Abstract:
A hinge antenna comprises a metal hinge, a first metal connecting plate and a second metal connecting plate. The hinge antenna further comprises a microwave substrate, a signal feeding line, and a conductor, wherein the conductor is electrically connected to the microwave substrate and extended from the microwave substrate. Furthermore, the feed line of the signal feeding line is electrically connected to the microwave substrate and the ground line of the signal feeding line is electrically connected to the metal hinge, the first metal connecting plate, the second metal connecting plate, and an outside metal shield so that the metal hinge, the first metal connecting plate, the second metal connecting plate, and the outside metal shield can serve as a ground. The aforementioned configuration is utilized to form an antenna loop. In addition, the configuration of this antenna can be built in the interior space of the foldable electronic device.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Technical Field 
         [0002]    The present invention relates to a hinge antenna, and in particular to a hinge antenna can be used in a foldable electronic device. The antenna element is integrated with a hinge within the foldable electronic device, such that the hinge antenna can be accommodated within the interior space in the foldable electronic device. With such antenna structure, the effects of stabilization in structure, simplification in assembly and unification in appearance can be achieved. 
         [0003]    2. Description of the Prior Art 
         [0004]    With the rapid development of technologies, varieties of portable 3C electronic devices provide convenience for human life, and thus become indispensable. In recent years, due to the rapid growth of wireless communication, a large amount of data is transmitted to portable 3C electronic devices via wireless networks. As been an integrated configuration of portable 3C electronic device, it is necessary for antennas to be built in the 3C electronic device for receiving signals sent from wireless base stations. For example, it is common to see travelling people carrying laptops and communicating via networks for attaining needed information. The antenna is built in each laptop for receiving signals. 
         [0005]    Referring to  FIG. 6 , it is a schematic view showing a conventional antenna structure. As shown in  FIG. 6 , in general, one antenna is disposed on each of the left and right sides of the upper end of the laptop display screen in a symmetric manner, and the high-frequency coaxial cables are employed for the transmission of signals, as indicated in the dashed line in the figure. Since signal degradation, such as insertion loss, occurs when signals are transmitted by using coaxial cables, the effective transmission distance and signal quality are reduced. In addition, such signal degradation is more severe in the coaxial cable during wireless transmission in higher frequency. Moreover, the shell of the laptops is commonly made of metal which creates shielding effect and as results the signal reception of the antenna is affected. 
       SUMMARY OF THE INVENTION 
       [0006]    In view of the aforementioned long-existing problems, the present invention provides a hinge antenna, which can be effectively accommodated within a foldable electronic device. The hinge antenna includes a metal shaft, a first metal connecting plate and a second metal connecting plate. The first metal connecting plate and the second metal connecting plate are rotated by the metal shaft with respect to the metal hinge. The hinge antenna includes a signal feeding line, a microwave substrate and a conductor. The conductor, the metal shaft, the first metal connecting plate and the second metal connecting plate are configured to form a monopole antenna, a planar inverted-F antenna or loop antenna. Thus, the hinge antenna transmits the electromagnetic wave signal to the outer housing of the electronic device to construct an antenna loop for improving the radiation area and the antenna performance. With the design of the hinge antenna of the present invention, the effect of stabilization in structure, simplification in assembly and unification in appearance can be achieved without affecting the signal-receiving the signal-receiving quality of the antenna. 
         [0007]    According to the description above, a major objective of the present invention is to provide a hinge antenna, and the metal shaft of the metal hinge drives the first metal connecting plate and the second metal connecting plate to rotate with respect to the metal hinge, in which the hinge antenna includes a signal feeding line and a conductor. The hinge antenna is the main part of antenna which is arranged extendedly outward along the second metal connecting plate and is electrically connected to the signal feeding line. Therefore, there is no need to additionally install a micro-scale antenna that may influence the quality of electromagnetic signal transmission and reception. As resulted, the effect of structure stabilization, simplification and appearance unification can be achieved. 
         [0008]    Another major objective of the present invention is to provide a hinge antenna and the metal shaft of the metal hinge drives the first metal connecting plate and the second metal connecting plate to rotate with respect to the metal hinge. The hinge antenna includes a signal feeding line, a microwave substrate and a conductor. The hinge antenna is the antenna body extended outwardly along the microwave substrate and is electrically connected with a matching circuit such that the matching circuit on the microwave substrate can adjust the work bandwidth of the hinge antenna, so there is no need to additionally install a micro-scale antenna that may influence the quality of electromagnetic signal transmission and reception. As resulted, the effects of structure stabilization, assembly simplification and appearance unification can be achieved. 
