Patent Publication Number: US-10784580-B2

Title: Metal-inteference-resisting dipole antenna

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 201811425351.1 filed in China on 27, Nov., 2018 the entire contents of which are hereby incorporated by reference. 
     BACKGROUND 
     1. Technical Field 
     The disclosure relates to a dipole antenna, more particularly to the metal-interference-resisting dipole antenna. 
     2. Related Art 
     Since the technology of the wireless communication is already grown completely, different antennas have been disposed in various electronic devices. Additionally, since the dipole antenna has the simple structure and is early to be applied, the dipole antenna has been widely used presently. 
     In general, the traditional dipole antenna is made by two coplanar metal planes and a cable connected between the two metal planes, so the area is larger than other components in the electronic device. Also, when there are metal properties closed to the dipole antenna, the operational efficiency of the dipole antenna will be obviously decreased. However, in order to meet the demand of the people for the electronic device with both of the variety functions and the quality appearance, in the present market, the configuration of the internal circuits in the electronic device is more and more complex, and there&#39;re more and more electronic devices configured with the metal housing. Hence, the configuration of the dipole antenna is limited by said above properties, and the problem thereof still needs to be improved. 
     As a result, it needs a dipole antenna with the function of metal interference resistance presently in order to improve said above problem. 
     SUMMARY 
     According to one or more embodiment of this disclosure, a metal-interference-resisting dipole antenna includes: a first metal plane, a second metal plane and a cable. The cable includes an inner conductor, an insulator and an outer conductor, wherein the inner conductor has a first inner connecting end and a second inner connecting end, the first inner connecting end is electrically connected to the first metal plane, the second inner connecting end is adapted for receiving a first feed signal, the inner conductor is partially covered by the insulator, the outer conductor is, corresponding to the inner conductor, disposed on an outer side of the insulator, and the outer conductor is electrically insulated from the inner conductor; and wherein the outer conductor has a first outer connecting end and a second outer connecting end, the first outer connecting end is electrically connected to the second metal plane, and the second outer connecting end is adapted for receiving a second feed signal. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure 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 disclosure and wherein: 
         FIG. 1  is the structure diagram of the metal-interference-resisting dipole antenna in an embodiment based on this disclosure. 
         FIG. 2  is the sectional view of the cable of the metal-interference-resisting dipole antenna in an embodiment based on this disclosure. 
         FIG. 3  is the structure diagram of the metal-interference-resisting dipole antenna in another embodiment based on this disclosure. 
         FIG. 4  is the structure diagram of the metal-interference-resisting dipole antenna in another embodiment based on this disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawings. 
     Please refer to  FIG. 1 , wherein  FIG. 1  is the structure diagram of the metal-interference-resisting dipole antenna  1  in an embodiment based on this disclosure. As  FIG. 1  shows, the dipole antenna  1  comprises a first metal plane  11 , a second metal plane  12 , a cable  13  and an antenna insulation layer  14 . The first metal plane  11  and the second metal plane  12  may be the plane and be parallel to each other. Also, the first metal plane  11  and the second metal plane  12  are preferable to have identical shapes and sizes. On the other hand, the first metal plane  11  and the second metal plane  12  is able to keep being electrically insulated from each other through the antenna insulation layer  14 , and be electrically connected to each other through the cable  13  connecting to an AC (alternating current) signal source (not shown in  FIG. 1 ). Hence, through the antenna insulation layer  14 , when the dipole antenna  1  is pressed by an external force, the first metal plane  11  and the second metal plane  12  won&#39;t be short circuit. Additionally, there&#39;s a distance d between the first metal plane  11  and the second metal plane  12 , and the distance d is preferable to be between 4 mm to 5 mm in order to keep the dipole antenna  1  operating in a proper efficiency; however, this disclosure is not limited by it. 
