Title:
COMPOSITE FILTER DEVICE AND BANDPASS FILTER
Document Type and Number:
Japanese Patent JP2021100214
Kind Code:
A
Abstract:
To provide a composite filter device and a bandpass filter capable of suppressing the insertion loss in a passband of the filter while achieving desired inductance.SOLUTION: A composite filter device 12 includes a connecting part 102 connected to a common terminal T0, a first filter 14 arranged between the connecting part 102 and a first terminal T1, a second filter 18 arranged between the connecting part 102 and a second terminal T2, a first inductor L1 connected in series between the second filter 18 and the connecting part 102, including first wiring electrodes 114, 134 wound in a predetermined direction and formed in an inner layer of a multilayer substrate, and a second inductor L2 connected in series between the common terminal T0 and the connecting part 102, including a second wiring electrode 122 wound in a predetermined direction, and formed in an inner layer of the multilayer substrate. The first wiring electrodes 114, 134 and the second wiring electrode 122 are arranged so that they at least partially overlap when the multilayer substrate is viewed in a plan view.SELECTED DRAWING: Figure 1
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Inventors:
SATO TOMOYA
Application Number:
JP2019231795A
Publication Date:
July 01, 2021
Filing Date:
December 23, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO
International Classes:
H03H9/72; H01F17/00; H01F27/00; H03H7/46; H03H9/54; H03H9/64; H03H9/70
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Mutsumi Sato
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito
Mutsumi Sato