ANTENNA, AND COMMUNICATION DEVICE USING THE SAME - MATSUSHITA ELECTRIC IND CO LTD

Title:

ANTENNA, AND COMMUNICATION DEVICE USING THE SAME

Document Type and Number:

WIPO Patent Application WO/2002/054533

Kind Code:

A1

Abstract:

An antenna comprising a substrate, a ground portion mounted on the substrate, a first radiation element disposed near the side face of the substrate, formed helically and having a center axis generally parallel to the side of the ground portion, and a high frequency circuit electrically connected with a part of the first radiation element. The degradation of the antenna gain due to the ground portion is suppressed, and watching at the working frequency is achieved by adjusting the number of turns of the helical first radiation element. Therefore, an antenna matching circuit can be dispensed with, and the radiation gain of the antenna can be improved.

Inventors:

FUKUSHIMA SUSUMU (JP)
SUEOKA KAZUHIKO (JP)
AOYAMA MOTOHARU (JP)

Application Number:

PCT/JP2001/010992

Publication Date:

July 11, 2002

Filing Date:

December 14, 2001

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
FUKUSHIMA SUSUMU (JP)
SUEOKA KAZUHIKO (JP)
AOYAMA MOTOHARU (JP)

International Classes:

H01Q1/36; H01Q5/00; H01Q5/378; H01Q7/00; H01Q11/08; H01Q21/30; (IPC1-7): H01Q1/24; H01Q7/00

Foreign References:

JP2000188506A	2000-07-04
JPH0969718A	1997-03-11
JPH08191209A	1996-07-23
JPH1188246A	1999-03-30
JP3034032U	1997-02-14
JPH09326632A	1997-12-16
JP2000307341A	2000-11-02
JPH10261914A	1998-09-29
JPH06169207A	1994-06-14
JP2000101335A	2000-04-07

Other References: