A Wideband Printed Elliptical Monopole Antenna for Circular Polarization

Takafumi FUJIMOTO  Takaya ISHIKUBO  Masaya TAKAMURA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E100-B   No.2   pp.203-210
Publication Date: 2017/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2016WSP0002
Type of Manuscript: Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Realization of Next Generation Wireless Systems)
Category: 
Keyword: 
wideband antenna,  printed monopole antenna,  circular polarization,  elliptical patch,  

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Summary: 
In this paper, a printed elliptical monopole antenna for wideband circular polarization is proposed. The antenna's structure is asymmetric with regard to the microstrip line. The section of the ground plane that overlaps the elliptical patch is removed. With simulations, the relationship between the antenna's geometrical parameters and the antenna's axial ratio of circularly polarized wave is clarified. The operational principle for wideband circular polarization is explained by the simulated electric current distributions. The simulated and measured bandwidths of the 3dB-axial ratio with a 2-VSWR is approximately 88.4% (2.12GHz-5.47GHz) and 83.6% (2.20GHz-5.36GHz), respectively.