압전 세라믹 필터의 압전 특성에 의한 대역폭 의존성에 관한 연구

The Frequence Band on the Pizoelectric Characteristic of the Piezoelectric Ceramic Filter

  • 이수호 (경북대학교 전자전기컴퓨터공학부) ;
  • 석정영 (경북대학교 전자전기컴퓨터공학부) ;
  • 하숙정 (경북대학교 전자전기컴퓨터공학부) ;
  • 류기홍 (경북대학교 전자전기컴퓨터공학부) ;
  • 김한근 (경남정보대학 제어계측과) ;
  • 류주현 (세명대학교 전기공학과)
  • 발행 : 2002.07.08

초록

The ceramic filters were developed using technology similar to that of quartz crystal and electromechanical filter. However, the key to this development involved the theoretical analysis of vibration modes and material improvements of piezoelectric ceramics. The primary application of ceramic filters has been for consumer-market use. Accordingly, a major emhpasis has involved mass production technology, leading to low-priced devices. A typical ceramic filter includes monolithic resonators and capacitors packaged in unique configurations. Nakazawa developed a double-mode resonator as two acoustically coupled single resonators. And he developed 10.7MHz crystal filters using multi-energy trapping mode of thickness shear vibration. He succeeded in realizing a two-pole band pass filter response without external inductance by splitting a dot electrode to creat coupled symmetric and antisymmetric vibration modes. Accordingly, the simulation for ceramic filter were important. So that, this paper were investigated the pass frequency of filter on the electrode length and thickness of ceramic.

키워드