| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to widen an adjustment range of a distance between resonators in a laminated dielectrics filter in which a pair of 1/4 wavelength strip line type resonance electrodes are installed, and to suppress the influence of harmonic waves in a 2f<SB>0</SB>to 3f<SB>0</SB>frequency region against a central frequency f<SB>0</SB>in the pass band. SOLUTION: A 1st resonator is composed of a resonating electrode 1 consisted of a tip short-circuited strip line, an electrode 2 for capacitance creation prepared above the resonance electrode 1, and a via-hole conductor 3 which connects these. A 2nd resonator is composed of a resonating electrode 4, an electrode 5 for capacity creation prepared under the resonance electrode 4, and a via-hole conductor 6. Respective electrodes which constitute the 1st resonator and the 2nd resonator are respectively created in different lamination layer planes. The resonance electrode 1 and the electrode for capacity creation 2 are created so that they do not overlap with the resonance electrode 4 and the electrode for charging capacity 5, and an electrode 7 for connection is prepared between the resonance electrode 1 and the electrode for charging capacity 2, and between the resonance electrode 4 and the electrode for charging capacity 5. COPYRIGHT: (C)2006,JPO&NCIPI
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