The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Dual-band Balanced Amplifier Using Meta-material Transmission Line

메타물질 전송선로를 이용한 이중대역 평형증폭기

  • 임종식 (순천향대 전기통신공학과) ;
  • 이재훈 (순천향대 전기통신공학과) ;
  • 이준 (순천향대 전기통신공학과) ;
  • 전역환 (순천향대 전기통신공학과) ;
  • 정용채 (전북대 전자정보공학부) ;
  • 한상민 (순천향대 정보통신공학과) ;
  • 안달 (순천향대 전기통신공학과)
  • Received : 2011.08.09
  • Accepted : 2011.11.17
  • Published : 2011.12.01
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Abstract

This paper describes a design of dual band balanced amplifier using a lefted handed meta-material transmission line structure for high frequency application. Meta-material transmission lines have been known to have dual band frequency responses. A dual band branch line hybrid coupler is designed using the meta-material transmission lines, and measured at first. Two identical dual band amplifiers are also designed, built and tested using the same meta-material transmission structure. The proposed dual band balanced amplifier is composed of those dual band branch line hybrid coupler and amplifiers. In order to suggest an design example, a prototype of dual band balanced amplifier is built and measured at the dual frequencies, 1800MHz($f_1$) and 2300MHz($f_2$). The simulation and measurement show that the fabricated balanced amplifier operates well at the desired dual frequencies bands with the gain of 11.12dB and 17.67dB at $f_1$ and $f_2$, respectively, with a good agreement with the simulation results.

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References

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