Optimum design of N sheet capactive Jaumann absorber using genetic algorithm

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI:10.1109/APS.1997.625428

A. Cheldavi, M. Kamarei

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引用次数: 8

Abstract

An optimum design for N(arbitrary)-sheet capacitive Jaumann electromagnetic (EM) wave absorber, using the genetic algorithm is presented. This algorithm is a random optimization method. We show the bandwidth for two-sheet capacity Jaumann absorber can be expanded even more than 108% as showed by Knott (see IEEE Trans.AP, vol.43, no.11, 1995), by using this algorithm and without imposing the double-notch design criteria. We also show that our results approaches Knott's results when we restrict the characteristic impedances and lengths of the lines to vary within a very short range. We also design one-sheet and three-sheet capacitive Jaumann absorbers. Finally we obtain a 20-dB attenuation bandwidth of more than 145% for one-sheet, 173% for two-sheet and 193% for three-sheet capacitive Jaumann EM absorbers, with some acceptable short range for the variables. We design the one-sheet and two-sheet capacitive Jaumann absorbers at low frequency and the three-sheet at high frequency. The 20-dB attenuation bandwidth obtained for the one-sheet and two-sheet capacitive Jaumann absorbers are respectively, from 10 to 77 MHz and, from 4 to 61 MHz. For the three-sheet capacitive Jaumann absorber the 20-dB attenuation bandwidth obtained is from 0.8 GHz to 280 GHz.

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基于遗传算法的N片电容式jaaumann吸收体优化设计

提出了一种基于遗传算法的N(任意)片电容式焦曼电磁波吸收器的优化设计方法。该算法是一种随机优化方法。我们展示了双片容量的jaaumann吸收器的带宽可以扩展甚至超过108%，如Knott所示(参见IEEE Trans。AP，第43卷，no。11, 1995)，通过使用该算法，而不强加双缺口设计准则。我们还表明，当我们限制特征阻抗和线的长度在很短的范围内变化时，我们的结果接近Knott的结果。我们还设计了单片和三片电容式约曼吸收器。最后，我们获得了20 db衰减带宽，单片电容式jaaumann电磁吸收器的衰减带宽超过145%，两片电容式jaaumann电磁吸收器的衰减带宽超过173%，三片电容式jaaumann电磁吸收器的衰减带宽超过193%，并且具有可接受的短范围。设计了单片、双片电容式低频吸收器和三片电容式高频吸收器。单片电容式和双片电容式jaaumann吸波器的20 db衰减带宽分别为10 ~ 77 MHz和4 ~ 61 MHz。对于三片电容式jaaumann吸收体，获得的20 db衰减带宽为0.8 GHz至280 GHz。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Antennas and Propagation Society International Symposium 1997. Digest

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