Abstract:
The present invention provides a coaxial RF cable connection device that connects a coaxial RF cable to a printed circuit board having one side on which a signal transmission pattern is formed and having another side on which a ground plane is formed. The devices has central body with a support opening into which the cable is penetrated and inserted and a solder block with a pair of auxiliary bodies respectively protruded from both sides of the central body. The printed circuit board has a cutting portion formed by cutting and removing a part of the edge. A pair of through holes are formed on both sides of the cutting portion and is soldered on one side of the printed circuit board.

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application is a U.S. national phase application, pursuant to 35 U.S.C. §371, of PCT/KR2012/001984, filed Mar. 20, 2012, designating the United States, which claims priority to Korean Application No. 10-2011-0026616, filed Mar. 24, 2011. The entire contents of the aforementioned patent applications are incorporated herein by this reference. 
     TECHNICAL FIELD 
     The present invention relates to a cable connection device for electrically and mechanically connecting a coaxial RF cable to a printed circuit board of a communication system. 
     BACKGROUND ART 
     Generally, in a communication system, various electronic elements are mounted on a high-frequency printed circuit board, and a coaxial RF cable is used to transmit and receive signals to/from the electronic elements. Such a coaxial RF cable is a transmission medium for transmitting and receiving signals, in which an internal conductor is enclosed by an internal insulation made of a dielectric substance, the internal insulation is enclosed by an external conductor, and the external conductor is enclosed by an outer peripheral insulation substance. 
     The coaxial RF cable has been widely used for the communication system because it has been subjected to a less electrical interference and has a loss of electric power. Accordingly, there is need for a connection device for electrically and mechanically connecting the coaxial cable to a ground of a high-frequency printed circuit board. 
     A conventional coaxial RF cable connection device is disclosed in Korean Patent Application No. 2005-110003 in detail. 
     However, there is a disadvantage in that the connection device disclosed in Korean Patent Application Serial No. 2005-110003 has a high manufacturing cost. That is, in the conventional connection device, there are problems in that a manufacturing cost is high and a manufacturing method is complicated. 
     Especially, in connection of two or more coaxial RF cables to a high-frequency printed circuit board, two connection devices which are independently manufactured are used. Therefore, a material cost increases two times, and a connection process become more complicated two or more times, resulting in an increase of a manufacturing cost. 
     Accordingly, there has been an increasing need for reducing a cost of a device for connecting two or more parallel arranged RF cables to the high-frequency printed circuit board. 
     SUMMARY OF THE DISCLOSURE 
     Accordingly, the present invention has been made to solve the above-mentioned problems in the conventional art, and an aspect of the present invention is to provide a coaxial RF connection device which is easily manufactured and of which a manufacturing cost is cheap. 
     Further, another aspect of the present invention is to provide a coaxial RF cable connection device in which a manufacturing cost can be reduced when a single coaxial RF cable is connected to a printed circuit board, or two or more coaxial RF cables are connected to the printed circuit board. 
     Furthermore, still another aspect of the present invention is to provide a coaxial RF cable connection device in which parts can be freely designed and easily changed in shape by pressing or etching a brass plate. 
     In addition, still another aspect of the present invention is to provide a coaxial RF cable connection device which can be advantageous in miniaturization and lightweight. 
     In order to solve the technical problems, there is provided a cable connection device for connecting a coaxial RF cable to a printed circuit board which has a signal transmission pattern on one surface thereof and a ground on the other surface thereof. The cable connection device includes: a central body having a supporting opening in which the coaxial RF cable is inserted; and a solder block which includes a pair of auxiliary bodies extending from both sides of the central bodies and being stepped in a protruding shape, wherein the printed circuit board has a cutout portion where an edge of the printed circuit board is cutout and removed, and a pair of thru-holes is formed at both sides of the cutout portion, wherein the solder block is soldered to one surface and/or the other surface of the printed circuit board so that the central bodies and the auxiliary bodies extend through and are inserted in the cutout portion and the thru-holes, and wherein at least one central body and cutout portion are provided, and at least one pair of auxiliary body and thru-hole are formed. 