         [0009]    Still another major objective of the present invention is to provide a hinge antenna accommodated within an interior space of a first housing and a second housing of a foldable electronic device. The hinge antenna utilizes the metal shaft to rotate the first metal connecting plate and the second metal connecting plate with respect to the metal hinge, in which the hinge antenna is connected to the metal shaft on the metal hinge of the foldable electronic device. The hinge antenna includes a signal feeding line and a conductor. The antenna body of the hinge antenna is extended outwardly along the second metal connecting plate, so there is no need to additionally install a micro scale antenna that may influence the quality of electromagnetic signal transmission and reception. As resulted, the effects of structure stabilization, assembly simplification and the shielding effect of metals can be suppressed. 
         [0010]    Another major objective of the present invention is to provide a hinge antenna accommodated within an interior space of a first housing and a second housing of a foldable electronic device. The hinge antenna utilizes the metal shaft to rotate the first metal connecting plate and the second metal connecting plate with respect to the metal hinge. The hinge antenna includes a signal feeding line, a microwave substrate and a conductor. The antenna body of the hinge antenna is extended outwardly along the microwave substrate and is electrically connected to the matching circuit on the microwave substrate. The matching circuit can adjust the work bandwidth of the hinge antenna and there is no need to additionally install a micro-scale antenna that may influence the quality of electromagnetic signal transmission and reception, and shielding effect of metals can be suppressed. 
         [0011]    According to the objectives above, the present invention provides a hinge antenna, which includes a metal hinge, a first metal connecting plate and a second metal connecting plate. One end of the first metal connecting plate and one end of the second metal connecting plate is connected to a metal joint plate. The metal hinge jointed the first metal connecting plate and the second metal connecting plate through the metal joint plate. The metal hinge further includes a metal shaft which is arranged in the metal joint plate and the first metal connecting plate and the second metal connecting plate are rotated by the metal shaft with respect to the metal hinge, the characteristic of the hinge antenna in that: a signal feeding line is provided for feeding an electromagnetic wave signal and a conductor is arranged on the second metal connecting plate and is electrically connected to one end of the signal feeding line, in which the conductor is made by metallic materials with geometric configuration. 
         [0012]    According to the objectives above, the present invention provides a hinge antenna, which includes a metal hinge, a first metal connecting plate and a second metal connecting plate. One end of the first metal connecting plate and one end of the second metal connecting plate are connected to a metal joint plate respectively. The metal hinge jointed the first metal connecting plate and the second metal connecting plate through the metal joint plate. The metal hinge includes a metal shaft and the metal shaft is arranged in the metal joint plate. The first metal connecting plate and the second metal connecting plate are rotated by the metal shaft with respect to the metal hinge, the characteristic of the hinge antenna in that: a signal feeding line is provided for feeding an electromagnetic wave signal, a microwave substrate is arranged on the second metal connecting plate and having a signal feeding section and a grounding section. One end of the signal feeding section is electrically connected to one end of the signal feeding line and the grounding section is electrically connected to the second metal connecting plate. A conductor is arranged on the microwave substrate and is electrically connected to another end of the signal feeding second, in which the conductor is made by metallic materials with geometric configuration. 
         [0013]    According to the objectives above, the present invention further provides a foldable electronic device which includes at least a hinge antenna, a first housing and a second housing. The hinge antenna includes a metal hinge, a first metal connecting plate and a second metal connecting plate. One end of the first metal connecting plate and one end of the second metal connecting plate is connected to a metal joint plate. The metal hinge is connected to the first metal connecting plate and the second metal connecting plate through the metal joint plate respectively. The metal hinge further includes a metal shaft which is arranged in the metal joint plate and the first metal connecting plate and the second metal connecting plate are rotated by the metal shaft with respect to the metal hinge. The first housing and the second housing are fixed on the first metal connecting plate and the second metal connecting plate respectively such that the first housing and the second housing are rotationally displaced with respect to the metal shaft as the center, the characteristic of the hinge antenna in that: a signal feeding line is provided for feeding an electromagnetic wave signal and a conductor is arranged on the second metal connecting plate and is electrically connected to one end of the signal feeding line, in which the conductor is made by the metallic materials with geometric configuration. 
