Title:
CORE FOR ANTENNA, COIL ANTENNA, CLOCK, PORTABLE TELEPHONE, AND ELECTRONIC APPARATUS
Document Type and Number:
Japanese Patent JP3964401
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a core for an antenna and a coil antenna which are excellent in impact resistance and manufacturability, and are inexpensive.
SOLUTION: The coil antenna for transmission includes a core 1 made from an insulating soft magnetic material, and a coil 2 of 10T turn on an outer peripheral face of the core 1. The insulating soft magnetic material includes a soft magnetic material powder and an organic binder. The insulating soft magnetic material has magnetic permeability frequency characteristics in which the value of the real part μ' of complex magnetic permeability is ≥20 at frequency of 10 MHz or less, while the value of an imaginary part μ" is ≥10 at frequency of ≥10 MHz.
Inventors:
Yoshihiko Kato
Teshima Shin
Mitsuharu Sato
Teshima Shin
Mitsuharu Sato
Application Number:
JP2004131977A
Publication Date:
August 22, 2007
Filing Date:
April 27, 2004
Export Citation:
Assignee:
NEC TOKIN CORPORATION
International Classes:
H01F1/26; H01F1/147; H01F3/08; H01Q1/24; H01Q1/27; H01Q7/06; H01Q7/08; (IPC1-7): H01F1/26; H01F1/147; H01F3/08; H01Q1/24; H01Q7/08
Domestic Patent References:
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Attorney, Agent or Firm:
Kenho Ikeda
Keisuke Yamamoto
Keisuke Yamamoto