基于复合手性超材料的超宽带类二极管非对称传输和高效交叉极化转换

IF 6.7 1区计算机科学 Q1 Physics and Astronomy

Progress in Electromagnetics Research-Pier Pub Date : 2017-01-01 DOI:10.2528/PIER17091303

Yongzhi Cheng, Jingcheng Zhao, X. Mao, R. Gong

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引用次数: 28

摘要

本文提出了一种三层复合手性超材料(CCMM)，通过90◦偏振旋转在微波区超宽带范围内实现了类二极管的不对称传输和高效交叉极化转换，并通过仿真和实验进行了验证。该CCMM由夹在两个扭曲的亚波长金属光栅结构之间的盘状裂环结构组成。仿真结果与实验结果基本吻合。仿真结果表明，入射y(x)极化波沿−z(+z)方向通过CCMM板传播后仍然是高纯度的线极化波，但极化方向旋转了±90◦，在4.36 ~ 14.91 GHz频率范围内，极化转化率(PCR)大于90%。此外，在上述频率范围内，x偏振波沿−z轴方向传播的不对称透射系数(Δlin)和总透射率(Tx)均大于0.8。最后，通过CCMM单胞结构的电场分布特性进一步验证了上述实验和仿真结果。我们的设计将为CCMM偏振操纵的实际应用提供重要的参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

ULTRABROADBAND DIODE-LIKE ASYMMETRIC TRANSMISSION AND HIGH-EFFICIENCY CROSS-POLARIZATION CONVERSION BASED ON COMPOSITE CHIRAL METAMATERIAL

In this paper, a three layer composite chiral metamaterial (CCMM) is proposed to achieve diode-like asymmetric transmission and high-efficiency cross-polarization conversion by 90◦ polarization rotation with ultrabroadband range in microwave region, which was verified by simulation and experiment. This CCMM is composed of a disk-split-ring (DSR) structure sandwiched between two twisted sub-wavelength metal grating structures. The simulation agrees well with experiment in principle. The simulation results indicate that the incident y(x)-polarized wave propagation along the −z(+z) direction through the CCMM slab is still linearly polarized wave with high purity, but the polarization direction is rotated by ±90◦, and the polarization conversion ratio (PCR) is greater than 90% in the frequency range of 4.36–14.91 GHz. In addition, in the above frequency range, the asymmetric transmission coefficient (Δlin) and the total transmittance (Tx) for x-polarized wave propagation along the −z axis direction are both over 0.8. Finally, the above experiment and simulation results were further verified by the electric field distribution characteristics of the CCMM unit-cell structure. Our design will provide an important reference for the practical applications of the CCMM for polarization manipulation.

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来源期刊

Progress in Electromagnetics Research-Pier 物理-电信学

CiteScore

7.20

自引率

3.00%

发文量

审稿时长

1.3 months

期刊介绍： Progress In Electromagnetics Research (PIER) publishes peer-reviewed original and comprehensive articles on all aspects of electromagnetic theory and applications. This is an open access, on-line journal PIER (E-ISSN 1559-8985). It has been first published as a monograph series on Electromagnetic Waves (ISSN 1070-4698) in 1989. It is freely available to all readers via the Internet.