     As described above, the connection device according to the present invention is miniaturized and lightweight and has a simple structure, resulting in a significant reduction of a manufacturing cost. Especially, the connection device according to the present invention is manufactured by pressing or etching the brass plate, thereby reducing the manufacturing cost, allowing the parts to be freely designed, and allowing a shape to be easily changed. 
     Further, according to the present invention, the two or more coaxial RF cables are simply connected to a ground, thereby contributing to a reduction of the manufacturing cost. Also, a connection process is simple, thereby reducing a manufacturing cost of a product. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which: 
         FIG. 1  is an exploded perspective view illustrating a structure of a connection device according to a first embodiment of the present invention. 
         FIG. 2  is a front view illustrating a solder block employed to the connection device according to the first embodiment of the present invention. 
         FIG. 3  is a plan view illustrating the connection device according to the first embodiment of the present invention. 
         FIG. 4  is a bottom view illustrating the connection device according to the first embodiment of the present invention. 
         FIG. 5  is a front view illustrating a solder block employed to a connection device according to a second embodiment of the present invention. 
         FIG. 6  is a plan view illustrating the connection device according to the second embodiment of the present invention. 
         FIG. 7  is a front view illustrating a solder block employed to a connection device according to a third embodiment of the present invention. 
         FIG. 8  is a plan view illustrating the connection device according to the third embodiment of the present invention. 
         FIG. 9  is a front view illustrating a solder block employed to a connection device according to a fourth embodiment of the present invention. 
         FIG. 10  is a plan view illustrating the connection device according to the fourth embodiment of the present invention. 
         FIG. 11  is an exploded perspective view illustrating a structure of a connection device according to a fifth embodiment of the present invention. 
         FIG. 12  is a front view illustrating a solder block employed to a connection device according to a fifth embodiment of the present invention. 
         FIG. 13  is a plan view illustrating the connection device according to the fifth embodiment of the present invention. 
         FIG. 14  is a front view illustrating a solder block employed to a connection device according to a sixth embodiment of the present invention. 
         FIG. 15  is a plan view illustrating the connection device according to the sixth embodiment of the present invention. 
         FIG. 16  is a front view illustrating a solder block employed to a connection device according to a seventh embodiment of the present invention. 
         FIG. 17  is a plan view illustrating the connection device according to the seventh embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, a structure of an RF cable connection device according to the present invention will be described with reference to the accompanying drawings. An identical reference numeral denotes the same structural element. 
     The structure of a coaxial RF cable connection device (hereinafter, referred to as a connection device) according to a first embodiment of the present invention will be described with reference to  FIGS. 1 to 4 . 
     As shown in  FIGS. 1 to 4 , the connection device is one for electrically and mechanically connecting the coaxial RF cable C to a ground  13  and/or a signal transmission pattern  12  of a printed circuit board  10  employed to a communication system, and means a device for use in a stable transmission of signals without Passive Intermodulation Distortion (PIMD). 
     The connection device includes the printed circuit board  10  and a solder block  20 . The printed circuit board  10  has a signal transmission pattern  12  at one surface  10   a  thereof and a ground  13  at the other surface  10   b  thereof. The printed circuit board  10  includes a cutout portion  14  in which apart of an edge is cut out, and a pair of thru-holes  16  and  18  formed at both sides of the cutout portion  14 . The cutout portion  14  is formed at a predetermined position of a periphery of the printed circuit board  10  and is an opening which opens outwardly, and the thru-holes  16  and  18  are closed openings with a circular shape. The cutout portion  14  means a space in which a central body  21  of the solder block, which is described later, and the coaxial RF cable C are disposed and soldered, and the thru-holes mean spaces in which auxiliary bodies  22  and  23  of the solder block  20  described later are inserted and soldered. The thru-holes  16  and  18  are paired to include two openings, and the thru-holes  16  and  18  are symmetrically disposed around the cutout portion  14  and opposite to each other. 
