Title:
アンテナ構造およびそれを備えた無線通信機
Document Type and Number:
Japanese Patent JP4158832
Kind Code:
B2
Abstract:
In an antenna structure 1 in which a feed radiation electrode 7 provided on a dielectric base member 6 performs an antenna operation in a fundamental mode and an antenna operation in a higher-order mode with a resonant frequency higher than that in the fundamental mode, one end of the feed radiation electrode 7 defines a feed end 7A connected to a circuit for radio communication, and the other end 7B of the feed radiation electrode defines an open end. The position of a capacitance-loading portion a is set in advance between the feed end 7A and the open end 7B of the feed radiation electrode 7. A capacitance-loading conductor 12 is connected to one or both of the feed end 7A and the capacitance-loading portion ± of the feed radiation electrode 7. The capacitance-loading conductor 12 forms a capacitance for adjusting a resonant frequency in the fundamental mode between the feed end 7A and the capacitance-loading portion ±.
Inventors:
Nao Ishihara
Kengo Onaka
Shoji Nagumo
Kengo Onaka
Shoji Nagumo
Application Number:
JP2006522835A
Publication Date:
October 01, 2008
Filing Date:
December 01, 2005
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01Q5/10; H01Q1/24; H01Q1/38; H01Q9/42
Domestic Patent References:
| JP2003008326A | ||||
| JP2001217631A | ||||
| JP2001217643A | ||||
| JP2001298313A | ||||
| JP2005117082A | ||||
| JP2004193875A | ||||
| JP2004312364A |
Attorney, Agent or Firm:
Kiyoshi Igarashi