Design of the Circularly Polarized Ring Microstrip Antenna with Shorting Pins

Jun GOTO  Akimichi HIROTA  Kyosuke MOCHIZUKI  Satoshi YAMAGUCHI  Kazunari KIHIRA  Toru TAKAHASHI  Hideo SUMIYOSHI  Masataka OTSUKA  Naofumi YONEDA  Jiro HIROKAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E105-B    No.1    pp.34-43
Publication Date: 2022/01/01
Publicized: 2021/08/05
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2020EBP3167
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
array antenna,  dual band,  ring microstrip antenna,  shorting pin,  

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Summary: 
We present a novel circularly polarized ring microstrip antenna and its design. The shorting pins discretely disposed on the inner edge of the ring microstrip antenna are introduced as a new degree of freedom for improving the resonance frequency control. The number and diameter of the shorting pins control the resonance frequency; the resonance frequency can be almost constant with respect to the inner/outer diameter ratio, which expands the use of the ring microstrip antenna. The dual-band antenna where the proposed antenna includes another ring microstrip antenna is designed and measured, and simulated results agree well with the measured one.