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Optimal Design of Wideband Microwave Absorber Consisting of Resistive Meta-Surface Layers

Author(s): Sining Zhou | Zhengbin Wang | Yijun Feng

Journal: Journal of Electromagnetic Analysis and Applications
ISSN 1942-0730

Volume: 04;
Issue: 05;
Start page: 187;
Date: 2012;
Original page

Keywords: Microwave Absorber | Meta-surface | Transmission Line Model | Genetic Algorithm

In this paper we propose an optimal design of ultra-wideband (4 ~ 20 GHz) microwave absorbers consisting of two resistive meta-surface layers of different square patch arrays. Gradient Descent and Genetic Algorithm numerical methods are employed to optimize all the parameters through equivalent transmission line circuit model. The circuit parameters are then implemented by a multilayer including two resistive meta-surfaces of square patch structures. Two types of such absorbing structures, with the total thicknesses close to that of the known theoretical limit, are designed and their performance are verified by full wave electromagnetic simulation.
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