         [0014]    According to the objectives above, the present invention still provides a foldable electronic device, which includes at least a hinge antenna, a first housing and a second housing. The hinge antenna includes a metal hinge, a first metal connecting plate and a second metal connecting plate, and one end of the first metal connecting and one end of the second metal connecting plate is connected to a metal joint plate respectively. The metal hinge is jointed the first metal connecting plate and the second metal connecting plate through the metal joint plate. The metal hinge further includes a metal shaft which is arranged in the metal joint plate and the first metal connecting plate and the second metal connecting plate are rotated with respect to the metal hinge by the metal shaft. The first housing and the second housing are fixedly connected to the first metal connecting plate and the second metal connecting plate respectively, such that the first housing and the second housing are rotationally displaced with respect to the metal shaft as the center, the characteristic of the hinge antenna in that: a signal feeding line is provided for feeding an electromagnetic wave signal, a microwave substrate is arranged on the second metal connecting plate and having a signal feeding section and a grounding section. One end of the signal feeding section is electrically connected to one end of the signal feeding line and the grounding section is electrically connected to the second metal connecting plate. A conductor is arranged on the microwave substrate and is electrically connected to another end of the signal feeding section, and the conductor is made by the metallic materials with geometric configuration. 
         [0015]    With the hinge antenna and the foldable electronic device with the hinge antenna provided by the present invention, the effects of structure stabilization, assembly simplification and appearance unification can be achieved. Furthermore, the manufacturing process can be effectively shortened and the yield can be improved as a result. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]      FIG. 1  is a schematic view of a hinge antenna according to a first embodiment of the present invention. 
           [0017]      FIG. 2A  is another schematic view of the hinge antenna according to the first embodiment of the present invention. 
           [0018]      FIG. 2B  is a further schematic view of the hinge antenna according to a first embodiment of the present invention. 
           [0019]      FIG. 3  is a schematic view of a hinge antenna according to a second embodiment of the present invention. 
           [0020]      FIG. 4  is another schematic view of the hinge antenna according to the second embodiment of the present invention. 
           [0021]      FIG. 5A  is a schematic view showing the application of the first embodiment in a foldable electronic device according to the present invention. 
           [0022]      FIG. 5B  is another schematic view showing the application of the first embodiment in a foldable electronic device according to the present invention. 
           [0023]      FIG. 6  is a schematic view showing a conventional antenna structure. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0024]    The present invention major provides a hinge antenna and a foldable electronic device with a hinge antenna, the main technical means is that the conductor is extended directly and is connected to the hinge for assembling. The hinge and the conductor are configured to form an antenna structure and the hinge is electrically connected to the metallic housing of the electronic device, such that the radiation area of the whole antenna can be increased and the antenna performance can be improved. Thus, there is no need to additionally install a micro-scale antenna that may influence the quality of electromagnetic signal transmission and reception. As resulted, the effects of structure stabilization, assembly simplification and the shielding effect of metals can be suppressed. In addition, the present invention with the basic principles and functions of the antenna has knowledge of the relevant art who can understand clearly. In the following of the description, only for the characteristics of the hinge antenna and the foldable electronic device with the hinge antenna of the present invention to describe in detailed. Some sample embodiments of the invention will now be described in greater detail. Nevertheless, it should be recognized that the present invention can be practiced in a wide range of other embodiments besides those explicitly described, and the scope of the present invention is expressly not limited except as specified in the accompanying claims. 
         [0025]    First, please refer to  FIG. 1 .  FIG. 1  is a schematic view of a hinge antenna according to a first embodiment of the present invention. As shown in  FIG. 1 , the hinge antenna  1  includes a metal hinge  10 , a first metal connecting plate  12  and a second metal connecting plate  14 . One end of the first metal connecting plate  12  and one end of the second metal connecting plate  14  is connected to a metal joint plate  101  and a metal joint plate  101 ′ respectively. The metal hinge  10  is jointed the first metal connecting plate  12  through the metal joint plate  101  and metal hinge  10  is also jointed the second metal connecting plate  14  through the metal joint plate  101 ′. The metal hinge  10  further includes a metal shaft  102  which is arranged and penetrated within the metal joint plate  101  and the metal joint plate  101 ′, such that the first metal connecting plate  12  and the second metal connecting plate are rotated by the metal shaft  103  with respect to the metal hinge  10 . The metal shaft  10 , the metal joint plate  101 , the metal joint plate  101 ′ the first metal connecting plate  12  and the second metal connecting plate  14  are made by stamping the metallic materials. A plurality of through holes in the first metal connecting plate  12  and in the second metal connecting plate  14  is used for locking the outer housing (for example, the housing of the foldable electronic device). As aforementioned, the size or the configuration for the first metal connecting plate  12  and the second metal connecting plate  14  are not limited in the present invention. 
