A singular characteristic of single-layer frequency selective surface with the element optimized by GA
A singular characteristic of single-layer frequency selective surface with the element optimized by GA
复制标题
遗传算法优化单元单层频率选择表面的奇异特性
DOI：
10.1109/wct.2003.1321497
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
H. Shigesawa
中科院分区：
文献类型：
--
作者：
M. Ohira;H. Deguchi;M. Tsuji;H. Shigesawa
我们利用基于遗传算法（GA）的优化技术开发了多频带单层频率选择表面（FSS）。在这些 FSS 的斜入射频率响应中，会出现不需要的急剧下降，具体取决于元件形状。对于具有波长长度的偶极子元件，已经证实了类似的奇异特性。但对于由优化技术产生的具有复杂单元形状的FSS，尚未研究导致这种奇异特性的机制。本文阐明了FSS的奇异特性是如何在频率响应中出现的。首先，我们简要介绍了寻找具有不需要的急剧下降的奇异频率的方法，以及产生指定反射的谐振频率。然后，通过我们开发的FSS的例子，我们从电流分布解释了奇异特性的机制。最后通过实验证明了讨论的有效性。
We have developed multiband single-layer frequency selective surfaces (FSS) by using the optimization technique based on the genetic algorithm (GA). In the frequency responses of these FSS for oblique incidence, unwanted sharp dips appear, depending on the element shape. Similar singular characteristics have been confirmed for a dipole element with the length of a wavelength. But the mechanism causing such singular characteristics has not been investigated for the FSS with the complicated element shape produced by the optimization technique. This paper makes it clear how the singular characteristics of the FSS occur in the frequency response. Firstly, we show briefly the methods for finding the singular frequency with unwanted sharp dips, and also the resonant frequency yielding the specified reflection. Then, by using an example of the FSS developed by us, we explain the mechanism of the singular characteristics from the current distribution. Finally, the validity of the discussion is proved experimentally.