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Hybrid frequency selective surface phase cancelation structure based broadband switchable radar cross section reduction
International Journal of RF and Microwave Computer-Aided Engineering ( IF 1.7 ) Pub Date : 2021-01-19 , DOI: 10.1002/mmce.22554
Priyanka Das 1 , Kaushik Mandal 2
Affiliation  

In this paper, a switchable radar cross section (RCS) reduction between the two broadbands' (1‐7 GHz and 4‐10 GHz) has been achieved by just considering the integration of hybrid frequency selective surface (FSS) based phase cancelation structure (PCS) with a modified ground square patch antenna operating at 2.4 GHz. The full metallic ground plane of the conventional microstrip antenna (MSA) is replaced by a 2 × 2 array of band‐stop FSS having the same frequency as that of the MSA. This ground plane modification helps to increase the maximum out‐of‐band RCS reduction from 16.4 dB to 20 dB. The ground modified MSA without any PCS exhibits both in‐band and out‐of‐band maximum RCS reduction of 20 dB over a wideband (1‐7 GHz). A new approach is adopted to form the PCS. It is formed by placing two non‐overlapping hybrid FSSs at different heights above the MSA. The MSA with FSS based ground plane along with the hybrid FSS based PCS exhibits good monostatic and bistatic RCS reduction across 4 to 10 GHz without affecting the radiation characteristics of the conventional MSA. The measured results show a close resemblance to the simulated ones.

中文翻译:

基于混合频率选择性表面相位抵消结构的宽带可切换雷达截面缩减

在本文中,仅考虑了基于混合频率选择表面(FSS)的相位抵消结构的集成,就实现了两个宽带(1-7 GHz和4-10 GHz)之间可切换雷达横截面(RCS)的减小( PCS),并带有工作在2.4 GHz的改进的方形接地贴片天线。常规微带天线(MSA)的整个金属接地平面被具有与MSA相同频率的2×2带阻FSS阵列代替。修改接地平面有助于将最大带外RCS减小从16.4 dB增加到20 dB。没有任何PCS的经过地面修改的MSA在宽带(1-7 GHz)上具有20 dB的带内和带外最大RCS降低。采用一种新方法来形成PCS。它是通过在MSA上方不同高度放置两个不重叠的混合FSS形成的。具有基于FSS的接地平面的MSA以及基于FSS的混合PCS在4至10 GHz范围内均表现出良好的单静态和双静态RCS降低,而不会影响常规MSA的辐射特性。测量结果与模拟结果非常相似。
更新日期:2021-02-09
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