BUILT−IN ANTENNA APPARATUS - MATSUSHITA ELECTRIC IND CO LTD

Title:

BUILT−IN ANTENNA APPARATUS

Document Type and Number:

WIPO Patent Application WO/2003/010850

Kind Code:

A1

Abstract:

A built−in antenna apparatus the whole of which is much smaller and much thinner than conventional while widening the band without making the apparatus itself platelike, and which has an improved a gain and a reduced SAR (Specific Absorption Rate). Adjustment of the length and thickness of a dipole antenna (12) and those of a passive device (14) and the distance between them to predetermined values makes it possible to vary the self−impedance of the dipole antenna (12), self−impedance of the passive device (14), the mutual−impedances of the dipole antenna (12) and passive device (14), and the input impedance of a built−in antenna apparatus (10), resulting in widening of the band.

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Inventors:

KOJIMA SUGURU (JP)
ITO HIDEO (JP)

Application Number:

PCT/JP2002/007408

Publication Date:

February 06, 2003

Filing Date:

July 23, 2002

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
KOJIMA SUGURU (JP)
ITO HIDEO (JP)

International Classes:

H01Q1/24; H01Q19/30; H01Q1/38; H01Q5/00; H01Q9/16; H01Q19/00; (IPC1-7): H01Q1/24

Foreign References:

JP2002151923A	2002-05-24
JPS61205004A	1986-09-11
JP2001085920A	2001-03-30
JPH11274845A	1999-10-08
JPH08335818A	1996-12-17
JP2000004120A	2000-01-07
JP2001077611A	2001-03-23

Other References: