的新型低雷达截面微带天线

本文提出了一种具有辐射性能和保持天线体积的新型低雷达截面微带天线。与其他天线RCS降低方法不同，拟议的天线在频率选择表面（FSS）接地板上应用整形方法以实现进一步的RCS降低。为了获得减去正方形缝隙的效果，将具有正常FSS接地的天线设计为参考天线。在4至7.5 GHz频率范围内，带有开槽FSS接地的改进型天线与参考天线相比显示出更大的RCS降低，在4.22 GHz时最大RCS降低为14.62 dBsm。与参考天线相比，改进型天线的增益增加了约0.2 dB。此外，还制造并测量了修改后的参考天线。