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Title:
RADIO WAVE ABSORBER MATERIAL AND RADIO WAVE ABSORBER
Document Type and Number:
Japanese Patent JP2006134907
Kind Code:
A
Abstract:

To provide a radio wave absorber material which can deal with various GHz band frequencies only by changing the thickness of a sheet without changing a magnetic powder to be used, and to provide a radio wave absorber in which its material is processed.

The radio wave absorber material contains a conductive magnetic powder in which a volume specific resistance value is below 1×10-4 Ωcm and a saturation magnetic flux density σs is 10 emu/g or more. The conductive magnetic powder can use a ferrite powder having a non-magnetic conductive layer, such as, for example, a metal Cu, etc. on the front surface. This radio wave absorber material is processed to a sheet-like radio wave absorber of various thickness by rolling, etc., and used.


Inventors:
IDEI MIKIO
SUENAGA SHINICHI
SHIGEMATSU ISAO
TSUBOI ZEN
HASHIMOTO NAOYUKI
Application Number:
JP2004318788A
Publication Date:
May 25, 2006
Filing Date:
November 02, 2004
Export Citation:
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Assignee:
DOWA MINING CO
NIPPON BENGARA KOGYO KK
International Classes:
H05K9/00; H01F1/00; H01Q17/00
Domestic Patent References:
JPH07183110A1995-07-21
JPS6312198A1988-01-19
JPH11354972A1999-12-24
JPH05140368A1993-06-08
JPH0262007A1990-03-01
JPH06310896A1994-11-04
Attorney, Agent or Firm:
Komatsu Taka
Kenji Wada