Abstract:
An antenna structure includes a feed portion, a ground portion, a first radiating body, a second radiating body, and a third radiating body. The feed portion is connected to a first shared portion of the first radiating body. The second radiating body further includes a second shared portion connected to the first shared portion. The first and second shared portions are included in a third radiating body together with a combining portion between the second shared portion and the ground portion. The first radiating body receives and sends wireless signals of a first frequency band, the second radiating body uses a second frequency band, and the third radiating body uses a third frequency band.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The disclosure generally relates to antenna structures and particularly to an antenna structure having a wider bandwidth and a wireless communication device using the antenna structure. 
         [0003]    2. Description of Related Art 
         [0004]    To communicate in multi-band communication systems, a bandwidth of an antenna of a wireless communication device such as a mobile phone needs to be wide enough to cover frequency bands of multiple bands. In addition, because of the miniaturization of the wireless communication device, space available for the antenna is reduced and limited. Therefore, it is necessary to design the antenna to have the wider bandwidth within a reduced and limited space. 
         [0005]    Therefore, there is room for improvement within the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    Many aspects of the present disclosure 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 disclosure. 
           [0007]      FIG. 1  is a schematic view of a wireless communication device having an antenna structure according to an exemplary embodiment. 
           [0008]      FIG. 2  is similar to  FIG. 1 , but viewed from another angle. 
           [0009]      FIG. 3  is a schematic view of the antenna structure of  FIG. 1 , according to an exemplary embodiment. 
       
    
    
     DETAILED DESCRIPTION 
       [0010]      FIG. 1  is a schematic view of an antenna structure  100  used in a wireless communication device (not labeled), according to an exemplary embodiment. The wireless communication device may be a mobile phone and has a global positioning system (GPS) function and a WIRELESS FIDELITY (WI-FI) function. In this exemplary embodiment, the antenna structure  100  is assembled on a main body  200  of the wireless communication device. The main body  200  may be a bracket for installing and supporting a printed circuit board (not shown) of the wireless communication device. 
         [0011]    Referring to  FIG. 2 , the main body  200  includes a first surface  201 , a second surface  202  opposite to the first surface  201 , a first side surface  203 , and a second side surface  204 . The first surface  201  may be a bottom surface and the second surface  202  may be a top surface. Both the first and second side surfaces  203 ,  204  are connected to the first surface  201  and the second surface  202 . A flange  210  extends from a junction of the first side surface  203  and the second side surface  204  and extends towards the first surface  201 . The flange  210  includes a first surface  211 , a second surface  212 , and a connecting surface  213  connected between the first surface  211  and the second surface  212 . 
         [0012]    The antenna structure  100  includes a feed portion  10 , a ground portion  20 , a first radiating body  30 , a second radiating body  40 , and a third radiating body  50 . 
         [0013]    In this exemplary embodiment, the feed portion  10  is positioned on the first surface  201  and the first side surface  203 . The feed portion  10  is electronically connected to a feed contact of the wireless communication device (not shown), which feeds current for the antenna structure  100 . The ground portion  20  is adjacent to the feed portion  10  and also positioned on the first surface  201  and the first side surface  203 . The ground portion  20  is electronically connected to a ground contact of the wireless communication device (not shown) and configured to provide a ground connection for antenna structure  100 . 
         [0014]    The first radiating body  30 , the second radiating body  40 , and the third radiating body  50  are electronically connected to the feed portion  10 . The third radiating body  50  is electronically connected to the ground portion  20 . 
         [0015]    The first radiating body  30  is positioned on the second surface  202  and the flange  210 . The first radiating body  30  includes a first shared portion  31 , a first extending portion  32 , a second extending portion  33 , a third extending portion  34 , a fourth extending portion  35 , and a fifth extending portion  36 , connected in that order. The first shared portion  31 , the first extending portion  32 , the second extending portion  33 , and the third extending portion  34  are coplanar. In this exemplary embodiment, the first shared portion  31 , the first extending portion  32 , the second extending portion  33 , and the third extending portion  34  are positioned on the second surface  202 . 
         [0016]    The first shared portion  31  includes a first shared section  311  and a second shared section  312 . The first shared section  311  is electronically connected to an end of the feed portion  10  positioned on the first side surface  203 . The second shared section  312  is perpendicularly connected to a distal end of the first shared section  311  away from the feed portion  10 , and extends away from the first shared section  311 . 
         [0017]    The first extending portion  32  includes a first extending section  321  and a second extending section  322 . A width of the first extending section  321  is less than the width of the second shared section  312 . The first extending section  321  extends from one end of the second shared section  312  away from the first shared section  311 . The second extending section  322  is connected to a distal end of the first extending section  321  away from the second shared section  312 , and extends away from the first shared section  311 . The second extending section  322  is parallel to the first shared section  311 . 
         [0018]    The second extending portion  33  is connected to a distal end of the second extending section  322  away from the first extending section  321 , extends away from the first shared section  311 , and is parallel to the first extending section  321 . 
         [0019]    The third extending portion  34  includes a third extending section  341  and a fourth extending section  342 . The third extending section  341  is connected to a distal end of the second extending portion  33  away from the second extending section  322 , and extends towards the first extending section  321 . The third extending section  341  is parallel to the second extending section  322 . The fourth extending section  342  is connected to a distal end of the third extending section  341  away from the second extending portion  33 , extends away from second extending section  322 , and is parallel to the second extending portion  33 . The second extending section  322 , the second extending portion  33 , and the third extending section  341  are spaced apart and therefore cooperatively form a first slot S1 between them. 
         [0020]    The fourth extending portion  35  is not coplanar with the first shared portion  31 , the first extending portion  32 , the second extending portion  33 , and the third extending portion  34 . In this exemplary embodiment, the fourth extending portion  35  is portioned on the second surface  212 . The fourth extending portion  35  includes a fifth extending section  351  and a sixth extending section  352 . The fifth extending portion  35  has one end perpendicularly connected to an end of the fourth extending section  342  away from the third extending section  341 , and another end perpendicularly connected to the sixth extending section  352 . 
         [0021]    The fifth extending portion  36  is positioned on the connecting surface  213  and connected to the sixth extending section  352  by an arced connection. The antenna structure  100  can obtain a first frequency band by adjusting a length of the first radiating body  30  and a size of the first slot S1. In this exemplary embodiment, the first frequency band is about 1570 MHz-1580 MHz (e.g., a frequency band of GPS). 
         [0022]    The second radiating body  40  includes the first shared portion  31 , a second shared portion  41 , a first radiating portion  42 , a second radiating portion  43 , and a third radiating portion  44 , connected in that order. The first shared portion  31 , the second shared portion  41 , and the first radiating portion  42  are coplanar. The second shared portion  41  is perpendicularly connected to the second shared section  312  and the first extending section  321 , and parallel to the first shared section  311 . The first radiating portion  42  is connected to a distal end of the second shared portion  41  and collinear with the second shared portion  41 . 
         [0023]    The second radiating portion  43  is not coplanar with the first shared portion  31 , the second shared portion  41 , and the first radiating portion  42 . In this exemplary embodiment, the second radiating portion  43  is positioned on the first side surface  211 . The second radiating portion  43  is substantially U-shaped and includes a first radiating section  431 , a second radiating section  432 , and a third radiating section  433 , connected in that order. The first radiating section  431  is perpendicularly connected to the first radiating portion  42 . The second radiating section  432  has one end perpendicularly connected to a distal end of the first radiating section  431  away from the first radiating portion  42 , and another end perpendicularly connected to the third radiating section  433 . The first radiating section  431 , the second radiating section  432 , and the third radiating section  433  cooperatively form a second slot S2 between them. 
         [0024]    The third radiating portion  44  includes a first resonating section  440 , a second resonating section  441 , and a third resonating section  442 , connected in that order. The first resonating section  440  and the second radiating portion  43  are coplanar. The first resonating section  440  is perpendicularly connected to a side of the third radiating section  433  away from the first radiating section  431  and parallel to the second radiating section  432 . The second resonating section  441  is positioned on the connecting surface  213 . The second resonating section  441  is connected to the first resonating section  440  by an arced connection and spaced from the fifth extending portion  36 . The third resonating section  442  is positioned on the second side surface  212 . The third resonating section  442  is connected to the second resonating section  441  by an arced connection and spaced from the sixth extending section  352 . The antenna structure  100  can obtain a second frequency band by adjusting a length of the second radiating body  40  and a size of the second slot S2, changing a distance between the second resonating section  441  and the fifth extending portion  36 , and changing a distance between the third resonating section  442  and the sixth extending section  352 . In this exemplary embodiment, the second frequency band is about 2400 MHz-2500 MHz (e.g., a frequency band of WI-FI). 
         [0025]    The third radiating body  50  includes the first shared portion  31 , the second shared portion  41 , and a combining portion  51 . The combining portion  51  is positioned on the second surface  202 . The combining portion  51  includes a first combining section  511  and a second combining section  512 . The first combining section  511  is perpendicularly connected to the second shared portion  41  and the first radiating portion  42 , extends towards the first shared section  311 , and is parallel to the second shared section  312 . The second combining section  512  is perpendicularly connected between the first combining section  311  and the ground portion  20 , and is parallel to the first shared section  311 . The antenna structure  100  can obtain a third frequency band by adjusting a length of the third radiating body  50 , changing a distance between the first combining section  511  and the second shared section  312 , and changing a distance between the second combining section  512  and the first shared section  311 . In this exemplary embodiment, the third frequency band is about 4900 MHz-5850 MHz (e.g., a frequency band of WI-FI). 
         [0026]    The antenna structure  100  includes a plurality of radiating bodies (e.g., the first to third radiating bodies  30 ,  40 , and  50 ) to transmit and receive signals of multiple frequency bands so that an overall bandwidth of the antenna structure  100  is widened. In addition, the first radiating body  30 , the second radiating body  40 , and the third radiating body  50  share the first shared portion  31 , and the second radiating body  40  and the third radiating body  50  share the first shared portion  31  and the second shared portion  41 , so that the structure of the antenna structure  100  is reduced and minimal space is required. 
         [0027]    It is believed that the exemplary embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the disclosure.