A Dual-Band Metasurface-Based Antenna with Shorting Pins

2021 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) Pub Date : 2021-11-15 DOI:10.1109/IMWS-AMP53428.2021.9643878

Wenzhang Zhang, Jiafeng Zhou, Yi Huang, Mobayode O. Akinsolu, Mingwei He, Bo Liu

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Abstract

A dual-band metasurface (MTS)-based antenna can be realized by composite right-/left-handed (CRLH) structures for wireless power transfer or ambient wireless energy harvesting. The bandwidth in the right-handed (RH) region can be obtained by exciting different desired transverse magnetic (TM) modes while that in the left-handed (LH) region can be achieved by mushroom radiating structures. The position choice of shorting pins in mushroom structures is significant since it will not only affect the potential bandwidth in the RH region, but also be related to the resonant frequencies in the LH region. The positions of the shorting pins will be chosen where the Electric field distribution is minimal for modes excited in the RH region. The proposed dual-band MTS-based antenna with an overall size of 0.375 $\lambda_{0}\times 0.375 \lambda_{0}\times 0.035\ \lambda_{0}$ can achieve 25% and 48% fractional bandwidths, and 5.0 and 9.6 dBi peak gains in the lower and higher frequency band, respectively.

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一种带短管脚的双频超表面天线

基于双波段超表面(MTS)的天线可以通过左右复合结构(CRLH)实现无线电力传输或环境无线能量收集。在右手区(RH)可以通过激发不同的期望横磁(TM)模式来获得带宽，而在左手区(LH)可以通过蘑菇辐射结构来获得带宽。在蘑菇结构中，短路引脚的位置选择是非常重要的，因为它不仅会影响RH区域的电位带宽，而且还与LH区域的谐振频率有关。短路引脚的位置将选择在电场分布最小的地方，在RH区域激发模式。所提出的双频mts天线总体尺寸为0.375 $\lambda_{0}\乘以0.375 $\lambda_{0}\乘以0.035\ \lambda_{0}$，可实现25%和48%的分数带宽，并在低频段和高频段分别获得5.0和9.6 dBi的峰值增益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2021 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)

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