Patent Publication Number: US-8537056-B2

Title: Antenna and portable device employing the same

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a portable device, and more particularly to an antenna of the portable device. 
     2. Description of Related Art 
     In generally, a wire is used as an antenna and disposed around a liquid crystal module (LCM) of a portable device. However, the wire must be soldered to a printed circuit board (PCB) of the portable device making it difficult for the portable device to be mass produced. 
     Therefore, a need exists in the industry to overcome the described limitations. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is an isometric view of a portable device according to the present disclosure. 
         FIG. 2  is an enlarged view of part II of  FIG. 1  according to the present disclosure. 
         FIG. 3  is a disassembled perspective view of a printed circuit board and an antenna according to the present disclosure. 
         FIG. 4  is a perspective view of the antenna according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one. 
     Referring to  FIG. 1  and  FIG. 2 , a portable device comprises a main body  10  and an antenna  20  mounted on the main body  10 . The main body  10  comprises a printed circuit board (PCB)  12 . A first guide pole  124  and a second guide pole  128  are configured on the PCB  12 . In the illustrated embodiment, the first guide pole  124  and the second guide pole  128  are both vertical with respect to the PCB  12 . 
     In the illustrated embodiment, the antenna  20  is mounted around a display screen (not shown) of the portable device. Referred to  FIG. 3  and  FIG. 4 , the antenna  20  is configured in a shape of a hollow rectangle. The antenna  20  comprises a first conductor portion  30 , a second conductor portion  40  and an insulated portion  50 . In the illustrated embodiment, the first conductor portion  30  and the second conductor portion  40  are made of a metal material. The first conductor portion  30  comprises a first connecting end  304  electrically connected to the PCB  12  via the first guide pole  124 . The first connecting end  304  protrudes outwardly from the first conductor portion  30  and acts as a feed portion of the antenna  20 . Therefore, the first conductor portion  30  can receive communication signals and have the function of capacitance induction. The second conductor portion  40  is disposed between the first conductor portion  30  and the PCB  12  to shield electromagnetic interference (EMI) from electronic elements on the PCB  12 . The second conductor portion  40  can protect the first conductor portion  30  from EMI and comprises a second connecting end  404  electrically connected to the PCB  12  via the second guide pole  128 . The second connecting end  404  protrudes outwardly from the second conductor portion  40  and acts as a contact point of the antenna  20 . The second conductor portion  40  is used to protect the antenna  20  from interference signals generated by electronic elements on the PCB  12 . The interference signals can affect the antenna  20  to transceive communication signals and affect the capacitance induction of the antenna  20 . In the illustrated embodiment, the first connecting end  304  and the second connecting end  404  have the same shape. The insulated portion  50  is sandwiched between the first conductor portion  30  and the second conductor portion  40  to insulate the first conductor portion  30  from the second conductor portion  40 . In the illustrated embodiment, the insulated portion  50  is made of sponge. 
     In the other illustrated embodiment, another insulated portion  50  is stacked to a side of the second conductor portion  40  nearing the PCB  12  to prevent the second conductor portion  40  touching with a metal outline border of the display screen directly. 
     In assembly, the insulated portion  50  is mounted between the first conductor portion  30  and the second conductor portion  40 . The first connecting end  304  and the second connecting end  404  are disposed on the same side of the antenna  20  and spaced from each other. The first connecting end  304  and the second connecting end  404  are connected electronically with the first guide pole  124  and the second guide pole  128  to form a feed portion and a contact point of the antenna  20 , respectively. The communication frequency and the induction capability of the antenna  20  can be changed by changing the space between the first connecting end  304  and the second connecting end  404 . 
     Although the features and elements of the present disclosure are described as embodiments in particular combinations, each feature or element can be used alone or in other various combinations within the principles of the present disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.