Optimum Design of N Sheet Capacitive Jaumann Absorber Using Genetic Algorithm
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概要
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An optimun design for N (arbitrary)-sheet capacitive Jaumann eletromagnetic (EM) wave absorber, using genetic algorithm will be presented. This algorithm is a random optimization method based on the genetic relation in the human being. We show the bandwidth for two-sheet capacitive Jaumann absorber can be expanded even more than 108% showed by knott, 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 character istic impedances and lengths of the lines to vary within a very short range. We also desigrn one-sheet and three-sheet capacitive Jaumann absorbers. The only restriction used here is about the meaningful range for the design variables. The goal of this algorithm is that we can impose arbitrary restriction about the range of the variation of the variables. So we can see the performance behaviour with the range dimension of the variables, and we can obtain different optimum results for different ranges. Finally we obtain a 20-dB attenuation bandwidth more than 145% for one-sheet, 173% for two-sheet (compare with 108% obtained in [1]) 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.
- 一般社団法人電子情報通信学会の論文
- 1999-04-25
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関連論文
- First Order Approximation of the Exact Solution of Arbitrary Nonuniform Transmission Lines: Application in High Speed Integrated Circuits
- Optimum Design of N Sheet Capacitive Jaumann Absorber Using Genetic Algorithm