Patent Publication Number: US-6211827-B1

Title: Antenna for radio transmitter and receiver

Description:
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. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein: 
     FIGS. 1 and 2 are perspective views illustrating respective conventional antennas; and 
     FIG. 3 is a perspective view illustrating a radio transmitter and receiver antenna according to the present invention. 
    
    
     MODES FOR CARRYING OUT THE INVENTION 
     As shown in FIG. 3, a support portion  11  having a circular groove  10  formed in one end thereof is an integral or unitary element. A connection member  15  having a circular insertion portion  13  and an elongated hole  14  is formed in a lower end of an antenna  12 . The insertion portion  13  of the connection member  15  is inserted in an elastic or snap-lock fit into the groove  10 . In the drawings, reference numeral  16  denotes a spring. 
     The insertion portion  13  of the connection member  15  has a cut-away portion not shown for easier insertion into the groove  10 . 
     Since the support insertion  11  of the antenna  12  is integrally formed, the insertion portion  13  of the connection member  15  is elastically inserted into the groove  10  formed in one end of the support portion  11 , both ends of the insertion portion  13  becoming widened under elastic forces from the portion  10 , for thus easily inserting the insertion portion  13  into the hole portion. After the insertion portion  13  of the connection member  15  is inserted into the groove  10 , the insertion portion  13  is returned to its original shape by the restoring force itself, thus preventing the connection member  15  from escaping from the groove  10 . 
     In addition, to the manner of coupling, the connection member  15  and the groove  10 , the connection member  15  is rotatable through 360°, for thus easily adjusting the position of the antenna  12 . 
     As described above, in the antenna for a radio transmitter and receiver according to the present invention, it is possible to easily fabricate the antenna and reduce the fabrication cost. In addition, it is possible to rotate the antenna  12  through 360°, thus easily adjusting the position of the antenna  12 . 
     Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as recited in the accompanying claims.