         [0026]    In addition, the hinge antenna  1  further includes a signal feeding line  142  which is provided for feeding an electromagnetic wave signal. The signal feeding line  142  is a coaxial cable. The hinge antenna  1  also includes a conductor  143  which is arranged on the second metal connecting plate  14  and is electrically connected to one end of the signal feeding line  142 . In one preferred embodiment of the present invention, the conductor  143  is made by a metallic material with geometric configuration. The conductor  143 , the first metal connecting plate  12  and the second metal connecting plate  14  are configured to form a planar inverted-F antenna. Please further refer to the explosive view of dotted line in  FIG. 1 . The conductor  143  further includes a connecting section  1431 , a signal feeding section  1432  and a radiation section  1433 . The conductor  143  is fixed on the second metal connecting plate directly and is connected to one end of the signal feeding line  142  through the signal feeding section  1432  and the conductor  143  received and transmitted the electromagnetic wave signal through the radiation section  1433  of an extension section of the signal feeding section  1432 . The conductor  143  can cooperate to the foldable electronic device to be combined, and the conductor  143  is extended vertically upward or downward along one side of the second metal connecting plate  14 . The conductor  143  can fix on the second metal connecting plate  14  by welding or the conductor  143  is integrated with the second metal connecting plate  14  but it would not be limited in the present invention. Furthermore, when the signal feeding line  142  is constructed by a coaxial cable which includes a pair and isolated inner conductor of the coaxial cable  1421  and an outside metal shield of the coaxial cable  1423  and an insulation shielding layer (not shown) covered outside of the coaxial cable. One end of the inner conductor of the coaxial cable  1421  of the signal feeding line  132  is electrically connected to the signal feeding section  1432  of the conductor  143  and the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  is electrically connected to the second metal connecting plate  14  (as for electrical connecting to the ground line). Because there is a distance “d” between the electrically connecting position of the inner conductor of the coaxial cable  1421  and that of the outside metal shield of the coaxial cable  1423 , the distance “d” can achieve the purpose for adjusting the impedance matching and can prevent the short circuit of the inner conductor of the coaxial cable  1421  from the radiation influence of the second metal connecting plate  14  for receiving and transmitting the electromagnetic wave signal. The distance “d” is range from 5 mm to 10 mm or a longer distance. Obviously, the metal shaft  10 , the metal joint plate  101 , the metal joint plate  101 ′, the first metal connecting plate  12  and the second metal connecting plate  14  are formed by stamping metallic plate. When the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  is connected to the second metal connecting plate  14  that means the components such as the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  is integrated with the metal hinge  10 , the metal joint plate  101 , the metal joint plate  101 ′ the first metal connecting plate  12  and the second metal connecting plate  14  which are used for connecting to the outer housing (such as the housing of the foldable electronic device) and are commonly grounded. 
         [0027]    According to aforementioned, the electromagnetic wave signal is received by the conductor  143  and is transmitted to the internal circuit (such as internal circuit within the foldable electronic device) through the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  or the electromagnetic wave signal is transmitted by the internal circuit (such as the internal circuit within the foldable electronic device) through the inner conductor of the coaxial cable  1421  of the signal feeding line  142  to the conductor  143  and then the electromagnetic wave signal is transmitted by the conductor  143 . The outside metal shield of the coaxial cable  1423  is integrated with and is electrically connected to the outer housing (such as the housing of the foldable electronic device), the metal hinge  10 , the metal joint plate  101 , the metal joint plate  101 ′, the first metal connecting plate  12  and the second metal connecting plate  14  and are commonly grounded. With above components, the antenna loop is formed. It is emphasized that the signal feeding section  1432  is electrically connected to the inner conductor of the coaxial cable  1421  directly in the present invention. Obviously, the work bandwidth of the antenna loop has been matched when the signal feeding line  142  is fed into the electromagnetic wave signal. Thus, the hinge antenna  1  can apply for one of the third-generation mobile communications (3G) systems, Bluetooth systems and wireless broadband (Wi-Fi) system. The size and the configuration of the conductor  143  are not to be limited herein and can adjust according to the work bandwidth of the electromagnetic wave. 
         [0028]    In addition, in order to insure the hinge antenna  1  that is fixedly connected to the foldable electronic device, a fixing plate  103  and an extension buckle  141  are alternatively arranged in the hinge antenna  1 . One side of the fixing plate  103  is connected to the metal hinge  10  and another side of the fixing plate  103  is fixedly connected to the housing of the foldable electronic device. The extension buckle  141  is arranged extendedly along one side of the second metal connecting plate  14 . In another preferred embodiment, the extension buckle  141  can cooperate to the foldable electronic device for combination that is extended vertically upward or downward to dispose along one side of the second metal connecting plate  14 . Moreover, the extension buckle  141  further includes a buckle hole  1411  that is used for engaging with the housing of the foldable electronic device. Therefore, with the design of the fixing plate  103  and the extension buckle  141 , the hinge antenna  1  can fixedly connect to the foldable electronic device. 
