Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Fabrication of 800 MHz band duplexer using SAW filters

표면탄성파 필터를 이용한 MHz 대역용 듀플렉서 제작

  • 양형국 (전자부품종합기술연구소 부품연구 3팀) ;
  • 조현민 (전자부품종합기술연구소 부품연구 3팀) ;
  • 박종철 (전자부품종합기술연구소 부품연구 3팀)
  • Published : 1998.06.01
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Abstract

A hybrid-integrated SAW(surface acoustic wave) douplexer including transmitter(Tx) filter, receiver(Rx) filter an dantenna terminal has been studied. The prototype duplxer was designed for CDMA system application in the 800 MHz-band. Ladder type SAW filters consisting of one port SAW resonators wer integrated on epoxy substrate to demonstrate the feasiblity of antenna duplexer. In order to perform the duplexing function, a strip line for impedance transformaton with length of .gamma./4 was inserted at rx path. The fabricted duplexer has an insertion loss of 3.0 dB at Tx path and 3.7 dB at Rx path. The attenuation has more than 40dB.

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