Patent ID: 6278342
Filing Date: 2001-08-21
Classification: H03H

Abstract:
A filter structure having a first signal line, a second signal line, a third signal line, and a fourth signal line, characterized in that the structure comprisesa first bulk acoustic wave resonator having substantially a first area,a second bulk acoustic wave resonator having substantially a first area,a third bulk acoustic wave resonator having substantially a second area, anda fourth bulk acoustic wave resonator having substantially a second area, and in thatsaid first bulk acoustic wave resonator is connected between the first signal line and the third signal line,said second bulk acoustic wave resonator is connected between the second signal line and the fourth signal line,said third bulk acoustic wave resonator is connected between the first signal line and the fourth signal line, andsaid fourth bulk acoustic wave resonator is connected between the second signal line and the third signal line, and in thatsaid first area is substantially different from said second area.