         [0029]    Next, please refer to  FIG. 2A .  FIG. 2A  is a schematic view of another hinge antenna according to the first embodiment of the present invention. The structure in  FIG. 2A  is similar to aforementioned structure in  FIG. 1  and thus it is not described herein. The different is that the conductor  143  is a planar inverted-F antenna or a loop antenna. The conductor  143  includes a connecting section  1431 , a signal feeding section  1432  and a radiation section  1433 . The connecting section  1431  is fixedly connected to the second metal connecting plate  14  and is connected to one end of the signal feeding line  142  through the signal feeding section  1432 . The conductor  143  is received and transmitted the electromagnetic wave signal from the radiation section  1433  that is extended from the signal feeding section  1432 . The conductor  143  can cooperate to the foldable electronic device for combination that is extended vertically upward or downward to dispose along one side of the second metal connecting plate  14 . The arrangement for the conductor  143  is not to be limited in the present invention. In addition, one end of the inner conductor of the coaxial cable  1421  of the signal feeding section  142  is electrically connected to the signal feeding section  1432  of the conductor  143  and the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  is electrically connected to the second metal connecting plate  14  (as for electrically connecting to the ground line). Because there is a distance “d” between the electrically connecting position of the inner conductor of the coaxial cable  1421  and that of the second metal connecting plate  14 , the distance “d” can achieve the purpose for adjusting the impedance matching and can prevent the short circuit of the inner conductor of the coaxial cable  1421  from the radiation influence of the second metal connecting plate  14  for receiving and transmitting the electromagnetic wave signal. The distance “d” is range from 5 mm to 10 mm or a longer distance. 
         [0030]    Please refer to  FIG. 2B .  FIG. 2B  is a further schematic view of the hinge antenna according to a first embodiment of the present invention. It is clearly to obtain the different between  FIG. 2A  and  FIG. 2B  is that the position of the signal feeding section  1432 . However, this is merely change in the position of the signal feeding section  1432  and the position of the signal feeding section  1432  is not limited herein. The signal feeding section  1432  is still arranged on the conductor  143  and is electrically connected to the signal feeding section  1432  of the conductor  143  through one end of the inner conductor of the coaxial cable  1421  of the signal feeding line  142  and the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  is electrically connected to the second metal connecting plate  14  (as for electrically connecting to the ground line). Because there is a distance “d” between the electrically connecting position of the inner conductor of the coaxial cable  1421  of the signal feeding line  142  and that of the second metal connecting plate  14 , the distance “d” can achieve the purpose for adjusting the impedance matching and can prevent the short circuit of the inner conductor of the coaxial cable  1421  from the radiation influence of the second metal connecting plate  14  for receiving and transmitting the electromagnetic wave signal. The distance “d” is range from 5 mm to 10 mm or a longer distance. 
         [0031]    Next, please refer to  FIG. 3 .  FIG. 3  is a schematic view of a hinge antenna according to a second embodiment of the present invention. As shown in  FIG. 3 , a hinge antenna  2  includes a metal hinge  20 , a first metal connecting plate  22  and a second metal connecting plate  24 . One end of the first metal connecting plate  22  and one end of the second metal connecting plate  24  is connected to a metal joint plate  201  and a metal joint plate  201 ′ respectively. The metal hinge  20  is jointed the first metal connecting plate  22  through the metal joint plate  201  and the metal hinge  20  is jointed the second metal connecting plate through the metal joint plate  201 ′. The metal hinge  201 ′ further includes a metal shaft  202  and the metal shaft  202  is penetrated through the metal joint plate  201  and the metal joint plate  201 ′ such that the first metal connecting plate  22  and the second metal connecting plate  24  are rotated by the metal shaft  202  with respect to the metal hinge  20 . Above metal hinge  20 , the first metal connecting plate  22 , the metal joint plate  201 , the metal joint plate  201 ′ and the second metal connecting plate  24  are formed by stamping the metallic materials. A plurality of through holes (not shown) in the first metal connecting plate  22  and the second metal connecting plate  24  is used for locking with the outer housing (such as housing of the foldable electronic device). Similarly, the size and the configuration of the first metal connecting plate  22  and the second metal connecting plate  24  are not limited in the embodiment of the present invention. 
