A novel analytical method has been proposed to compute radiation mode RCS of phased arrays. The array RCS is computed by tracing the path of an impinging EM signal as it travels through the array system. The scattered field contribution from each component of array and its feed network is expressed in terms of the reflection and transmission coefficients. The individual contributions are then coherently superimposed to arrive at total array RCS. The proposed method can be used to obtain the radiation mode RCS of any conventional phased array or low profile patch array with high impedance surface (HIS)-based substrate or superstrate. Results are shown for dipole array with parallel feed network, corporate-fed patch array with conventional metallic ground plane and HIS-based hybrid ground plane. This approach is applicable for estimation and control of radiation mode RCS of any type of phased array.

中文翻译：

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相控阵辐射模式雷达截面 (RCS) 的分析估计

已经提出了一种新的分析方法来计算相控阵的辐射模式RCS。阵列 RCS 是通过跟踪撞击 EM 信号穿过阵列系统时的路径来计算的。阵列每个组件及其馈电网络的散射场贡献以反射和透射系数表示。然后将各个贡献相干叠加以达到总阵列 RCS。所提出的方法可用于获得任何传统相控阵或具有高阻抗表面 (HIS) 基片或覆板的低剖面贴片阵列的辐射模式 RCS。结果显示为具有并行馈电网络的偶极子阵列、具有传统金属接地平面的企业馈电贴片阵列和基于 HIS 的混合接地平面。