Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Design and Fabrication of Dielectric Duplexer and Bandpass Filters for K-PCS and W-CDMA Dualband

K-PCS와 W-CDMA 듀얼밴드용 유전체 듀플렉서와 밴드패스 필터의 설계 및 제작

  • Choi, U-Sung (Department of Electrical. Information and Communication Engineering, Wonkwang University) ;
  • Yang, Sung-Hyun (Department of Electronics, Kwangwoon University) ;
  • Kim, Cheol-Ju (Department of Chemistry, Chonbuk University) ;
  • Moon, Ok-Sik (R&D Team, Yooilcnt Co. Ltd.)
  • 최우성 (원광대학교 전기정보통신공학부) ;
  • 양성현 (광운대학교 전자공학과) ;
  • 김철주 (전북대학교 화학과) ;
  • 문옥식 ((주)유일씨엔티 개발팀)
  • Received : 2012.10.09
  • Accepted : 2012.11.07
  • Published : 2012.12.01
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Abstract

The K-PCS and W-CDMA dual band dielectric duplexer and bandpass filters have been designed and fabricated. The dual band duplexer consists of the separate monoblock K-PCS and W-CDMA duplexers using common antenna port. The coupling capacitance and I/O impedance matching have been designed to minimize the cross interference between the bands. Isolations of crosspoint between Tx and Rx in K-PCS and W-CDMA dualband were about 47 dB and 100 dB, respectively. On the other hand, isolations of Tx and Rx in K-PCS and W-CDMA were about 66 dB and 65 dB, respectively. The difference between 47 dB and 100 dB originated from the different center frequencies in Tx and Rx of K-PCS and W-CDMA bands. The coupling capacitance of the bandwidth, I/O capacitance of I/O matching and impedance matching, and various capacitances were important role to fabricate the dielectric duplexer and bandpass filters.

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