The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Compact Quadruple Inverted-F Antenna(QIFA) with Circular Polarization for GPS Receiver

원형 편파를 가지는 GPS 수신용 소형 4중 Inverted-F 안테나 연구

  • 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))
  • 손왕익 (한국과학기술원 전기 및 전자공학과) ;
  • 임원규 (한국과학기술원 전기 및 전자공학과) ;
  • 정원석 (한국과학기술원 전기 및 전자공학과) ;
  • 유종원 (한국과학기술원 전기 및 전자공학과)
  • Published : 2008.12.31
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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.

본 논문에서는 원형 편파를 가지는 GPS 수신용 소형 4중 Inverted-F 안테나(QIFA)를 제안한다. 소형화된 4-포트 안테나의 효율이 감소하는 문제를 해결하기 위하여 포트에서의 반사 계수와 포트 간의 상호 결합을 함께 고려하는 새로운 정합 방법을 이론적 해석을 통해 제안하고, 모의 실험을 통해 입증한다. 제안하는 QIFA는 $120^{\circ}$ 이상의 3-dB 빔 폭을 가지며, 15 dB 이상의 전후전계비 특성을 보인다. 또한, 제안하는 QIFA는 $10{\times}10{\times}12\;mm^3$에서 -2.5 dBic의 최대 이득과 0.5 dB 이하의 축비를 가진다.

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References

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