提出了一种能在较宽频带范围内减缩微带贴片天线雷达散射截面(RCS)的新结构。该结构通过对天线贴片开圆形 槽和横槽减缩高频段的RCS,结合对接地板开纵槽减缩低频段的RCS,从而实现了整个频带内RCS的有效减缩。理论分 析和仿真、实测结果表明,该结构在保证天线辐射性能的同时,对2 GHz ~8 GHz 频段有较大幅度的RCS减缩,最大减缩值 达27.16 dB。

A novel structure for reducing the radar cross section (RCS) of microstrip patch antenna within a broad band is proposed . By cutting circular slots and horizontal slot in the patch, the RCS of microstrip antenna in higher frequency band is reduced, simultaneously, the vertical slots in the ground reduce the RCS in lower frequency range, so a good low-RCS behavior in the whole frequency band is obtained. Theory analysis, simulation and experiment results demonstrate that this structure can not only guarantee the antenna radiation performance, but also shows a significant RCS reduction in the frequency from 2 GHz to 8 GHz, the largest reduction is up to 27.16 dB.

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