     The coaxial RF cable C includes a central line g 1 , and a grounding coating g 2  for providing the central line g 1  with a grounding force. The grounding coating g 2  surrounds and protects the central line g 1 , and contributes to a connection of the central line g 1  to the signal transmission pattern  12  prepared to the one surface  10   a  of the printed circuit board and/or the ground surface  13  prepared to the other surface  10   b  of the printed circuit board. Accordingly, the solder block  20  described later electrically connects the central line g 1  and the grounding coating g 2  of the coaxial RF cable to the signal transmission pattern  12  and/or the ground  13  (shown in  FIG. 4 ) of the printed circuit board by soldering. 
     As shown in  FIGS. 1 and 2 , the solder block  20  is a connection terminal which moves from a downward direction to an upward direction around the printed circuit board  10  and is inserted into the cutout portion  14  and the thru-holes  16  and  18  before being soldered to the signal transmission pattern  12  and/or the ground  13  of the printed circuit board, and includes a central body  21  and a pair of auxiliary bodies  22  and  23 . The central body  21  has a shape of protruding upwardly and is disposed to extend through the cutout portion  14 , which has a supporting opening  24  in which the coaxial RF cable C is inserted. The supporting opening  24  has a diameter large enough to allow the coaxial RF cable C to be inserted in. The auxiliary bodies  22  and  23  have at least one pair which are stepped and extend upwardly from both sides of the central body  21 , and penetrate the thru-holes  16  and  18 , respectively. Further, the central body  21  extends upwardly rather than the auxiliary bodies  22  and  23 . The reason is because the solder block  20  has the opening  24  for supporting the coaxial RF cable C so that the coaxial RF cable C contacts the signal transmission pattern  12  of the printed circuit board. 
     The central body  21  and the auxiliary bodies  22  and  23  have a stepped portion d 1  therebetween, and the stepped portion d 1  has a depth in which the center line g 1  of the coaxial RF cable extending through the opening  24  for supporting the central body which protrudes through the cutout portion  14  comes in contact with the signal transmission pattern  12  of the printed circuit board. Further, the central body  21  and the auxiliary bodies  22  and  23  are integrally manufactured, and have a curved upper end to be easily inserted into the cutout portion  14  and the thru-holes  16  and  18 . 
     The stepped portion d 1  between the central body  20  and the auxiliary body has a depth in which a sectional surface of the grounding coating g 2  coated on a peripheral surface of the center line of the coaxial RF cable which extends through the opening  24  for supporting the central body protruding through the cutout portion  14  comes in contact with a surface  15  of the cutout portion in an insertion direction of the coaxial RF cable. In other words, when the solder block  20  is inserted into the cutout portion  14 , and the coaxial RF cable C comes in close contact with the supporting opening  24 , the sectional surface of the grounding coating g 2  keeps in contact with and is latched by the surface  15  of the cutout portion. Accordingly, it is possible to block a movement of the coaxial RF cable C in the insertion direction. In this state, a soldering process is performed. 
     As described above, a structure in which the coaxial RF cable C keeps in close contact with the cutout portion  14  and the opening  24  for supporting the solder block  20  which is inserted into the thru-holes  16  and  18  will be identically applied to a construction in which the solder block and the coaxial RF cable of the connection device to be described below in various embodiments are arranged. 
     Further, the solder block  20  may be manufactured by pressing or etching a brass plate in a predetermined shape. Since the solder block  20  is manufactured in this process, it is possible to freely design parts and to easily change a shape. 
     When the solder block  20  having the above-mentioned structure is inserted in the cutout portion  14  and the thru-holes  16  and  18  of the printed circuit board  10 , and then the coaxial RF cable C is soldered to the solder block  20  in a state that the coaxial RF cable C is inserted into the supporting opening  24 , the central line g 1  of the coaxial RF cable extending through the supporting opening  23  comes in contact with the signal transmission pattern  12 , and the upper ends of the auxiliary bodies  22  and  23  extending through the thru-holes  16  and  18  protrude over and are fixed to the printed circuit board  10  by soldering. In addition, the connection device has a structure in that the central body  21  firstly supports the coaxial RF cable C and the auxiliary bodies  22  and  23  supports the central body  21 . Therefore, the coaxial RF cable C comes in stable contact with the signal transmission pattern  12 . When the solder block  20  is soldered, the solder block  20  keeps in contact with the signal transmission pattern  12  and/or the ground  13 . 