         [0032]    In addition, hinge antenna  2  further includes a signal feeding line  240 , a microwave substrate  242  and a conductor  243 , in which the signal feeding line  240  is provided for feeding an electromagnetic wave signal, the microwave substrate  242  is fixed to the second metal connecting plate  24  but the fixing manner is not limited herein. The microwave substrate  242  further includes a signal feeding section  2421  and a grounding section  2422 , in which one end of the signal feeding section  2421  is electrically connected to one end of the signal feeding line  240  and the grounding section  2422  is electrically connected to the second metal connecting plate  24 . The conductor  243  is arranged on the microwave substrate  242  and is electrically connected to another end of the signal feeding section  2421 . In one preferred embodiment of the present invention, the microwave substrate  242  can be a printed circuit board (PCB) and the signal feeding section  2421  on the PCB is a signal pad sp as to selectively form a matching circuit. The matching circuit is a LC circuit which is constructed by an inductor and a capacitor. Thus, with the design of the impedance of the LC circuit to achieve the selection or adjustment of the electromagnetic wave signal which is matched. Further, the conductor  243  is formed by metallic material with geometric configuration. The conductor  243 , the metal hinge  20 , a first metal connecting plate  22  and a second metal connecting plate  24  are configured to form a monopole antenna. The conductor  243  further includes a connecting section  2431  and a radiation section  2432 , in which the conductor  243  is electrically connected to one end of the signal feeding section  2421  on the microwave substrate  242  through the connecting section  2431  and is arranged and extended outwardly. The conductor  243  is received and transmitted the electromagnetic wave signal through the radiation section  2432 . In one preferred embodiment, the conductor  243  can cooperate to a foldable electronic device for combination and the conductor  243  is extended vertically upward or downward along one side of the microwave substrate  242 . The conductor  243  is fixed on the microwave substrate  242  by welding or is directly integrated with the microwave substrate  242 . It is not limited in the present invention. Moreover, when the signal feeding line  240  is a coaxial cable, the coaxial cable is constructed by a pair of an inner conductor of the coaxial cable  2401  that is isolated from an outside metal shield of the coaxial cable  2403  and an insulated shielding layer (not shown in  FIG. 3 ) covered outside of the coaxial cable. The inner conductor of the coaxial cable  2401  of the signal feeding line  240  is electrically connected to a signal feeding section  2421  of the conductor  243  and the outside metal shield of the coaxial cable  2403  of the signal feeding line  240  is electrically connected to the microwave  242  (as for electrically connecting to the ground line) through a fixing pad  2404  to prevent the short circuit of the inner conductor of the coaxial cable  2401  from the radiation influence is introduced by the microwave substrate  242  for receiving or transmitting the electromagnetic wave signal. Obviously, when the outside metal shield of the coaxial cable  2403  of the signal feeding line  240  is electrically connected to the microwave substrate  242  through the fixing pad  2404 , the outside metal shield of the coaxial cable  2403  of the signal feeding line  240 , the metal hinge  20 , the metal joint plate  201 , the metal joint plate  201 ′, the first metal connecting plate  22  and the second metal connecting plate  24  are integrated with an outer housing (such as housing of the foldable electronic device) and are commonly grounded when the metal hinge  20 , the metal joint plate  201 , the metal joint plate  201 ′, the first metal connecting plate  22  and the second metal connecting plate  24  are formed by stamping the metallic materials. 
         [0033]    According to aforementioned, after adjusting the work bandwidth of the electromagnetic wave signal with the matching circuit, the electromagnetic wave signal is fed into the inner conductor of the coaxial cable  2401  of the signal feeding line  240  and then is transmitted into the internal circuit (such as an internal circuit within the foldable electronic device) or the inner conductor of the coaxial cable  2401  of the signal feeding line  240  transmits the electromagnetic wave signal that is further adjusted by the matching circuit to the conductor  243 . The outside metal shield of the coaxial cable  2403  is integrated with the components of the outer housing (such as the housing of the foldable electronic device) and are commonly grounded, in which the components such as metal shaft  20 , the metal joint plate  201 , the metal joint plate  201 ′, the first metal connecting plate  22  and the second metal connecting plate  24 . Thus, with the above components to constructs an antenna loop. It is emphasized that the matching circuit is used for adjusting the work bandwidth. Thus, the hinge antenna  2  can apply for one of the third-generation mobile communications (3G) systems, Bluetooth systems and wireless broadband (Wi-Fi) system. The size and the configuration of the conductor  243  are not to be limited herein and can adjust according to the work bandwidth of the electromagnetic wave. 
