Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
2001-06-15
2003-06-03
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S895000
Reexamination Certificate
active
06573870
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a portable wireless communication system, and more particularly, to an antenna for use of portable wireless communication system in which configurations of a spring and a C-ring arranged in an interior of a helical antenna are enhanced so as to obtain an enhanced bandwidth, so that quality of communication may not be deteriorated by a frequency movement, so as to thereby allow the standing-wave ratio to approximate to a reference value with an enhanced impedance.
BACKGROUND ART
In general, wireless communication system adopts an antenna for performing wireless communications, wherein, through the antenna, a high frequency signal output from a modulation unit of the wireless communication system is transmitted and the thus-transmitted radio wave is received.
For an enhanced transmission and receipt characteristics of antenna, impedance of the antenna and that of the transmitter or receiver may be matched according to the transmitting or receiving frequency, and an unnecessary emission may be prevented, thereby reducing a power loss.
Such an antenna has a single unit configuration, so that it functions as a helical antenna when retracted and as a rod antenna when extracted.
In addition, the antenna accommodates in a lower portion thereof a spring to improve a receipt state.
FIG. 1
illustrates a conventional antenna unit of wireless communication system, wherein an antenna unit
20
includes a handle
21
to be used when extracting or retracting an antenna, an insulator unit
22
, a helical antenna
23
to be coupled to a main body
10
so as to operate when the antenna is retracted and which is provided with a spring
25
, and a Ni—Ti wire
24
to be coupled to the helical antenna
23
so as to function as an antenna when the antenna is extracted.
FIG. 2
illustrates a spring unit of a conventional antenna. In detail,
FIG. 2
shows the spring
25
housed in the helical antenna
23
, a metal rod
26
to which the spring
25
is to be coupled, and a rubber bobbin
27
which is to be inserted into the spring
25
so as to support the same, wherein one end of the spring
25
is inserted into the metal rod
26
by approximately 1 turn of the end of the spring
25
.
FIG. 3
illustrates a cross cut portion
28
and a C-ring
29
of the conventional helical antenna
23
.
DISCLOSURE OF INVENTION
Therefore, it is an object of the present invention to provide an antenna for use of wireless communication system in which a spring and a C-ring accommodated into a helical antenna have enhanced configuration.
To accomplish the above object of the invention, there is provided an antenna for use in wireless communication systems in which a spring housed in a helical antenna is made up of leaf spring rolled to a thickness of 0.5 mm and a C-ring formed of beryllium copper is heat-treated and pressed.
REFERENCES:
patent: 5227805 (1993-07-01), King et al.
patent: 5717408 (1998-02-01), Sullivan et al.
patent: 5859617 (1999-01-01), Fujikawa
patent: 6285340 (2001-09-01), Park et al.
patent: 6344827 (2002-02-01), Wu
patent: 0736926 (1996-10-01), None
patent: 9046117 (1997-02-01), None
patent: 9148825 (1997-06-01), None
Coleman Sudol Sapone P.C.
Le Hoang-anh
Sudol R. Neil
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