Gain enhancement of transmitting antenna incorporated with double-cross-shaped electromagnetic metamaterial for wireless power transmission

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• 作者：Bo Ma^a ; ^b ; Xiao-ming Yang^a ; ^{0120030022@mail.xhu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Tian-qian Li^a ; Xiao-feng Du^a ; Ming-yang Yong^a ; Hong-yuan Chen^c ; Hang He^d ; Yuan-wen Chen^d ; Ao Lin^e ; Jiao Chen^f ; Lin Zhou^g
• 关键词：Double-cross-shaped metamaterial ; Gain ; Microstrip patch antenna ; Superstrate ; Wireless power transmission
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：127
• 期：16
• 页码：6754-6762
• 全文大小：1964 K

文摘

This paper proposes a novel approach to enhance the aperture efficiency of the transmitting microstrip patch antenna (MPA) by designing a new inclusion of double-cross-shaped metamaterial (DCSM) superstrate applied in microwave wireless power transmission(WPT). Overall WPT model and transmitting antenna selection are briefly introduced and numerical simulation is conducted in HFSS. Homogenization retrieval method based on transmission and reflection coefficients is utilized to calculate the effective parameters of the DCSM unit cell, electric field and surface current distribution are displayed to qualitatively explain the occurrence of negative permittivity and permeability. The Matlab2008a script is also presented to calculate the geometry dimensions of the corresponding conventional patch antenna operating at desired resonant frequency. Simulation results indicate that the gain of the transmitting antenna increases from 7.46 dB to 12.35 dB after loading with the 6 × 3 × 1 array DCSM MTM as the superstrate, the measured gain increases from 7.1 dB to 12.21 dB thus an enhancement of 184% for the transmitting antenna's aperture efficiency is obtained which is of significant value for the whole WPT system. For the last section of our paper, electric field of the transmitting MPA before and after loading with DCSM superstrate are illustrated to gain insight physical mechanism of the gain enhancement.