Title:
ノイズフィルタ
Document Type and Number:
Japanese Patent JP4370838
Kind Code:
B2
Abstract:
Four magnetic layers consisting of upper and lower magnetic layers and intermediate magnetic layers are laminated to form a laminated unit. Two signal lines are disposed side by side between the intermediate magnetic layers, and two ground electrodes sandwich the intermediate magnetic layers therebetween so as to form a transmission line. A dielectric member is disposed between the two signal lines. With this configuration, a common-mode signal is attenuated by utilizing magnetic loss in the magnetic layers. In contrast, by providing the dielectric member, a normal-mode signal is allowed to propagate by reducing the effective relative magnetic permeability while preventing the occurrence of blunt waves.
Inventors:
Toru Harada
Application Number:
JP2003201298A
Publication Date:
November 25, 2009
Filing Date:
July 24, 2003
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H03H7/01; H03H7/06; H01P1/203; H03H1/00; H03H7/075; H03H7/09
Domestic Patent References:
| JP2002084157A | ||||
| JP2000058343A | ||||
| JP10041136A | ||||
| JP2000235919A | ||||
| JP4056307U |
Attorney, Agent or Firm:
Kazuhiko Hirose