Chip antenna

Details Chip antenna Chip antenna

2001-11-05

2003-08-12

Clinger, James (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S702000, C343S895000

Reexamination Certificate

active

06606060

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a chip antenna which is used in mobile communication terminals, local area networks (LAN) and the like. Particularly, the present invention relates to a chip antenna in which a part of an antenna conductor line is formed on the surface of a circuit board, and an antenna body with an antenna formed therein can be installed on the circuit board in a simple manner, so that the installation of the chip antenna can be rendered easier, and that the thickness of the chip antenna can be reduced.
BACKGROUND OF THE INVENTION
Japanese Laid-open Patent Application No. Hei-10-93320 discloses a chip antenna for use in mobile communication terminals, LAN and the like.
As shown in
FIG. 1
, this chip antenna includes: a parallelepiped antenna body
10
having a installation face; an internal conductor line
20
formed helically within the antenna body
10
and having a dipping terminal
30
on its end, for being connected to the conductor line
20
; and a fixing terminal
40
formed on another end of the antenna body
10
, for fixing the chip antenna
50
.
Further, as shown in
FIG. 2
, a capacitance-forming electrode is formed within the chip antenna so as to insert an LC resonance circuit
60
into the parallelepiped antenna body
10
.
In the conventional chip antenna
50
constituted as described above, the conductor line
20
is formed within the antenna body
10
to form an antenna. Accordingly, the occupation area of the conductor line
20
is increased, and therefore, the thickness of the chip antenna
50
is increased, this being a serious disadvantage.
Further, in the case where a separate LC resonance circuit
60
is formed within the antenna body
10
of the chip antenna, the capacity of the circuit
60
is limited by the antenna body
10
. Further, when the chip antenna
50
is fixed, there has to be provided a fixing terminal
40
which is not related to the conductor line in anyway, this being also a disadvantage.
SUMMARY OF THE INVENTION
The present invention is intended to overcome the above described disadvantages of the conventional techniques.
Therefore it is an object of the present invention to provide a chip antenna in which apart of an antenna conductor line is formed on the surface of a circuit board, and an antenna body with an antenna formed therein can be installed on the circuit board in a simple manner, so that the installation of the chip antenna can be rendered easier, and that the thickness of the chip antenna can be reduced.
It is another object of the present invention to provide a chip antenna in which a separate fixing terminal for fixing the chip antenna to the antenna body is not required, and in forming an LC resonance circuit on a PCB, a chip capacitor and a chip inductor can be easily installed.
In achieving the above objects, the chip antenna according to the present invention includes an antenna body having an antenna-forming conductor line located therein, and a feeding terminal located on one end thereof an antenna-forming conductor pattern located on a face of a PCB (Printed Circuit Board) and arranged to be connected to the conductor line of the antenna body; a feeding line located on one side of the conductor pattern on the face of the PCB and arranged to be connected to the feeding terminal of the antenna body; and a fixing terminal located on another side of the conductor pattern on the face of the PCB and arranged to be connected to the conductor line of the antenna body, wherein the antenna body is mounted on the face of the PCB.


REFERENCES:
patent: 6075491 (2000-06-01), Dakeya et al.
patent: 6204819 (2001-03-01), Hayes et al.
patent: 6320545 (2001-11-01), Nagumo et al.
patent: 6504508 (2003-01-01), Apostolos
patent: 10-093320 (1998-10-01), None

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