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An axial‐ratio beamwidth enhancement of patch antenna with digonal slot and square ring
Author(s) -
Yuan Bo,
Zhang Xiao Hong,
Hu Zhi Fang,
Luo Guo Qing
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29646
Subject(s) - beamwidth , fan beam antenna , coaxial antenna , axial ratio , antenna measurement , optics , antenna factor , patch antenna , radiation pattern , physics , antenna (radio) , microstrip antenna , acoustics , electrical engineering , engineering
A novel circularly polarized (CP) antenna with wide angular coverage is presented. The proposed antenna is formed by a 45 ° slot cut in the center of a rectangular patch antenna and a square ring around it. It can achieve an impedance bandwidth of 110 MHz and a 3 dB axial ratio bandwidth of 25 MHz. For this design, very stable and symmetrical radiation patterns are obtained. The 3 dB axial ratio beamwidth for the antenna is 160 ° , compared with the antenna that without the metal square ring, the antenna with square ring has 19 ° more 3 dB axial ratio beamwidth. This antenna has been successfully applied on passive keyless entry system on door lock. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:672–675, 2016
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