     The connection device is preferably soldered to the printed circuit board at positions where the coaxial RF cable central line g 1  is adjacent to or in contact with the signal transmission pattern  12 , and the auxiliary bodies  22  and  23  are inserted into the thru-holes  16  and  18  respectively, in order to keep a stability of a connection state. 
     Reference symbols S shown in  FIGS. 3 and 4  denote soldered portions. 
     A structure of the connection device according to the second embodiment of the present invention will be described with reference to  FIGS. 5 and 6 . As shown in  FIGS. 5 and 6 , the connection device according to the second embodiment of the present invention includes two openings  44  and  45  for supporting two coaxial RF cables C 1  and C 2 , in comparison with the connection device shown in  FIG. 1 . The structure of the connection device will be described with reference to  FIGS. 5 and 6 . 
     The connection device includes the printed circuit board  30  and a solder block  40 . The printed circuit board  30  includes first and second signal transmission patterns  31  and  32  on one surface  30   a  thereof, first and second grounds (not shown) on the other surface thereof, a cutout portion  34 , and a pair of thru-holes  36  and  38  formed at both sides of the cutout portion  34 . The cutout portion  34  means a space in which a central body  41  of the solder block  40 , which is described later, and the first and second coaxial RF cables C 1  and C 2  are disposed and soldered, and the thru-holes  36  and  38  mean spaces in which auxiliary bodies  42  and  43  of the solder block  40  described later are inserted and soldered. The thru-holes  36  and  38  are paired to include two openings, and the thru-holes  16  and  18  are symmetrically disposed around the cutout portion  34  and opposite to each other. 
     The solder block  40  includes a central body  41  and auxiliary bodies  42  and  43 , and is a terminal which moves from a bottom surface to an upper surface of the printed circuit board  30  and extends through the cutout portion  34  and the thru-holes  36  and  38 , so as to be soldered to the printed circuit board. The central body  41  of the solder block  40  has first and second supporting openings  44  and  45  in which the first and second coaxial RF cables C 1  and C 2  are inserted and which have a circular shape. The first and second supporting openings  44  and  45  have an identical shape, and are formed in parallel in the central body  41 . 
     The auxiliary bodies  42  and  43  protrude upwardly from both sides of the central body  41 , and extend through the thru-holes  36  and  38 , respectively. Further, the central body  41  extends upwardly rather than the auxiliary bodies  42  and  43 . The reason is because the central body  41  has the first and second supporting openings  44  and  45  in order that the central lines of the first and second coaxial RF cables C 1  and C 2  are disposed on the first and second signal transmission patterns  31  and  32 , respectively. Further, the central body  41  and the auxiliary bodies  42  and  43  are integrally manufactured, and have curved upper ends thereof to be easily inserted into the cutout portion  34  and the thru-holes  36  and  38 . Further, the solder block  40  may be manufactured by pressing or etching a brass plate in a predetermined shape. Since the solder block  40  is manufactured in this process, it is possible to freely design parts and to easily change a shape. When the solder block  40  constructed as described above is inserted into the cutout portion  34  and the auxiliary openings  36  and  38  of the printed circuit board, and then the central lines of the first and second RF cables C 1  and C 2  are in contact with the first and second signal patterns  31  and  32 , the central body  41  firstly supports the solder block  40 , and the auxiliary bodies  42  and  43  secondly support the central body  41 . The solder block  40  having the structure as described above keeps in contact with the first and second signal transmission patterns  31  and  32  and/or the first and second grounds (not shown). 
     Reference symbols S shown in  FIG. 6  denote soldered portions. 
