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Title:
EBG STRUCTURE, ANTENNA DEVICE, RFID TAG, NOISE FILTER, NOISE ABSORPTIVE SHEET AND WIRING BOARD WITH NOISE ABSORPTION FUNCTION
Document Type and Number:
WIPO Patent Application WO/2008/062562
Kind Code:
A1
Abstract:
A magnetic part is at least partially incorporated in an EBG (electromagnetic bandgap) structure. Preferably, the magnetic part is disposed in proximity to, if possible in contact with, at least portion of a conductor as a constituent of the EBG structure, for example, ground conductor, capacitance constructing conductor and/or conductor constructing via or other inductance. As the magnetic part, there can be mentioned, for example, a ferrite plated film, a composite magnetic layer composed a magnetic powder and a resin binder, etc.

Inventors:
KONISHI TAKAYOSHI (JP)
KONDO KOICHI (JP)
ARAI SATOSHI (JP)
YOSHIDA SHIGEYOSHI (JP)
Application Number:
PCT/JP2007/001287
Publication Date:
May 29, 2008
Filing Date:
November 22, 2007
Export Citation:
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Assignee:
NEC TOKIN CORP (JP)
KONISHI TAKAYOSHI (JP)
KONDO KOICHI (JP)
ARAI SATOSHI (JP)
YOSHIDA SHIGEYOSHI (JP)
International Classes:
G06K19/07; H01Q17/00; G06K19/077; H01F1/34; H01F1/37; H01P1/00; H01Q1/38; H01Q9/28; H01Q15/14; H03H7/075
Domestic Patent References:
WO2005024999A12005-03-17
WO2005076408A12005-08-18
WO2004034504A12004-04-22
Foreign References:
JP2005538629A2005-12-15
JP2004146800A2004-05-20
JPH11330770A1999-11-30
US6972727B12005-12-06
JP2004535722A2004-11-25
JP2002204123A2002-07-19
JP2003529259A2003-09-30
Other References:
BELL J.M.: "Ultra-wideband and low-profile hybrid EEB/ferrite ground plane for airborne foliage penetrating radar", ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM 2006, IEEE, 2006, pages 369 - 372, XP010944111
ZHAO XIAOYING: "Study on 2-D gyrotropic EBG by FEM", IEEE INTERNATIONAL SYMPOSIUM ON MICROWAVE, ANTENNA, PROPAGATION AND EMC TECHNOLOGIES FOR WIRELESS COMMUNICATIONS, 2005. MAPE 2005, vol. 1, 2005, pages 827 - 830, XP010909107
KERN D.J. ET AL.: "Metaferrites: using electromagnetic bandgap structures to synthesize metamaterial ferrites", IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol. 53, no. 4, 2005, pages 1382 - 1389, XP001227388
KERN D.J. ET AL.: "The synthesis of metamaterial ferrites for RF applications using electromagnetic bandgap structures", ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 2003. IEEE, vol. 1, 2003, pages 497 - 500, XP010649508
NOMURA T.: "Topology Saitekika Shuho o Mochiita Denjikai Simulation -EBG Zairyo Kozo no Sekkei- (Electromagnetic Simulator using Topology Optimization Method -Design of Electromagnetic Band-gap Material Structure-)", TECHNICAL REPORT OF IEICE MW2005-36, vol. 200, pages 21 - 25, XP003022661
Attorney, Agent or Firm:
YAMAZAKI, Takuya (2-53 Zushi 5-chome,Zushi-cit, Kanagawa 06, JP)
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