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http://dx.doi.org/10.5515/KJKIEES.2008.19.12.1427

Compact Quadruple Inverted-F Antenna(QIFA) with Circular Polarization for GPS Receiver  

Son, Wang-Ik (Department of Electrical Engineering, Korea Advanced Institute of Science and Technology(KAIST))
Lim, Won-Gyu (Department of Electrical Engineering, Korea Advanced Institute of Science and Technology(KAIST))
Jeong, Won-Seok (Department of Electrical Engineering, Korea Advanced Institute of Science and Technology(KAIST))
Yu, Jong-Won (Department of Electrical Engineering, Korea Advanced Institute of Science and Technology(KAIST))
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.19, no.12, 2008 , pp. 1427-1434 More about this Journal
Abstract
Compact quadruple inverted-f antenna(QIFA) with circular polarization for GPS receiver is proposed. Radiation efficiency is decreased when 4-port antenna is smaller. A new matching method is proposed by considering both a return loss at one port and mutual coupling between ports to increase radiation efficiency. Experimental results show that the proposed QIFA has a 3-dB beamwidth of more than 120 degrees and a front-to-back ratio of more than 15 dB. Also, the QIFA has the peak gain of -2.5 dBic and the axial ratio under 0.5 dB.
Keywords
Inverted-F Antenna(IFA); 4-Port Antenna Matching; Circular Polarization; GPS Antenna; Quadruple Inverted-F Antenna(QIFA);
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