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Reconfigurable RF 대역통과 여파기 기술

Reconfigurable RF Bandpass filters Technology

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초록

Reconfigurable RF 대역통과 여파기는 중심주파수와 통과대역폭이 모두 가변되는 여파기로서 대역통과 여파기의중심주파수만이 가변되는 tunable RF 대역통과 여파기에서 더욱 발전된 여파기 형태이다. 최근 다중 모드/다중 대역통신 시스템에서 그 필요성이 크게 대두되고 있는 반면, 연구는 시작단계에 있는 상황이어서 아직 설계기술이 완전히정립되지 못한 단계에 있다. 따라서 전체적인 발전 방향을 알아보기 위해서는 먼저 reconfigurable RF 대역통과 여파기의 요소 기술이 되는 tunable RF 대역통과 여파기 설계기술에 대해 검토하는 것이 필요하다고 판단된다. 중심주파수를 가변시키는 여파기와 통과대역폭만이 가변되는 두 종류의 tunable RF 대역통과 여파기들의 설계방법과 그 연구결과들을 비교한다. 마지막으로 현재까지 발표된 중심주파수와 통과대역폭이 모두 가변되는 reconfigurable 대역통과여파기의 구조들을 소개함으로서 다중 대역/다중 모드 통신 시스템을 위한 RF 대역통과 여파기 설계 연구의 진화방향을 살펴본다.

Abstract

Reconfigurable RF bandpass filters have both bandwidth and center frequency tuning capabilities, and are the improved filter of tunable filters with the center frequency tunability. Recently, multi-mode/multi-band communication systems require the reconfigurable filters. However, there have been very little design methods of the reconfigurable filter because the researches of the reconfigurable filter are just beginning stages. Therefore, the study on tunable filters is firstly required as element techniques of the reconfigurable filters. Moreover, tunable filters with the center frequency capability are compared with the bandpass filters with the bandwidth capability. Finally, the reported reconfigurable filters with both center frequency and bandwidth tuning capabilities are introduced, and directions of the researches of RF bandpass filter are proposed.

참고문헌 (35)

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