Antenna device and radio communication device comprising the...

Details Antenna device and radio communication device comprising the... Antenna device and radio communication device comprising the...

2002-06-28

2004-08-24

Chen, Shih-Chao (Department: 2821)

Communications: radio wave antennas

Antennas

Plural separate diverse type

C343S7000MS, C343S879000

Reexamination Certificate

active

06781553

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an antenna for mobile communications and to a radio communication apparatus including it.
BACKGROUND OF THE INVENTION
Mobile radio communication apparatuses such as portable telephones and pagers are recently used widespread. A mobile radio communication apparatus has a built-in antenna in a case. The mobile radio communication apparatus is a portable telephone with the built-in antenna, e.g. an inverted-F antenna generally used. The portable telephone operates as a complex terminal, thus requiring an antenna desirably transmit and receive signals in plural frequency bands.
FIG. 10
shows a conventional inverted-F antenna. The inverted-F antenna
10
includes a ground plane
11
, a conductive radiator
12
, a shorting section
14
for short-circuiting the ground plane
11
and the conductive radiator
12
, and a feeding section
15
for supplying power to the antenna. This inverted-F antenna has an antenna characteristic of a narrow frequency band as shown in FIG.
9
.
DISCLOSURE OF THE INVENTION
A small antenna used for a mobile radio communication apparatus such as portable telephone operates in a broad frequency band and corresponds to plural frequency bands.
The antenna includes a first conductive radiator having a plane shape and a second conductive radiator having a helical shape. A feeding section is made of a planar element, is disposed between the first conductive radiator having the planer shape and a ground plane, and supplies power by electromagnetic coupling, thereby providing the antenna with a broader frequency band.


REFERENCES:
patent: 5926139 (1999-07-01), Korisch
patent: 6211830 (2001-04-01), Monma et al.
patent: 6326921 (2001-12-01), Egorov et al.
patent: 6343208 (2002-01-01), Ying
patent: 61-041205 (1986-02-01), None
patent: 06-037533 (1994-02-01), None
patent: 06-232625 (1994-08-01), None
patent: 07-283631 (1995-10-01), None
patent: 09-098018 (1997-04-01), None
patent: 09-107238 (1997-04-01), None
patent: 09-153733 (1997-06-01), None
patent: 10-145134 (1998-05-01), None
patent: 11-289215 (1999-10-01), None
patent: 2000-183644 (2000-06-01), None
patent: 2000-278028 (2000-10-01), None
patent: WO 01/08257 (2001-02-01), None
Japanese search report for PCT/JP01/06728 dated Oct. 30, 2001.
English translation of Form PCT/ISA/210, dated Jul., 1998.

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