     For descripting specifically about the first metal plane  11  and the second metal plane  12 , please refer to  FIG. 1 . As  FIG. 1  shows, the first metal plane  11  has a first upper surface  111  and a first lower surface  112 , wherein the first upper surface  111  faces away from the first lower surface  112 . Similar to the first metal plane  11 , the second metal plane  12  has a second upper surface  121  and a second lower surface  122 , wherein the second upper surface  121  faces to the first lower surface  112  of the first metal plane  11 , and the second upper surface  121  is back to the second lower surface  122 . In this embodiment, since the first lower surface  112  of the first metal plane  11  faces to the second upper surface  121  of the second metal plane  12 , aforementioned antenna insulation layer  14  may be disposed on the first lower surface  112  and the second upper surface  121 . Hence, when there&#39;s an external force forced on the dipole antenna  1 , the first metal plane  11  and the second metal plane  12  are not touched each other for avoiding being short circuit. In addition, the antenna insulation layer  14  may be disposed on the first lower surface  112  of the first metal plane  11  only; alternatively, the antenna insulation layer  14  may be disposed on the second upper surface  121  of the second metal plane  12 , and this disclosure is not limited by the configuration of the antenna insulation layer  14 . 
     For descripting specifically about the structure of the cable  13 , please refer to  FIG. 2 .  FIG. 2  is the sectional view of the cable  13  of the metal-interference-resisting dipole antenna  1  in an embodiment based on this disclosure. As  FIG. 2  shows, the sectional view of the cable  13  is formed by a plurality of concentric circles. From the center to the periphery, the cable  13  sequentially includes an inner conductor  131 , an insulator  132 , an outer conductor  133  and a protective layer  134 . Specifically, the inner conductor  131  and the outer conductor  133  are adapted for transmitting the signal with two opposite transmission direction. Also, the insulator  132  is able to make the inner conductor  131  and the outer conductor  133  being electrically insulated from each other, and the protective layer  134  is able to cover and protect the outer conductor  133  so as to make the outer conductor  133  being electrically insulated from other conductive properties. Particularly, corresponding to the inner conductor  131 , the outer conductor  133  is disposed at the outer side of the insulator  132 . That is, the inner conductor  131  is partly covered by the insulator  132 , and the outer conductor  133  may be disposed as the way of covering the insulator  132 ; alternatively, the outer conductor  133  and the inner conductor  131  may be disposed as the way of two separate wires, and be electrically insulated from each other by the insulator  132 . Additionally, the outer conductor  133  is partly covered by the protective layer  134  in order to protect the structure of the cable  13  and keep the conductivity of the cable  13 . 
     For descripting specifically about the dipole antenna  1 , please refer to  FIG. 1  and  FIG. 2  together. Aforementioned inner conductor  131  comprises a first inner connecting end  131   a  and a second inner connecting end  131   b , wherein the inner conductor  131  of the cable  13  is partly exposed from the insulator  132  for forming the first inner connecting end  131   a , and the first inner connecting end  131   a  is electrically connected to the first metal plane  11  in order to form the feed point  110  at the connection. In addition, the inner conductor  131  is covered by the insulator  132  between the first metal plane  11  and the second metal plane  12 . Therefore, it may avoid the unexpected short circuit causing by the segments of the inner conductor  131  except for the first inner connecting end  131  contacting with the first metal plane  11 , and it may also avoid the unexpected short circuit causing by the inner conductor  131  is contacted with the second metal plane  12 . On the other hand, the second inner connecting end  131   b  of the inner conductor  131  is electrically connected to a AC signal source (not shown in the figures) so as to receive the first feed signal. Similarly, the outer conductor  133  has a first outer connecting end  133   a  and a second outer connecting end  133   b , wherein the first outer connecting end  133   a  is between the first metal plane  11  and the second metal plane  12 . Moreover, the insulator  132  protrudes from the first outer connecting end  133   a  of the outer conductor  133 , and the insulator  132  extends to the first inner connecting end  131   a  of the inner conductor  131 . Specifically, the outer conductor  133  is partly exposed from the protective layer  134  so as to from the first outer connecting end  133   a , and the outer conductor  133  is electrically connected to aforementioned second upper surface  121  for forming another feed point  120  at the connection. Additionally, the outer conductor  133  is electrically connected to the AC signal source at the second outer connecting end  133   b  for receiving the second feed signal from the AC signal source, wherein the first feed signal and the second feed signal are the AC electric signals with opposite phase. 
     Please refer to  FIG. 3 , wherein  FIG. 3  is the structure diagram of the metal-interference-resisting dipole antenna  1 ′ in another embodiment based on this disclosure. The main difference between this embodiment and aforementioned embodiment is: the first inner connecting end  131   a  of the inner conductor  131  of the cable  13  electrically connected to the first lower surface  112  of the first metal plane  11 , and a feed point  110  formed at the connection. In this embodiment, since the first inner connecting end  131   a  and the first outer connecting end  133   a  are both between the first metal plane  11  and the second metal plane  12 , the first upper surface  111  and the second lower surface  122  both are flat planes. It is worth mentioning, the dipole antenna  1  as shown in  FIG. 1 , since the second lower surface  122  of the second metal plane  12  is not electrically connected to the cable  13  directly, the second lower surface  122  of the dipole antenna  1  is a flat plane. Therefore, comparison with the dipole antenna mentioned in the prior art, the area of the dipole antenna  1  and the dipole antenna  1 ′ disclosed in this disclosure are reduced, and the dipole antenna  1  and the dipole antenna  1 ′ further comprise the metal-interference-resisting function. On the other hand, since both of the dipole antenna  1  and the dipole antenna  1 ′ have the flat planes facing to the outer side, the dipole antenna  1  and the dipole antenna  1 ′ are able to be disposed and fixed directly at the inner side of the housing or other elements. As a result, the dipole antenna  1  and the dipole antenna  1 ′ may be more flexible for configuration. 
     Please refer to  FIG. 4 , wherein  FIG. 4  is the structure diagram of the metal-interference-resisting dipole antenna  2  in another embodiment based on this disclosure. As the dipole antenna  2  shown in  FIG. 4 , since the connection and the configuration between the first metal plane  21 , the second metal plane  22 , the cable  13  and the antenna insulation layer  24  are the same as the dipole antenna  1  shown in  FIG. 1 , and the position for forming the feed point  110  and feed point  120  are also the same as the dipole antenna  1  shown in  FIG. 1 , the detailed description is not illustrated again. Comparison this embodiment with the embodiment in  FIG. 1 , the main difference is the first side circumference  213  having a first recess portion  214  forming a first opening. In addition, the first side circumference  213  is a part of the first metal plane  21 , and the first side circumference  213  is connected the first upper surface  211  to the first lower surface  212 . Similarly, the second side circumference  223  has a second recess portion  224 , and there&#39;s a second opening formed by the second recess portion  224 , wherein the first opening and the second opening are faced to the same direction. Specifically, as  FIG. 4  shows, both of the first opening and the second opening are faced to the positive y-axis direction. In addition, the second recess portion  224  is a part of the second metal plane  22 , and the second recess portion  224  is connected the second upper surface  221  to the second lower surface  222 . Since the dipole antenna  2  comprises the first recess portion  214  and the second recess portion  224 , without the interference in the operation of the dipole antenna  2 , other elements are able to be disposed in the inner side of the first recess portion  214  and the second recess portion  224  based on the applications in practice, and the space inside the electronic device is able to be used efficiently and flexibly. 
     As the detailed descriptions illustrated above, this disclosure provides a metal-interference-resisting dipole antenna. The dipole antenna in this disclosure is made by folding the typical dipole antenna, so the occupied space of the dipole antenna disposed in the electronic device may be reduced, and the operation of the dipole antenna may not be effected obviously when there&#39;s an object contained the metal materials closed to it. The dipole antenna in this disclosure not only comprises the unexpected result, but also improves the problem of the space configuration in the electronic device or other devices. 
     The embodiments depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings.