ANTENNA APPARATUS AND COMMUNICATION SYSTEM - MATSUSHITA ELECTRIC IND CO LTD

Title:

ANTENNA APPARATUS AND COMMUNICATION SYSTEM

Document Type and Number:

WIPO Patent Application WO/2002/047202

Kind Code:

A1

Abstract:

A conventional antenna apparatus has had a drawback that performance is insufficient in the point of directivity or efficiency. An antenna apparatus comprising a spiral radiation element (11) provided with a power feed terminal (16), a spiral non-feed element (12) provided in parallel with the radiation element (11), a ground (15) opposite to the radiation element (11) and the non-feed element (12), a first connection electrode (13) for connecting one end of the non-feed element (11) to the ground (15), and a second connection electrode (14) for connecting one end of the non-feed element (12) to the ground (15), wherein the first and second connection electrodes (13, 14) are shifted from each other in a direction in a plane including the spiral shapes.

Inventors:

KANE JOJI (JP)
ISHIHARA HIROTAKA (JP)

Application Number:

PCT/JP2001/010665

Publication Date:

June 13, 2002

Filing Date:

December 06, 2001

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
KANE JOJI (JP)
ISHIHARA HIROTAKA (JP)

International Classes:

H01Q21/20; H01Q1/36; H01Q1/38; H01Q9/04; H01Q9/42; H01Q19/00; H01Q21/24; (IPC1-7): H01Q1/36; H01Q1/38; H01Q9/04; H01Q21/20

Foreign References:

EP1011167A1	2000-06-21
JPH11330842A	1999-11-30
JPH08298405A	1996-11-12
JPH11150412A	1999-06-02
JP2997451B1	2000-01-11
JP3032664B2	2000-04-17
JPH11214914A	1999-08-06

Other References: