Title:
ANTENNA STRUCTURE AND WIRELESS COMMUNICATION APPARATUS PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2007/020728
Kind Code:
A1
Abstract:
An antenna structure is provided with a radiation electrode (4) for a high frequency band,
for performing antenna operation at a resonance frequency of the high frequency band,
and a base body (3) whereupon the radiation electrode (4) is arranged. The base
body (3), for instance, is mounted on a printed board (2), and in a region whereupon the
base body (3) is mounted, for instance, a coil-like radiation electrode (5) for
a low frequency band is arranged. The radiation electrode (4) is formed on the
base body (3), except on a base body portion whereupon a magnetic field having a
high magnetic flux density passes at a coil center part of the radiation electrode (5).
The base body (3) is composed of a mixed material including a dielectric material and
a magnetic material.
Inventors:
TSUBAKI NOBUHITO (JP)
KAWAHATA KAZUNARI (JP)
KAWAHATA KAZUNARI (JP)
Application Number:
PCT/JP2006/304620
Publication Date:
February 22, 2007
Filing Date:
March 09, 2006
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
TSUBAKI NOBUHITO (JP)
KAWAHATA KAZUNARI (JP)
TSUBAKI NOBUHITO (JP)
KAWAHATA KAZUNARI (JP)
International Classes:
H01Q21/28; H01Q1/24; H01Q1/38; H01Q5/10; H01Q21/30
Domestic Patent References:
| WO2002013312A1 | 2002-02-14 | |||
| WO1997040548A1 | 1997-10-30 |
Foreign References:
| JP2003060425A | 2003-02-28 | |||
| JPH05299925A | 1993-11-12 | |||
| JP3420232B2 | 2003-06-23 | |||
| JP2002171126A | 2002-06-14 | |||
| JP2002050924A | 2002-02-15 | |||
| JP2003234617A | 2003-08-22 | |||
| JPH09130112A | 1997-05-16 | |||
| JPH0969717A | 1997-03-11 | |||
| JP2000278037A | 2000-10-06 | |||
| JPH11297532A | 1999-10-29 | |||
| JP2004048369A | 2004-02-12 |
Attorney, Agent or Firm:
IGARASHI, Kiyoshi (Yokohamahigashiguchi Bldg. 10-13, Takashima 2-chome, Nishi-ku, Yokohama-sh, Kanagawa 11, JP)
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