In this article, challenges and limitations of using cross-polarization suppression methods for dual-linear polarization antenna arrays are presented. A simple probe-fed patch antenna and high-performance, dual-polarized hybrid-fed patch antennas are used for this article. The image feed method is used for improving the cross-polarization level and increasing the geometrical symmetry of a very large phased array antenna. It is shown that decomposing the antenna radiation pattern to its even and odd components for calculating $2\times $ 2-element subarray radiation pattern has fundamental limitations and none of four different $2\times $ 2-element and $4\times $ 4-element subarray configurations will entirely suppress the sidelobe issue of configured arrays. The accuracy of using embedded element pattern for calculating the radiation pattern of very large array antennas with identical subarrays is studied, and an accurate procedure for predicting array antenna radiation pattern is proposed. The appearance of undesired sidelobes has been examined, and optimal design for mitigating the sidelobe issue associated with the large array of identical subarrays with image configuration is presented.

中文翻译：

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使用相同子阵列的双极化天线阵列中交叉极化抑制的挑战和局限性

在本文中，介绍了对双线性极化天线阵列使用交叉极化抑制方法的挑战和局限性。本文使用了一个简单的探针馈电贴片天线和高性能、双极化混合馈电贴片天线。图像馈送方法用于提高超大相控阵天线的交叉极化水平和增加几何对称性。结果表明，将天线辐射方向图分解为其偶数和奇数分量进行计算 $2\times $ 2 元子阵辐射方向图有基本的局限性，四种不同的 $2\times $ 2 元素和 $4\times $ 4 单元子阵列配置将完全抑制配置阵列的旁瓣问题。研究了使用嵌入单元方向图计算具有相同子阵的超大阵列天线辐射方向图的精度，提出了一种准确预测阵列天线辐射方向图的方法。已经检查了不需要的旁瓣的出现，并且提出了用于减轻与具有图像配置的相同子阵列的大阵列相关联的旁瓣问题的优化设计。