| 摘要 |
PROBLEM TO BE SOLVED: To reduce the fluctuation of an attenuation pole in filter characteristics caused by layer displacement occurring in a process of stacking a plurality of dielectric layers. SOLUTION: In first to third dielectric layers 21 to 23, first and third resonators 11, 13 are arranged in parallel both sides of an interposed second dielectric layer 22 so as to be partially overlapped with each other in a plane view. Second and fourth resonators 12, 14 are arranged in parallel on both sides of the interposed second dielectric layer 22 so as to be partially overlapped with each other in a plane view. The first and second resonators 11, 12 and the third and fourth resonators 13, 14 are plane-symmetrically arranged relative to a plane orthogonally crossing the main surface of each dielectric layer in parallel with the length direction of the first to fourth resonators 11 to 14. First to fourth input/output terminals 61a, 61b, 62a, 62b are connected to the first to fourth resonators, wherein the first and second input/output terminals 61a, 61b are connected and the third and fourth input/output terminals 62a, 62b are connected. COPYRIGHT: (C)2005,JPO&NCIPI
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