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Title:
ELECTROMAGNETIC WAVE ABSORBING BOARD
Document Type and Number:
Japanese Patent JP2006186725
Kind Code:
A
Abstract:

To provide a transparent electromagnetic wave absorbing board with respect to electromagnetic wave within the frequency range of 1 to 10 GHz, which can be used for a partition for a room or road, etc., or for the window of a building, etc., and is used in a portable telephone, a radio LAN or an ETC, etc.

The electromagnetic wave absorbing board includes a transparent and planar dielectric body whose thickness is determined to allow an electromagnetic wave absorbing amount, which is obtained by using impedance Zxi at an incident side when electromagnetic wave is made incident from the surface of the dielectric body, to be not less than 10 dB.


Inventors:
KATANO MASAAKI
Application Number:
JP2004378869A
Publication Date:
July 13, 2006
Filing Date:
December 28, 2004
Export Citation:
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Assignee:
CENTRAL GLASS CO LTD
International Classes:
H01Q17/00; E04B1/92; H05K9/00
Domestic Patent References:
JP2003060383A2003-02-28
JP3318490B22002-08-26
JPH1013083A1998-01-16
JPS61269892A1986-11-29
JP2003115694A2003-04-18
JP2002314285A2002-10-25
JP2004179354A2004-06-24
JPH09255408A1997-09-30
JP2002121842A2002-04-26
JP2003289220A2003-10-10
JP2003133784A2003-05-09
JP2002185180A2002-06-28
JP3437993B22003-08-18
Other References:
橋本修, 電波吸収体の技術と応用, vol. 普及版 第1刷, JPN6008062921, 25 October 2004 (2004-10-25), JP, pages 17 - 25, ISSN: 0001201326
内藤喜之, 新OHM文庫 電波吸収体, vol. 第1版第1刷, JPN6008062923, 25 April 1987 (1987-04-25), JP, pages 42 - 51, ISSN: 0001201327
Attorney, Agent or Firm:
Yoshiaki Hanada