Title:
LAMINATION TYPE ELECTRIC WAVE ABSORBER
Document Type and Number:
Japanese Patent JP2663409
Kind Code:
B2
Abstract:
PURPOSE: To provide a thin lamination type electric wave absorber which has excellent electric wave attenuating characteristics by laminating magnetic compound material, which is formed by mixing magnetic powder with rubber or resin, and a ferrite sintered body.
CONSTITUTION: A lamination type electric wave absorber is composed of a metal board 1, a magnetic compound layer 2, which is formed of magnetic compound material, and a nickel-zinc ferrite sintered layer 3. The magnetic compound layer 2 is formed by mixing carbonyl iron powder with rubber by 80-90wt.% allowing 5-20 dielectric constant and 10-20 relative magnetic permeability and has not only the characteristics of a magnetic body but also the characteristics of a dielectric material. Since the magnetic compound layer 2 is provided with the both characteristics, the layer 2 is allowed to have a large electric wave attenuating quantity. Therefore, the lamination type electric wave absorber is allowed to be thin while maintaining the electric wave attenuating characteristics in a wide band and the electric wave absorber which allows easy carriage and excellent machinability is provided.
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Inventors:
TERANISHI MANABU
INAGAKI MASAYUKI
ISHIKURA MAKOTO
INAGAKI MASAYUKI
ISHIKURA MAKOTO
Application Number:
JP13719092A
Publication Date:
October 15, 1997
Filing Date:
May 28, 1992
Export Citation:
Assignee:
FUJI DENKI KAGAKU KK
International Classes:
H05K9/00; B32B7/02; H01Q17/00; (IPC1-7): H05K9/00; B32B7/02; H01Q17/00
Domestic Patent References:
| JP6289747A | ||||
| JP6197998A | ||||
| JP60146398U | ||||
| JP295293U | ||||
| JP556320B2 | ||||
| JP6341758Y2 |
Attorney, Agent or Firm:
Kensuke Isshiki (2 outside)