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首页> 外文期刊>Applied Computational Electromagnetics Society journal >An Optimized Microwave Absorber Geometry Based on Wedge Absorber
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An Optimized Microwave Absorber Geometry Based on Wedge Absorber

机译：基于楔形吸收器的微波吸收器几何优化

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摘要

Low reflectivity of microwave absorbers is important to improve the performance of anechoic chamber measurements. The shape of the absorber as well as the material used are among the main components to provide desired low reflection performance. Pyramidal and wedge-shaped absorbers are two of the most wellknown microwave absorber types. We discuss the effect of a convex shape on reflection performance of microwave absorbers and show that convex shape structure has significantly performance by absorbing most of the electromagnetic energy of the incident wave. We used a concavity theorem based design method to obtain a function for a convex shape. Absorbing structures have been analyzed by using the periodic moment method (PMM). An optimization method is employed to find coefficients of the convex function, which provides better absorption performance than the wedge type absorber. Reflection performances of the wedge and convex absorbers for the 2-12 GHz frequency band are compared. Their reflection performances at 2 GHz for different angles of incidence are presented. An important implication of this study is that the alternative absorber shapes other than the wedge shape are demonstrated by using simple mathematical methods to have the optimal reflection characteristics.
机译：微波吸收器的低反射率对于提高电波暗室测量的性能很重要。吸收体的形状以及所用材料是提供所需低反射性能的主要成分。金字塔形和楔形吸收体是最著名的两种微波吸收体。我们讨论了凸形对微波吸收器反射性能的影响，并表明凸形结构通过吸收大部分入射波的电磁能而具有显着的性能。我们使用了基于凹定理的设计方法来获得凸形的函数。吸收结构已通过使用周期矩方法（PMM）进行了分析。采用了一种优化方法来查找凸函数的系数，从而提供比楔形吸收器更好的吸收性能。比较了楔形吸收器和凸形吸收器在2-12 GHz频段的反射性能。介绍了它们在2 GHz下对于不同入射角的反射性能。这项研究的重要意义在于，通过使用简单的数学方法展示了具有最佳反射特性的楔形以外的其他吸收体形状。

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