ANTENNA AND RADIO DEVICE COMPRISING THE SAME - MATSUSHITA ELECTRIC IND CO LTD

Title:

ANTENNA AND RADIO DEVICE COMPRISING THE SAME

Document Type and Number:

WIPO Patent Application WO/2001/095430

Kind Code:

A1

Abstract:

An antenna for receiving a radio wave of a plurality of frequencies, excellent in gain, reliability, and productivity and a radio device comprising the same. One end of a feeding part of the antenna is electrically connected to an antenna element part; the other is electrically connected to a high frequency circuit of a radio device. The rod of a dielectric mechanically holds the antenna element part. A radome of a dielectric covers the antenna element part and a part of the feeding part. The antenna element part comprises a rod, a generally spiral section concentric with the rod and composed of a narrow band conductive plate, and a generally meandered section. The dimensions of the generally spiral section and generally meandered section are adequately determined, thereby realizing favorable impedance characteristics in frequency bands.

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Inventors:

OHARA MASAHIRO (JP)
FUKUMURA TOYOSHI (JP)

Application Number:

PCT/JP2001/004868

Publication Date:

December 13, 2001

Filing Date:

June 08, 2001

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
OHARA MASAHIRO (JP)
FUKUMURA TOYOSHI (JP)

International Classes:

H01F5/00; H01Q1/24; H01Q1/36; H01Q1/40; H01Q5/10; H01Q5/357; H01Q9/30; (IPC1-7): H01Q1/36; H01Q1/24; H01Q5/01

Foreign References:

JPH0576111U	1993-10-15
JPH1093315A	1998-04-10
EP0997970A1	2000-05-03
EP0777293A1	1997-06-04

Other References: