宽带高增益环形圆极化微带天线

doi:10.19665/j.issn1001-2400.2019.06.007

Abstract

Abstract:

Two novel single-fed ring circularly polarized microstrip antenna with an enhancing bandwidth are designed to broaden the axial ratio bandwidth of the cut ring patch antenna. Since the lateral slot perturbs the surface current of the ring patch, two equal-amplitude radiation modes with a phase difference of 90° are excited to radiate circular polarization. The measured results show that good circularly polarized characteristics of the annular-ring and the square-ring antennas have been obtained respectively from 3.74 to 3.98 GHz and from 3.80 to 4.04 GHz. The axial ratios (ARs) are less than 3 dB and the voltage standing wave ratios (VSWR) are less than 2. In addition, the antenna peak gains are higher than 10.0 dB for annular-ring and square-ring microstrip antennas over the operating bandwidth.

Key words: single-fed, wideband, high-gain, circularly polarization, microstrip antenna

CLC Number:

TN823+.15

CHEN Qingqing,LI Jianying,DING Yuxin,ZHANG Lingkai,FENG Yao,XIE Jing. Wideband high-gain ring circularly polarized microstrip antenna[J].Journal of Xidian University, 2019, 46(6): 46-51.

Figures/Tables 14

References 16

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Wideband high-gain ring circularly polarized microstrip antenna

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