Low-Profile Array With Reduced Radar Cross Section by Using Hybrid Frequency Selective Surfaces
Low-Profile Array With Reduced Radar Cross Section by Using Hybrid Frequency Selective Surfaces
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DOI：
10.1109/tap.2012.2189701
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发表时间：
2012-05-01
影响因子：
5.7
通讯作者：
Monorchio, Agostino
中科院分区：
文献类型：
--
作者：
Genovesi, Simone;Costa, Filippo;Monorchio, Agostino
提出了一种基于频率选择表面（FSS）的微带天线雷达散射截面（RCS）减小方法。该目标是通过用包括合适的FSS的混合结构代替器件的固体接地平面来实现的。利用周期矩量法分析了混合接地平面在平面波照射下的行为，并采用传输线等效电路对其进行建模。类似地，准TEM模式沿着阵列的修改的馈电线的传播由表面波的等效电路表示。这两个简化分析为混合地基结构的设计提供了有用的准则。所提出的解决方案保证了目标的带外雷达特征信号的减少，同时保持所需的低剖面阵列的带内辐射特性。与采用不同接地层的替代配置进行仔细比较，揭示了所提议设计的上级性能。在一个已实现的原型上的测量显示出良好的协议与模拟，并证明了设计方法的可靠性。
A solution for reducing the radar cross section (RCS) of amicrostrip antenna based on the use of frequency selective surfaces (FSSs) is described. The goal is accomplished by replacing the solid ground plane of the device with a hybrid structure comprising a suitable FSS. The behavior of the hybrid ground plane illuminated by a plane wave is analyzed by using a periodic method of moments (PMM), and it is modeled by resorting to a transmission- line equivalent circuit. Similarly, the propagation of the quasi-TEM mode along the modified feeding line of the array is represented by an equivalent circuit for surface waves. The two simplified analyses provide useful design criteria for the hybrid ground structure. The presented solution guarantees a decrease of the out-of-band radar signature of the target while preserving the desired in-band radiation characteristics of the low-profile array. A careful comparison to alternative configurations employing different ground planes has revealed the superior performance of the proposed design. Measurements on a realized prototype show a good agreement with simulations and prove the reliability of the design approach.