| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a surface acoustic wave filter device which has superior electric power resistance and can be made more compact. <P>SOLUTION: A transversely coupled resonator type surface acoustic wave filter device 1 is constituted by the facts that connecting one-end sides of N (N: an integer not less than 2) first transversely coupled resonator type SAW filters 6 and 7 are connected to an unbalanced signal terminal 3 in parallel, M (M: an integer not less than 1) second transversely coupled resonator type SAW filters 8 are cascaded to the first transversely coupled resonator type SAW filters 6 and 7, and a second transversely coupled resonator type SAW filter 8 is connected to first and second balanced signal terminals 4 and 5, where N>M. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