         [0034]    In addition, in order to insure the hinge antenna  2  that is fixedly connect to the foldable electronic device, a fixing plate  203  and an extension buckle  241  are arranged in the hinge antenna. One side of the fixing plate  203  is connected to the metal hinge  20  and another side of the fixing plate  203  is fixedly connected to the housing of the foldable electronic device. The extension buckle  241  is arranged extendedly along one side of the second metal connecting plate  24 . In one preferred embodiment, the extension buckle  241  can cooperate to the foldable electronic device for combination, which is extended vertically upward or downward along one side of the second metal connecting plate  24 . In addition, the extension buckle  241  further includes a buckle hole  2411  which is provided for engaging with the foldable electronic device. With the design of the hinge antenna fixedly connected to the fixing plate  203  and the extension buckle  241 , the hinge antenna  2  is more fixedly connected to the foldable electronic device. 
         [0035]    Please refer to  FIG. 4 .  FIG. 4  is another schematic view of the hinge antenna according to the second embodiment of the present invention. The structure in  FIG. 4  is similar to aforementioned structure in  FIG. 3  and it is not described herein. The different is that the conductor  243  is a planar inverted-F antenna or a loop antenna. The conductor  243  also includes a connecting section  2431  and a radiation section  2432 , in which the conductor  243  is electrically connected to one end of the signal feeding section  2421  on the microwave substrate  242  through the connecting section  2431  and the conductor  243  is arranged extendedly outward. The conductor  243  received and transmitted the electromagnetic wave signal through the radiation section  2432  and the desired electromagnetic wave signal is adjusted or selected by the matching circuit. In one preferred embodiment, the conductor  243  can cooperate to a foldable electronic device for combination, the conductor  243  is extended vertically upward or downward along one side of the microwave substrate  242  and it is not limited in this embodiment. In addition, the inner conductor of the coaxial cable  2401  of the signal feeding line  240  is electrically connected to the signal feeding section  2421  of the conductor  243 . The outside metal shield of the coaxial cable  2403  of the signal feeding line  240  is connected to the microwave substrate  242  through the fixing pad  2404  (as for electrically connecting to the ground line) to prevent the short circuit of the inner conductor of the coaxial cable  2401  from the radiation influence is introduced by the microwave substrate  242  for receiving or transmitting the electromagnetic wave signal. 
         [0036]    Then, please refer to  FIG. 5A .  FIG. 5A  is a schematic view showing the application of the first embodiment in a foldable electronic device according to the present invention. As shown in  FIG. 5A , the foldable electronic device  3  includes at least a hinge means  301 , a first housing  30  and a second housing  32 , in which the first housing  30  is integrated with the second housing  32  through the hinge means  301 , such that the first housing  30  and the second housing  32  are rotationally displacement with respect to the hinge means  301  as the center. In one embodiment of the present invention, the foldable electronic device  3  is a laptop and the first housing  30  is a housing for accommodating the display of the laptop and the second housing  32  is a hosing for accommodating the keyboard and the motherboard of the laptop. The feature of the present invention is that a metallic block antenna integrated with the hinge means  301  to construct a hinge antenna  1  such that the hinge antenna  1  combined with the hinge means  301  can provide a function of torque which is required for the rotation of the first housing  30  and the second housing  32  and is capable of the antenna function. The structure of the hinge antenna  1  is combined with above hinge means  301  that is similar to the first embodiment of the hinge antenna  1  (as shown in  FIG. 1 ) and it is not described herein. 
         [0037]    When the hinge antenna  1  (as shown in  FIG. 1 ) of the first embodiment is arranged on the foldable electronic device  3 , the hinge means  301  is replaced with the metal hinge  10  and the metal hinge  10  is connected to the first metal connecting plate  12  and the second metal connecting plate  14  in the hinge antenna  1  and the fixing plate  103  connected to the metal hinge  10  which is connected to the first housing  30  or the second housing  32 . It should be expressed that the connection manner between the first metal connecting plate  12 , the second metal connecting plate  14  and the first housing  30  and the second housing of the foldable electronic device  3  is not limited and the connection manner can be adjusted according to the design of the foldable electronic device  3 . For example, when the second metal connecting plate  14  is fixedly connected to the first housing  30 , the conductor  143  of the hinge antenna  1  is to be arranged on one side of the first housing  30 . When the second metal connecting plate  14  is fixedly connected to the second housing  32 , the conductor  143  of the hinge antenna  1  is arranged on one side of the second housing  30 . In order to insure the hinge antenna  1  that is fixedly connected to the foldable electronic device, the present invention selectively provides an extension buckle  141  that is arranged and is extended vertically upward or downward along one side of the second metal connecting plate  14 . In addition, there is a buckle hole  1411  is arranged on the extension buckle  141  which is provided for engaging with the housing of the foldable electronic device such that the hinge antenna  1  is more fixedly connected to the foldable electronic device. 
