Title:
WOODY ELECTRIC WAVE ABSORBER
Document Type and Number:
WIPO Patent Application WO/2005/069712
Kind Code:
A1
Abstract:
A woody electric wave absorber, characterized in that it is a laminate type magnetic wood prepared by pressure-pasting an opposed plate material pair comprising natural wood or a processed woody material via a magnetic layer containing a ferrite powder, it contains a non-magnetic stainless steel powder in an amount of 20 to 80 vol % relative to the ferrite powder, the magnetic layer has a total volume content for the ferrite powder and the non-magnetic stainless steel powder of 10 to 40 % and has a thickness of 0.5 to 5.0 mm, it has a central frequency within 1 to 8 GHz, and has an electric wave absorption characteristic of 10 dB or more in a 2.45 GHz band or a 5.2 GHz band of frequency.
Inventors:
OKA HIDEO (JP)
Application Number:
PCT/JP2004/018998
Publication Date:
July 28, 2005
Filing Date:
December 20, 2004
Export Citation:
Assignee:
JAPAN SCIENCE & TECH AGENCY (JP)
OKA HIDEO (JP)
OKA HIDEO (JP)
International Classes:
H01F1/00; H01F1/37; H01Q17/00; (IPC1-7): H05K9/00; H01Q17/00; H01F1/00; H01F1/37
Foreign References:
| JPS50155999A | 1975-12-16 | |||
| JPH05299872A | 1993-11-12 | |||
| JP2002084090A | 2002-03-22 | |||
| JPH0818272A | 1996-01-19 | |||
| JP2000228598A | 2000-08-15 | |||
| JP2001118711A | 2001-04-27 | |||
| JPS61269399A | 1986-11-28 | |||
| JPH0320498U | 1991-02-28 | |||
| JPS63155699U | 1988-10-12 |
Other References:
NARITA K. ET AL: "Jisei Mokuzai o Mochiita GHz-tai Yo Denpa Kyushutai no Sakusei ni Kansuru Jikkenteki Kento", DENKI GAKKAI DENJI KANKYO KENKYUKAI SHIRO, 18 January 2000 (2000-01-18), pages 121 - 127, XP002991270
NARITA K. ET AL: "Sandwitch-gata Jisei Mokuzai no Sakuseiho to Denpa Kyushutai eno Oyo", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS GIJUTSU KENKYU HOKOKU, vol. 99, no. 18, 22 April 1999 (1999-04-22), pages 35 - 41, XP002991271
NARITA K. ET AL: "Sandwitch-gata Jisei Mokuzai no Sakuseiho to Denpa Kyushutai eno Oyo", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS GIJUTSU KENKYU HOKOKU, vol. 99, no. 18, 22 April 1999 (1999-04-22), pages 35 - 41, XP002991271
Attorney, Agent or Firm:
Nishi, Yoshiyuki (Suite 211 26-32, Nakahara 4-chome, Isogo-k, Yokohama-shi Kanagawa 36, JP)
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