Array Optimization for Maximum Beam Collection Efficiency to an Arbitrary Receiving Plane in the Near Field
Array Optimization for Maximum Beam Collection Efficiency to an Arbitrary Receiving Plane in the Near Field
复制标题
任意接收面近场最大波束收集效率的阵列优化
DOI：
10.1109/ojap.2020.3044443
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发表时间：
2021
影响因子：
4
通讯作者：
S. Kojima;T. Mitani;N. Shinohara
中科院分区：
文献类型：
--
作者：
S. Kojima;T. Mitani;N. Shinohara
本文提出了一种使近场任意接收面的波束收集效率最大的阵列优化方法。所提出的方法认为，每个元素的阵列模式，因此，相互耦合的优化是可能的，通过使用有源元件模式。此外，由于优化问题以矢量形式计算，因此该方法可以考虑接收天线的极化方向。BCE最大化的问题归结为广义特征值问题，并且可以在数学上获得最佳解。在不同计算模型下的数值分析结果表明了该方法的有效性。然后，使用从电磁仿真获得的有源元件图案进行优化。通过与不考虑互耦的优化结果的比较，证实了采用有源元件方向图的方法具有更低的反射损耗和天线损耗，更高的BCE和传输效率。
In this article, an array optimization method for maximizing beam collection efficiency (BCE) to an arbitrary receiving plane in the near field is proposed. The proposed method considers each element pattern in an array; thus, optimization with mutual coupling is possible by using active element patterns. Besides, the proposed method can consider the polarization direction of a receiving antenna since the optimization problem is calculated in vector form. The problem of maximization of BCE boils down to the generalized eigenvalue problem, and the best solution can be obtained mathematically. The results obtained via numerical analysis in various calculation models indicate the validity of the proposed method. Optimization is then performed using the active element patterns obtained from electromagnetic simulation. Based on the comparison of the results without considering mutual coupling in the optimization, it is confirmed that the proposed method yields better results, such as lower reflection and antenna losses and higher BCE and transmission efficiency, by using active element patterns.