Release time:2019-08-05

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Affiliation of Author(s):UESTC

Teaching and Research Group:CRFICS

Journal:Microwave and Optical Technology Letters

Note:National Natural Science Foundation of China, Grant/Award Number: 61371047 and 61601093; Fundamental Research Funds for the Central Universities, Grant/Award Number: ZYGX2016Z011; Science and Technology Planning Project of Guangdong Province of China, Grant/Award Number: 2016A010101036; The Science and Technology Planning Project of Sichuan Province of China, Grant/Award Number: 2016GZ0116 and 2016GZ0061

Indexed by:Applied Research

Volume:59

Issue:12

Page Number:3055-3063

Translation or Not:no

Date of Publication:2017-09-22

This article presents the design of a compact circularly polarized square slot antenna fed by a G‐shaped strip feedline. The 3 dB axial ratio (AR) band can be achieved by modifying the feedline by simply extending it with an L‐shaped monopole and an inverted C‐shaped monopole. In simple terms, the extended part resembles a G‐shaped patch when viewed from the top. To extend the AR bandwidth achieved by the G‐patch, perturbations in the form of a U‐strip and an L‐shaped slot were introduced in the wide slot and ground plane, respectively. Measured results showed a wide 3 dB axial ratio bandwidth