Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design of hybrid ring directional coupler using lambda/8 section

Lambda/8 선로를 이용한 하이브리드 방향성 결합기의 설계

  • Paek, Hyun (School of Electrical and Electronics Eng.Chung-Ang University) ;
  • Choi, Jin-Kyu (School of Electrical and Electronics Eng.Chung-Ang University) ;
  • Kim, Koon-Tae (School of Electrical and Electronics Eng.Chung-Ang University) ;
  • Choi, Hyuk-Jae (School of Electrical and Electronics Eng.Chung-Ang University) ;
  • Kwon, So-Hyun (School of Electrical and Electronics Eng.Chung-Ang University) ;
  • Kim, Hyeong-Seok (School of Electrical and Electronics Eng.Chung-Ang University)
  • 백현 (중앙대학교 전자전기공학부) ;
  • 최진규 (중앙대학교 전자전기공학부) ;
  • 김군태 (중앙대학교 전자전기공학부) ;
  • 최혁재 (중앙대학교 전자전기공학부) ;
  • ;
  • 김형석 (중앙대학교 전자전기공학부)
  • Published : 2009.07.14
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Abstract

RFID system had used same frequency for transmit and receive signal. RFID recognize range is restrict, because of receive and transmit signal coupled each other. That cause directional coupler is not ideal isolation characteristic and antenna missmatching. So we proposed lambda/8 section directional coupler and design high isolation to use RFID.

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