Electromagnetic vector sensor arrays can track both the polarization and direction of arrival (DOA) of the impinging signals. For linear crossed-dipole arrays, as shown by our analysis, due to inherent limitation of the structure, it can only track one DOA parameter and two polarization parameters. For full 4-D (two DOA, and two polarization parameters) estimation, we could extend the linear crossed-dipole array to the planar case. In this article, instead of extending the array geometry, we replace the crossed-dipoles by tripoles and construct a linear tripole array. Detailed proof shows that such a structure can estimate the 2-D DOA and 2-D polarization information effectively in general. A brief comparison between the planar crossed-dipole array and the linear tripole array is performed at last, showing that although the planar structure has a better performance, it is achieved at the cost of increased physical size.

中文翻译：

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使用交叉偶极子和三极子传感器阵列进行联合 DOA 和极化估计

电磁矢量传感器阵列可以跟踪入射信号的极化和到达方向 (DOA)。对于线性交叉偶极子阵列，如我们的分析所示，由于结构的固有限制，它只能跟踪一个 DOA 参数和两个极化参数。对于全 4-D（两个 DOA 和两个极化参数）估计，我们可以将线性交叉偶极子阵列扩展到平面情况。在本文中，我们没有扩展阵列几何形状，而是用三极杆替换交叉偶极子并构建线性三极杆阵列。详细的证明表明，这种结构通常可以有效地估计二维 DOA 和二维偏振信息。最后对平面交叉偶极子阵列和线性三极子阵列进行了简单的比较，