ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE COMPRISING THE SAME

Title:

ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE COMPRISING THE SAME

Document Type and Number:

WIPO Patent Application WO/2002/013312

Kind Code:

A1

Abstract:

An antenna device used for a mobile radio device such as a portable telephone, having a wider frequency band than conventional, adapted to a plurality of frequencies, and small enough to be installed in a case. The antenna device includes a first radiation conductive element of flat shape, a second radiation conductive element of helical shape, and a flat power feeding unit disposed insulatingly between the first radiation conductive element and the base plate and adapted to feed power by electromagnetic coupling. A radio communication device comprising such an antenna is also disclosed.

Inventors:

IGUCHI AKIHIKO (JP)
FUKUSHIMA SUSUMU (JP)
SATO YUKI (JP)

Application Number:

PCT/JP2001/006728

Publication Date:

February 14, 2002

Filing Date:

August 06, 2001

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
IGUCHI AKIHIKO (JP)
FUKUSHIMA SUSUMU (JP)
SATO YUKI (JP)

International Classes:

H01Q1/24; H01Q1/36; H01Q5/00; H01Q5/357; H01Q5/378; H01Q9/04; H01Q19/00; H01Q21/30; (IPC1-7): H01Q9/30; H01Q13/08

Foreign References:

JPH09107238A	1997-04-22
JPH07283631A	1995-10-27
JPH06232625A	1994-08-19
JPH09153733A	1997-06-10
JPS6141205A	1986-02-27
JPH0637533A	1994-02-10
JP2000278028A	2000-10-06
JPH11289215A	1999-10-19
JPH10145134A	1998-05-29
JPH0998018A	1997-04-08
JP2000183644A	2000-06-30

Other References: