Abstract:
A wireless communication device includes a housing and an antenna. The housing is made of metal and defines a conductive chamber. The chamber includes a bottom wall, two opposite first side walls, and two opposite second side walls connecting to the first side walls, the first side walls and the second side walls surrounding around the bottom wall. The antenna comprises a radiating body, a feed end, and a ground end. The radiating body is suspended above the chamber and distanced from the conductive chamber in such a way that the antenna functions in a resonance mode with the conductive chamber, in operating at the required frequencies. The feed end and ground end extend from the radiating body and are connected to one of the second side walls.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The disclosure generally relates to wireless communication devices, and particularly to a wireless communication device having an integrated metal appearance and a better transmitting performance. 
         [0003]    2. Description of Related Art 
         [0004]    Metal shells are widely used in wireless communication devices because of the advantages of mechanical strength, resistance to deformation, and tactile sensation. However, the metal shells may shield and interfere with signals radiated by antennas of the wireless communications and narrows working frequencies of the antennas. 
         [0005]    In a conventional way to reduce the interference, the wireless communication device commonly includes a housing having a non-metal portion (such as a plastic portion) adjacent to the antenna so that the antenna is apart from a metal portion of the housing. However, the joint between the non-metal portion and the metal portion does not have an integrated or seamless appearance. 
         [0006]    Therefore, there is room for improvement within the art. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    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. 
           [0008]      FIG. 1  is a schematic view of a wireless communication device having an antenna, according to a first exemplary embodiment of the disclosure. 
           [0009]      FIG. 2  is a top view, schematic view of the wireless communication device of  FIG. 1 . 
           [0010]      FIG. 3  is a top, schematic view of a wireless communication device having an antenna, according to a second exemplary embodiment of the disclosure. 
           [0011]      FIG. 4  is a top, schematic view of a wireless communication device having an antenna, according to a third exemplary embodiment of the disclosure. 
           [0012]      FIG. 5  is a top, schematic view of a wireless communication device having an antenna, according to a fourth exemplary embodiment of the disclosure. 
           [0013]      FIG. 6  is a diagram showing return loss (RL) measurements of the antennas shown in  FIGS. 2-4 . 
           [0014]      FIG. 7  is a diagram showing return loss (RL) measurements of the antenna shown in  FIG. 5 . 
       
    
    
     DETAILED DESCRIPTION 
       [0015]      FIG. 1  is a schematic view of a wireless communication device  100 , according to a first exemplary embodiment of the disclosure. The wireless communication device  100  includes a housing  10  and an antenna  30  positioned in the housing  10 . 
         [0016]    The housing  10  is substantially rectangular and made of metal. A screen  11  is positioned on a first end of the housing  10 . A chamber  12  is defined in a second end of the housing  10  adjacent to the screen  10 . The chamber  12  includes a bottom wall  121 , two opposite first side walls  123 , and two opposite second side walls  125  connected to the first side walls  123 . The first side walls  123  and the second side walls  125  surround the bottom wall  121 . A length of each of the second side walls  125  is slightly longer than that of each of the first side walls  123 . In this exemplary embodiment, the chamber  12  is substantially rectangular. 
         [0017]    Also referring to  FIG. 2 , the antenna  30  is a single-pole antenna including a radiating body  33 , a feed end  35 , and a ground end  37 . The radiating body  33  is made of conductive materials such as a metal sheet or a flexible printed circuit board. In this exemplary embodiment, the radiating body  33  is substantially a rectangular sheet. The feed end  35  and the ground end  37  are both strip-shaped. A length of the feed end  35  is slightly shorter than that of the ground end  37 . The feed end  35  and the ground end  37  extend from a first end of the radiating body  33 , and are parallel and spaced from each other. The feed end  35  is connected to one of the second side walls  125  far away from the screen  11  by a connection member  40 . The connection member  40  may be a coaxial cable. The ground end  37  is directly connected to the other of the second side walls  125 . The radiating body  33  is suspended above a central portion of the chamber  12 . A second end of the radiating body  33  opposite to the feed end  35  and the ground end  37  defines a first gap with the other of the second side walls  125  adjacent to the screen  11 . A width of the first gap can be changed to facilitate the antenna  30  functioning in a resonance mode with the chamber  12  and obtain a first working frequency band. In the first exemplary embodiment, the first working frequency band is the GPS frequency band or the WiFi 2.4 GHz. The antenna  30  can be supported by a base formed by screen glass or an antenna carrier or the like. 
         [0018]    In this exemplary embodiment, the dimensions of the chamber  12  are about 50 mm×10 mm×8 mm. The dimensions of the radiating body  33  are about 9.8 mm×3 mm. The width of the first gap is about 0.2 mm. 
         [0019]    In other exemplary embodiments, the chamber  12  can be entirely formed within the housing  10  and also can be cooperatively formed by the housing  10  and other metal member such as a metal rear cover of the screen  11 , a system ground plane, a metal shield, or a metal plane. 
         [0020]      FIG. 3  is a schematic view of a wireless communication device  200 , according to a second exemplary embodiment of the disclosure. The wireless communication device  200  is substantially similar to the wireless communication device  100 . The wireless communication device  200  includes a housing  10  and antenna  50 . The antenna  50  includes a radiating body  53 , a feed end  55  and a ground end  57 . 
         [0021]    The difference between the wireless communication device  200  and the wireless communication device  100  is that the radiating body  53  of the wireless communication device  200  is substantially L-shaped. The radiating body  53  includes a first radiating section  531  and a second radiating section  533  perpendicularly connected to the first radiating section  531 . The feed end  55  and the ground end  57  extend from an end of the first radiating section  531  opposite to the second radiating section  533 , and are parallel and spaced from each other. The second radiating section  533  defines a second gap with one of the second side walls  125 . The other structures of the wireless communication device  200  are substantially similar to the wireless communication device  100 . 
         [0022]    In the second exemplary embodiment, the dimensions of the chamber  12  are about 50 mm×10 mm×8 mm. The dimensions of the radiating body  53  are about 9 mm×7.6 mm. A width of the second gap is about 1 mm. 
         [0023]      FIG. 4  is a schematic view of a wireless communication device  300 , according to a third exemplary embodiment of the disclosure. The wireless communication device  300  is substantially similar to the wireless communication device  100 . The wireless communication device  300  includes a housing  10  and antenna  60 . The antenna  60  includes a radiating body  63 , a feed end  65  and a ground end  67 . 
         [0024]    The difference between the wireless communication device  300  and the wireless communication device  100  is that the radiating body  63  of the wireless communication device  300  is substantially T-shaped. 
         [0025]    The radiating body  63  includes a first radiating section  631  and a second radiating section  633  perpendicularly connected to a middle portion of the first radiating section  631 . The feed end  65  and the ground end  67  extend from an end of the first radiating section  631  opposite to the second radiating section  633 , and are parallel and spaced from each other. The second radiating section  633  defines a third gap with one of the second side walls  125 . The other structures of the wireless communication device  300  are substantially similar to the wireless communication device  100 . 
         [0026]    In the third exemplary embodiment, the dimensions of the chamber  12  are about 50 mm×10 mm×8 mm. The dimensions of the radiating body  53  are about 12 mm×8.2 mm. A width of the third gap is about 1.7 mm. 
         [0027]      FIG. 5  is a schematic view of a wireless communication device  400 , according to a fourth exemplary embodiment of the disclosure. The wireless communication device  400  is substantially similar to the wireless communication device  100 . The wireless communication device  400  includes a housing  10  and antenna  70 . The antenna  70  includes a radiating body  73 , a feed end  75  and a ground end  77 . 
         [0028]    The difference between the wireless communication device  400  and the wireless communication device  100  is that the radiating body  73  of the wireless communication device  400  is substantially rectangular. The feed end  75  and the ground end  77  are extended from one side of the radiating body  73 , and are parallel and spaced from each other. A slot  731  is formed between the feed end  75  and the ground end  77 . The radiating body  73  defines a cut  733  at one end of the radiating body  73  adjacent to the ground end  77 . The radiating body  73  defines a fourth gap with one of the second side walls  125 . The other structures of the wireless communication device  400  are substantially similar to the wireless communication device  100 . 
         [0029]    In the fourth exemplary embodiment, the dimensions of the chamber  12  are about 50 mm×10 mm×8 mm. The dimensions of the radiating body  73  are about 16 mm×8.1 mm. A width of the fourth gap is about 1.9 mm. 
         [0030]    The curves S 51 , S 52 , and S 53  shown in  FIG. 6  represent return loss of the antennas  30 ,  50  and  60  which are shown in  FIGS. 2-4 , respectively. According to test results shown in  FIG. 6 , each of the wireless communication devices  100 ,  200 ,  300  can work at a frequency band of Bluetooth/WiFi 2.4 GHz. 
         [0031]    The curves S 61  shown in  FIG. 7  represent return loss of the wireless communication device  400  when the antenna  70  is positioned above a central portion of the chamber  12 . The curves S 62  represents return loss of the wireless communication device  400  when the antenna  70  is positioned away from the central portion of the chamber  12  and is positioned at a position having a distance about 0.5 mm from the first side wall  123 . According to test results shown in  FIG. 7 , the wireless communication  400  also can work at the frequency band of Bluetooth/WiFi 2.4 GHz/5 GHz. 
         [0032]    The antennas  30 ,  50 ,  60 ,  70  are coupled with the chamber  12  to function when able to resonate with the chamber  12  and obtain the necessary frequency bands. Thus, the housing  10  does not need to have a non-metal portion and can have an integrated metal appearance. 
         [0033]    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.