Title:
ANTENNA STRUCTURE AND RADIO COMMUNICATION DEVICE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/120763
Kind Code:
A1
Abstract:
An antenna structure (1) includes a circuit substrate (5) on which a base (2) having a radiation electrode (3) is mounted. The radiation electrode (3) is arranged on the base (2) so as to oppose to the circuit substrate surface via a gap. On the circuit substrate (5), there is formed an inter-ground capacity loading electrode (7) arranged to oppose to the radiation electrode (3) of the base (2) and having a capacity between itself and the radiation electrode (3). Moreover, on the circuit substrate (5), there is formed a ground electrode (6) with a gap to the inter-ground capacity loading electrode (7). Furthermore, a resonance frequency adjusting element (8) is arranged to make a connection between the inter-ground capacity loading electrode (7) and the ground electrode (6). The resonance frequency adjusting element (8) has a capacity or an inductance for adjusting the resonance frequency of the antenna structure (1) to a predetermined resonance frequency.
Inventors:
HIRANO SATORU (JP)
Application Number:
PCT/JP2005/012946
Publication Date:
November 16, 2006
Filing Date:
July 13, 2005
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
HIRANO SATORU (JP)
HIRANO SATORU (JP)
International Classes:
H01Q13/08
Foreign References:
| JP2002335117A | 2002-11-22 | |||
| JPH04347903A | 1992-12-03 | |||
| JP2002141740A | 2002-05-17 | |||
| JPH1013138A | 1998-01-16 | |||
| JPH07249925A | 1995-09-26 |
Attorney, Agent or Firm:
Igarashi, Kiyoshi (Yokohamahigashiguchi Bldg. 10-13, Takashima
2-chome, Nishi-k, Yokohama-shi Kanagawa 11, JP)
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