Premium
Broadband circularly polarized printed monopole antenna with unidirectional radiation patterns
Author(s) -
Sze JiaYi,
Zhou ZhiHong,
Hsu ChungI G.,
Lin ChengHong
Publication year - 2014
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.28376
Subject(s) - broadband , radiation pattern , coplanar waveguide , radiation , microwave , optics , monopole antenna , physics , patch antenna , bandwidth (computing) , circular polarization , antenna (radio) , dipole antenna , optoelectronics , microstrip , electrical engineering , engineering , telecommunications
This article proposes a new broadband circularly polarized (CP) printed monopole antenna (PMA) with unidirectional radiation patterns. The simple structure consists of only a circular patch, a tuning rectangular patch, and an inverted‐L strip protruded from the signal line of a feeding asymmetric coplanar waveguide (CPW). Through simple design procedures, a CP PMA with bidirectional radiation patterns and with a fractional CP bandwidth (CPBW) of larger than 35% can be obtained. By placing an open metal cavity underneath the bidirectional PMA without changing the PMA's structural dimensions, one can obtain unidirectional radiation patterns without downgrading the CPBW. In addition, the peak antenna gain can be raised by about 6 dB. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1535–1540, 2014