National Changhua University of Education Institutional Repository : Item 987654321/11022

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NCUEIR > College of Engineering > Department and Graduate Institute of Electronic Engineering > Proceedings > Item 987654321/11022

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/11022

Title:	Design of an annular-ring microstrip antenna for circular polarization
Authors:	Sim, Chow-Yen-Desmond;Lin, Kuang-Woei;Row, Jeen-Sheen
Contributors:	電機工程學系
Date:	2004-06
Issue Date:	2012-06-05T02:13:29Z
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Abstract:	The design of an annular-ring microstrip antennas for circular polarization (CP) was discussed. For obtaining the CP operation of the annular-strip microstrip antenna, two orthogonal modes with equal amplitude and 90� phase difference were excited simultaneously. In order to excite orthogonal modes, a L-shaped strip was placed between inside the annular ring and its two ends were connected to the orthogonal modes of the inner boundary of the annular ring patch. The resonant frequency of x-polarized mode was higher than that of y-polarized mode, and thus a right-handed CP operation was obtained. The axial ratio of the CP radiation was also measured in the broadside direction.
Relation:	IEEE Antennas and Propagation Society Symposium 2004 Digest held in Conjunction with: USNC/URSI National Radio Science Meeting, Monterey, CA, June 20-25, 2004, 1: 471-474
Appears in Collections:	[Department and Graduate Institute of Electronic Engineering] Proceedings

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