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Patent Searching and Data


Title:
ELECTROMAGNETIC WAVE ABSORBING PLATE
Document Type and Number:
Japanese Patent JP2006135031
Kind Code:
A
Abstract:

To provide a transparent electromagnetic wave absorbing plate for the electromagnetic waves in the frequency range of 1-10 GHz used for portable telephones, wireless LANs, ETCs, etc.

The electromagnetic wave absorbing plate is composed of a transparent plate-like dielectric and a resistance coating film formed on one surface of the dielectric. By finding the electromagnetic wave absorbing amount of the electromagnetic wave absorbing plate by using the incident-side impedance when an electromagnetic wave enters into the dielectric from the surface on which the resistance coating film is not formed, the thickness of the dielectric and the areal resistance of the resistance coating film are decided so that the electromagnetic wave absorbing amount may become ≥10 dB.


Inventors:
KATANO MASAAKI
ONISHI MASAJI
OMOTO HIDEO
Application Number:
JP2004321119A
Publication Date:
May 25, 2006
Filing Date:
November 04, 2004
Export Citation:
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Assignee:
CENTRAL GLASS CO LTD
International Classes:
H05K9/00; B32B7/02; B32B17/04; B32B27/36; E04B1/92; H01Q17/00
Domestic Patent References:
JP2004281632A2004-10-07
JP2003152387A2003-05-23
JP2002111277A2002-04-12
JP2000059068A2000-02-25
Attorney, Agent or Firm:
Yoshiyuki Nishi