         [0038]    In addition, the material of the first housing  30  or that of the second housing  32  are not limited in the present invention, and thus the material can select all of the metallic housing; alternatively, one is metallic housing and another one is non-metallic housing. For the conductor  143  is capable of receiving and transmitting electromagnetic wave signal, the area relative to one side of the conductor  143  requires the non-metallic materials to avoid the shielding effect to create the shielding effect to cause the reception and the transmission of electromagnetic wave signal of the conductor  143  cannot be achieved. In addition, when more than one pair of the hinge means  301  on the foldable electronic device, the hinge antenna  1  of the present invention can selectively arrange on one of the hinge means  301  and it is also not to be limited. 
         [0039]    In addition, the metal hinge  10 , the metal joint plate  101 , the metal joint plate  101 ′, the first metal connecting plate  12  and the second metal connecting plate  14  of the hinge antenna  1  of this embodiment are made by stamping the metallic plate. Thus, when the first metal connecting plate  12  or the second metal connecting plate  14  is connected to the first housing  30  or the second housing  32  and the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  is connected to the second metal connecting plate  14  which means the outside metal shield of the coaxial cable  1423  of the signal feeding line  142  is integrated with the metal hinge  10 , the metal joint plate  101 , the metal joint plate  101 ′, the first metal connecting plate  12 , the second metal connecting plate  14 , the first housing  30  or the second housing and are commonly grounded. It is emphasized that one end of the conductor  143  is electrically connected to one end of the signal feeding line  142  directly in the foldable electronic device  3  of the present invention. Obviously, the work bandwidth for the antenna loop has been matched when the electromagnetic wave signal is fed into the signal feeding line  142 . Thus, the hinge antenna  1  can apply for one of the third-generation mobile communications (3G) systems, Bluetooth systems and wireless broadband (Wi-Fi) system. The size and the configuration of the conductor  143  are not to be limited herein and can adjust according to the work bandwidth of the electromagnetic wave. 
         [0040]    Because the conductor  143  can arrange extendedly on the second metal connecting plate  14  and the conductor  143 , the metal hinge  10 , the first metal connecting plate  12  and the second metal connecting plate  14  to construct a planar inverted-F antenna design and thus, there is no need to additionally install a micro-scale antenna that may influence the quality of electromagnetic signal transmission and reception. As resulted, the effects of structure stabilization, assembly simplification and appearance unification can be achieved. 
         [0041]    Please refer to  FIG. 5B . is another schematic view showing the application of the first embodiment in a foldable electronic device according to the present invention. It is obviously to obtain that the different is to reduce the design for connecting the fixing plate and extension buckle to the foldable electronic device and to change the configuration of the conductor  143  and the position of the signal feeding line  1432 . Herein, this embodiment is merely cooperated with the foldable electronic device to be changed for combination, and the signal feeding section  1432  is still arranged on the conductor  143  and is electrically connected to one end of the signal feeding line  142  and by changing the distance “d” to achieve the purpose of the impedance matching. It is expressed that the size and configuration of the conductor  143  are not limited and the position of the signal feeding section  1432  is also not limited. The connections for the first metal connecting plate, the second metal connecting plate and the conductor are not limited, and the construction of the foldable electronic device is similar to above  FIG. 5A  and it is not to be described. 
         [0042]    The conductor  243  can arranged extendedly on the microwave substrate  242  and the conductor  243 , the metal hinge  10 , the first metal connecting plate  12  and the second metal connecting plate  14  are configured to form a planer inverted-F antenna and there is no need to additionally install a micro-scale antenna that may influence the quality of electromagnetic signal transmission and reception. As resulted, the effects of structure stabilization, assembly simplification and appearance unification can be achieved. 
         [0043]    In addition, the hinge antenna  1  of the first embodiment is arranged within the foldable electronic device  3  and is cooperated to the construction of the foldable electronic device for combination to selectively adjust the connection design of the foldable electronic device. It is emphasized that there in not limit to the hinge antenna  1  arrange in the foldable electronic device and the hinge antenna  2  of the second embodiment can also arrange in the foldable electronic device  3  and according to the combination of the foldable electronic device for selectively adjusting the connection design of the foldable electronic device. 
         [0044]    Although the present invention has been described with reference to the preferred embodiment thereof, it is apparent to those skilled in the art that a variety of modifications and changes may be made without departing from the scope of the present invention which is intended to be defined by the appended claims.