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


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.


Microstrip Patch Antennas;Circular Polarization;Reconfigurable Antennas;Cross-shape Slots;Pin Diodes


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