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Patent Searching and Data


Title:
FILTER
Document Type and Number:
Japanese Patent JPS59200516
Kind Code:
A
Abstract:

PURPOSE: To obtain a small-sized filter whose package position is less restricted by forming a coil pattern on a dielectric substrate and then arraying a ferrite plate thereupon oppositely through an insulating film inbetween.

CONSTITUTION: The coil pattern is formed on the dielectric substrate 4. The ferrite plate 11 is arranged as opposed to the substrate 4 through the insulating sheet 3 in-between. This ferrite plate 11 is formed almost in the same shape with the coil pattern and provided on the coil pattern. Consequently, the ferrite plate converges the leaked magnetic flux to reduce the size of the coil pattern, and the package position is less restricted by magnetic shield effect. Thus, the small- sized filter whose package place is less restricted is obtained.


Inventors:
Kawaguchi, Chihiro
Onizuka, Akira
Application Number:
JP1983000074387
Publication Date:
November 13, 1984
Filing Date:
April 26, 1983
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H03H7/075; H03H1/00; (IPC1-7): H03H7/01