Open AccessCircularly Polarized Square Ring Slot Antenna with Arrow‐Shaped Structure
Author(s) -
Sung Youngje
Publication year - 2009
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.09.0109.0020
Subject(s) - square (algebra) , circular polarization , axial ratio , microstrip antenna , optics , slot antenna , turnstile antenna , radiation , antenna (radio) , polarization (electrochemistry) , physics , radiation pattern , patch antenna , microstrip , engineering , electrical engineering , geometry , mathematics , chemistry
A novel design of a compact square‐ring slot microstrip antenna for achieving circular polarization (CP) operation is proposed and experimentally studied. By using an arrow‐shaped slot structure as a radiating element, the resonant frequency of the proposed antenna is significantly lowered, which can lead to a large size reduction for fixed frequency operation. The CP radiation characteristics are achieved by loading with proper asymmetry, which can be placed diagonally. A prototype of the proposed design is implemented and its performance is measured. Measured results show that radiation patterns with good CP characteristics are obtained at the resonant frequency.