National Changhua University of Education Institutional Repository : Item 987654321/10984

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NCUEIR > College of Engineering > Department and Graduate Institute of Electronic Engineering > Periodical Articles > Item 987654321/10984

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/10984

Title:	Dual-frequency circularly-polarized microstrip antenna with switchable polarization sense
Authors:	Wu, Jia-Feng;Row, Jeen-Sheen;Wong, Kin-Lu
Contributors:	電機工程學系
Keywords:	Microstrip antenna;Dual-frequency operation;Switchable polarization
Date:	2008-08
Issue Date:	2012-06-05T02:01:08Z
Publisher:	Wiley
Abstract:	A dual-frequency circularly-polarized (CP) microstrip antenna capable of switching polarization sense is presented. The antenna is fed by a microstrip line through aperture coupling. First, it is found that a CP mode can be excited when the radiating patch is square and an open-ring slot is used as the coupling aperture. Then, by truncating the radiating patch, another CP mode can be obtained. The two CP modes have reversed polarization senses, and their operating frequencies are different. For the proposed dual-frequency CP microstrip antenna, two prototypes with frequency ratios of 1.07 and 1.23 were constructed, and voltage-controlled diodes are employed to achieve the electrical switching between the two CP modes.
Relation:	Microwave and Optical Technology Letters, 50(8): 2125-2128
Appears in Collections:	[Department and Graduate Institute of Electronic Engineering] Periodical Articles

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