Communications: radio wave antennas – Antennas – With radio cabinet
Reexamination Certificate
1999-07-13
2001-04-03
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
With radio cabinet
C343S906000
Reexamination Certificate
active
06211827
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an improved antenna for a radio transmitter and receiver, and particularly to an improved antenna for a radio transmitter and receiver radios such as a Personal Communication Service (PCS) system.
BACKGROUND ART
Generally, a radio transmitter and receiver is used for performing a radio transmission and receiving operation, whereby a high frequency signal outputted from a modulator is transmitted to an antenna of the radio transmitter and is transmitted therefrom to a remote radio transmitter and receiver, or the thusly transmitted signal is received through another antenna.
In order to improve a radio transmitting and receiving characteristic of the radio transmitter and receiver, the impedances of the antenna and the radio transmitter and receiver must be accurately matched in accordance with a frequency to be transmitted and received, and a radio loss must be necessarily reduced.
FIG. 1
is a perspective view illustrating a lower portion of a conventional antenna.
As shown therein, there is provided an antenna
1
which is rotatably fixed to one end of a support portion
2
, with the antenna
1
and the support portion
2
being separable.
FIG. 2
is a perspective view illustrating a lower portion of another conventional antenna assembly
As shown therein, an antenna
5
is threadably coupled to a support portion
3
by using an engaging member
4
, with the antenna
5
and the support portion
2
being separable.
However, in such conventional antennas, since the support portions
2
and
3
for supporting the antennas
1
and
5
are not integral, the antenna assemblies are very difficult to fabricate. In addition, in order to fix the antennas
1
and
5
to the support portions
2
and
3
, a hole or a screw portion must be additionally formed in the support portions
2
and
3
, for thus fixing the antennas
1
and
5
thereto, so that the constructions thereof become complicated, whereby the fabrication cost is increased.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide an antenna for a radio transmitter and receiver which overcomes the aforementioned problems encountered in the conventional radio transmitter and receiver antenna assemblies.
It is another object of the present invention to provide an antenna for a radio transmitter and receiver which is capable of more efficiently transmitting and receiving radios signals by providing the antenna in a radio transmitter and receiver such as a Personal Communication Service (PCS) system.
To achieve the above objects, there is provided an antenna for a radio transmitter and receiver which includes an integral type support portion having a circular groove formed in one end thereof, and a connection member having a circular insertion portion and an elongated hole, whereby the insertion portion of the connection member is elastically and separably inserted into the groove of the support portion.
To achieve the above objects, there is provided an antenna for a radio transmitter and receiver which includes a connection member is rotatable by 360° in the groove of the support portion.
Additional advantages, objects and other features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and advantages of the invention may be realized and attained as particularly pointed out in the appended claims.
REFERENCES:
patent: 5880696 (1999-03-01), Koleda
patent: 5907306 (1999-05-01), Karabinis et al.
patent: 5926138 (1999-07-01), Eerikainen
Coleman Henry D.
Le Hoang-anh
Sapone William J.
Sudol R. Neil
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