Study on the One-Strip Electrode Ceramic Filter Using the Energy Trapping Effect

에너지트랩 효과를 이용한 단일전극 세라믹 필터에 관한 연구

In order to simulate the ceramic filter in the state of the one-strip electrode, the theory has been analyzed and a computer program has been developed using the energy trapping effect. The ceramic filters were fabricated using the PZT-4 specimen. The necessary condition that the ceramic filter has the energy trapping effect is that the electroded portion frequency should be smaller than the unelectroded portion frequency when the wave number is zero. Each of the average differences of the resonant point and bandwidth between by the theoretical calculations and by experiment results was 5.6[%] and 3.72[%]. It is considered that the one-strip ceramic filter having a desired characteristics and the lowest difference can be fabricated easily by means of the simulation developed in this paper and the fabrication methods.