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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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A Reconfigurable Circularly Polarized Microstrip Antenna on a Cross-Shape Slotted Ground

십자형 접지면 슬롯을 이용한 재구성 가능한 원형 편파 마이크로스트립 안테나

  • Yoon, Won-Sang (Communication R&D Center, Samsung Thales) ;
  • Han, Sang-Min (Department of Information and Communication Engineering, Soonchunhyang University) ;
  • Lee, Dong-Hyo (Department of Radio Communication Engineering, Korea University) ;
  • Lee, Kyoung-Joo (Department of Radio Communication Engineering, Korea University) ;
  • Pyo, Seong-Min (Department of Radio Communication Engineering, Korea University) ;
  • Kim, Young-Sik (Department of Radio Communication Engineering, Korea University)
  • 윤원상 (삼성탈레스 통신연구소) ;
  • 한상민 (순천향대학교 정보통신공학과) ;
  • 이동효 (고려대학교 전파공학과) ;
  • 이경주 (고려대학교 전파공학과) ;
  • 표성민 (고려대학교 전파공학과) ;
  • 김영식 (고려대학교 전파공학과)
  • Published : 2010.01.31
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Abstract

A compact circular microstrip patch antenna with a switchable circular polarization(CP) is proposed at 2.4 GHz. An unequal cross-shaped slot on a ground plane is utilized as a perturbation. By switching pin diodes mounted on the slot, the CP sense of each antenna can be simply switched from left-handed(LH) CP to right-handed(RH) CP vice versa. Since the perturbation can be made on the ground plane and no bias circuit is required on the patch side, the bias circuit has not effect on the main beam radiation. From the experimental results, the impedance bandwidth and CP bandwidth of the proposed antenna have shown up to 150 MHz and 35 MHz, respectively. The peak gain of the proposed antenna is 1.7 dBi for both CP senses.

본 논문에서는 비대칭 십자형 접지면 슬롯 구조를 갖는 원형 편파 마이크로스트립 안테나와 접지면 슬롯 구조를 재구성하여 편파 특성을 변환시키는 방안을 제안하였다. 접지면의 슬롯 구조에 의해 방사 소자의 전류 흐름이 교란되어 원형 편파가 발생되며, PIN 다이오드의 on/off 동작 상태를 조정하여 비대칭 십자형 슬롯의 구조를 대칭적으로 변환시켜 원형 편파 특성을 재구성할 수 있다. 제안된 안테나는 원형 편파 형성을 위한 perturbation이 접지면에 위치하므로, PIN 다이오드 상태 조정을 위한 바이어스 회로 또한 접지면에 위치하게 되어 구현의 복잡도가 낮아지며, 이로 인해 방사 패턴의 왜곡을 감소시킬 수 있다. 제안된 안테나는 2.4 GHz 대역의 동작 주파수에서 임피던스 대역폭 150 MHz, 축비 대역폭 35 MHz, 최대 안테나 이득 1.7 dBi의 특성을 나타내었다.

Keywords

References

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