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50. (WO2008143071) STACKED BANDPASS FILTER

Pub. No.:    WO/2008/143071    International Application No.:    PCT/JP2008/058800
Publication Date: Fri Nov 28 00:59:59 CET 2008 International Filing Date: Thu May 15 01:59:59 CEST 2008
IPC: H03H 7/09
H01P 1/203
H01P 1/205
H01P 7/08
Applicants: Murata Manufacturing Co., Ltd.
株式会社村田製作所
TANIGUCHI, Tetsuo
谷口哲夫
Inventors: TANIGUCHI, Tetsuo
谷口哲夫
Title: STACKED BANDPASS FILTER
Abstract:
Capacitors are formed between a ground electrode (109) of a ground electrode forming layer (103) and capacitor electrodes (111), (112), (113) and (114) of capacitor electrode forming layers (102) and (104), respectively, and a plurality of inductor electrodes are structured by via electrodes (131)-(138) of and line electrodes (116)-(119), so that those loop surfaces are overlapped in part with each other from a view in a disposing direction of the inductor electrodes to structure a plurality of LC parallel resonators. Further, the directions of the loops formed with the inductor electrodes of neighboring LC parallel resonators are made reverse. In addition, shapes and distributions [dispositions] of the capacitor electrodes (111), (112), (113) and (114) are formed to be point symmetry from a plane view.