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Title:
RADIO COMMUNICATION TERMINAL
Document Type and Number:
Japanese Patent JP2009165003
Kind Code:
A
Abstract:

To provide a radio communication terminal compatible with a plurality of frequency bands using one parasitic element.

Between a parasitic element 10 and a ground pattern 11 of a circuit board, a first parasitic element connecting part 12 is interposed which includes a first band limiting section 122 capable of passing through only a signal of a band of 800 MHz and a first reactance element 121 for resonating the parasitic element 10 in the frequency band of 800 MHz when a radio communication terminal 1 is disposed on a metal plate, and between the parasitic element 10 and the ground pattern 11, a second parasitic element connecting part 13 is interposed which includes a second band limiting section 132 capable of passing through only signals of a frequency band of 1.7 GHz to 2.1 GHz and a second reactance element 131 for resonating the parasitic element 10 in the frequency bands when the radio communication terminal 1 is disposed on the metal plate. One parasitic element 10 therefore is compatible with the two frequency bands and in comparison with a case where the parasitic element is provided for each frequency band desired to use, the space saving and cost reduction of the radio communication terminal 1 can be attained.


Inventors:
Kikuchi, Kojun
Application Number:
JP2008000002088
Publication Date:
July 23, 2009
Filing Date:
January 09, 2008
Export Citation:
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Assignee:
PANASONIC CORP
International Classes:
H01Q1/48; H01Q1/24; H01Q5/00; H01Q5/10; H01Q5/328; H01Q5/378; H04B1/38; H04M1/02; H04W88/02
Domestic Patent References:
JP2009159227A2009-07-16
JP2005244553A2005-09-08
JPH1028013A1998-01-27
JP2006050496A2006-02-16
Attorney, Agent or Firm:
小栗 昌平
市川 利光
橋本 公秀