Ultra-wideband polarization conversion metasurface based on topology optimal design and geometry tailor

2015 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) Pub Date : 2015-07-01 DOI:10.1109/IMWS-AMP.2015.7324906

S. Sui, J. Yu, Hua Ma, Jie-qiu Zhang, Jiafu Wang, Zhuo Xu, S. Qu

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引用次数: 3

Abstract

We presented a topology optimization method based on Genetic Algorithm (GA) combined geometry tailor scheme (GTS) to realize ultra-wideband polarization conversion metasurfaces (UPCM) in microwave range. The present method takes the connectivity condition of the elements into consideration, thereby resulting in good optimization efficiency. As examples, an UPCM is designed by topology optimization, which is composed of the dielectric substrate sandwiched with patched metallic patterns and continuous metal background. Three plasmon resonances are generated by electric and magnetic resonances, which lead to bandwidth expansion of cross-polarization reflection. The simulated results show that the maximum conversion efficiency is nearly 100% at the three plasmon resonance frequencies and the 3dB bandwidth range from 5.66 to 24.68GHz can be achieved for both normally incident x- and y-polarized waves.

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基于拓扑优化设计和几何定制的超宽带偏振转换超表面

提出了一种基于遗传算法(GA)结合几何定制方案(GTS)的拓扑优化方法，用于实现微波波段超宽带极化转换超表面(UPCM)。该方法考虑了各单元的连通性，优化效率较高。作为实例，采用拓扑优化的方法设计了一种由贴片金属图案和连续金属背景夹在介质衬底上的UPCM。电共振和磁共振产生三个等离子体共振，导致交叉极化反射的带宽扩大。仿真结果表明，在三个等离子体共振频率下，转换效率接近100%，正常入射的x极化波和y极化波均可达到5.66 ~ 24.68GHz的3dB带宽范围。

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来源期刊

2015 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)

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