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Superstrate-based patch antenna array with reduced in-band radar cross section
International Journal of Microwave and Wireless Technologies ( IF 1.4 ) Pub Date : 2021-06-16 , DOI: 10.1017/s1759078721000921
S. K. Vyshnavi Das , Avinash Singh , Arti A. Gurap , Hema Singh

To design a low radar cross section (RCS) antenna, the major concern is not only to reduce scattering, but also to maintain its radiation parameters, viz. gain, voltage standing wave ratio (VSWR), etc. This paper presents a simple configuration of low RCS microstrip patch array with a periodic structure-based superstrate. The ground of the array is designed as reduced ground plane with high impedance surface elements, viz. rectangular patch and Jerusalem cross. The configuration of superstrate consists of multilayered, viz., two-layered and three-layered structures having partially absorbing and reflecting surfaces. In both the proposed configurations, the array gain of 12.5 dB is maintained with reduced structural RCS over the entire in-band frequency range. The reflection coefficient (~ −20 dB) and VSWR (~ 1.1) of the array are maintained. It is shown that the proposed superstrate-based patch array design has significantly reduced in-band RCS (−18 dBsm) at its resonant frequency.



中文翻译:

带内雷达横截面减小的基于覆板的贴片天线阵列

要设计低雷达截面 (RCS) 天线,主要关注点不仅是减少散射,还要保持其辐射参数,即。增益、电压驻波比 (VSWR) 等。本文提出了一种具有基于周期性结构的覆板的低 RCS 微带贴片阵列的简单配置。阵列的接地设计为具有高阻抗表面元件的缩减接地平面,即。矩形补丁和耶路撒冷十字架。覆板的构造由多层结构组成,即具有部分吸收和反射表面的两层和三层结构。在两种建议的配置中,12.5 dB 的阵列增益在整个带内频率范围内保持结构 RCS 降低。保持阵列的反射系数 (~ -20 dB) 和 VSWR (~ 1.1)。

更新日期:2021-06-16
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