     A structure of the connection device according to the third embodiment of the present invention will be described with reference to  FIGS. 7 and 8 . As shown in  FIGS. 7 and 8 , the connection device according to the third embodiment of the present invention has two identical solder blocks integrally formed, in comparison with the connection device shown in  FIG. 1 . The structure of the connection device will be described with reference to  FIGS. 7 and 8 . 
     The connection device includes the printed circuit board  50  and a solder block  60 . The printed circuit board  50  includes first and second patterns  51  and  52  on one surface  50   a  thereof, first and second grounds on the other surface thereof, first and second cutout portions  53  and  54 , and two pairs of first and second thru-holes  55 ,  56 ,  57  and  58  which are formed at both sides of the first and second cutout portions  53  and  54 . The first and second cutout portions  53  and  54  mean spaces in which first and second central bodies  61  and  65  of the solder block  60 , which is described later, and the first and second coaxial RF cables C 1  and C 2  are inserted and soldered, and the first and second thru-holes  55 ,  56 ,  57  and  58  mean spaces in which first and second auxiliary bodies  62 ,  63 ,  66  and  67  of the solder block described later are inserted and soldered, respectively. 
     The solder block  60  is a terminal which moves from a bottom surface to an upper surface of the printed circuit board  50  and is inserted into the first and second cutout portions  53  and  54 , and the first and second thru-holes  55 ,  56 ,  57  and  58  so as to be soldered to the first and second signal transmission patterns  51  and  52 , and which stably connects the central line of the coaxial RF cables C 1  and C 2  to the first and second signal transmission patterns  51  and  52 . The solder block  60  includes the first and second central bodies  61  and  65 , and two pairs of first and second auxiliary bodies  62 ,  63 ,  66  and  67 . The first and second central bodies  61  and  65  have an upwardly protruding shape and extend through the first and second cutout portions  53  and  54 . The first and second central bodies  61  and  65  include first and second supporting opening  64  and  68  in which the first and second axial RF cables C 1  and C 2  are inserted. The first and second supporting openings  64  and  68  have an identical shape, and are formed at a distance in the first and second central bodies  61  and  65 . 
     The first and second auxiliary bodies  62 ,  63 ,  66  and  67  are formed at both sides of each of the first and second bodies  61  and  65  in an upwardly protruding shape, and extend through the first and second thru-holes  55 ,  56 ,  57  and  58 , respectively. Further, the first and second central bodies  61  and  65  extend upwardly rather than the auxiliary bodies  62 ,  63 ,  66  and  67 . The first and second central bodies  61  and  65  and the first and second auxiliary bodies  62 ,  63 ,  66  and  67  are integrally manufactured. Further, the solder block  60  may be manufactured by pressing or etching a brass plate in a predetermined shape. Since the solder block  60  is manufactured in this process, it is possible to freely design parts and to easily change a shape. 
     When the solder block  60  having the structure as described above is inserted in the first and second cutout portions  53  and  54 , and the first and second thru-holes  55 ,  56 ,  57  and  58  of the printed circuit board, and the central lines of the first and second coaxial RF cables C 1  and C 2  are connected to the first and second signal transmission patterns  51  and  52  by soldering, the first and second coaxial RF cables C 1  and C 2  extending through the first and second supporting openings  64  and  68  are rigidly connected to the first and second signal transmission patterns  51  and  52  disposed on the printed circuit board  50 , and upper portions of the first and second auxiliary bodies  62 ,  63 ,  66  and  67  extending through the first and second thru-holes protrude over and are fixed to the printed circuit board  50  by soldering. That is, the connection device has a structure in that the first and second bodies  61  and  65  firstly support the first and second coaxial RF cables C 1  and C 2 , and the first and second auxiliary bodies  62 ,  63 ,  66  and  67  secondly support the first and second central bodies  61  and  65 . Therefore, the connection device stably connects the first and second coaxial RF cables C 1  and C 2  to the first and second grounds  51  and  52 . 
     Preferably, the connection device is soldered to the printed circuit board at positions where the central line of the first and second coaxial RF cables C 1  and C 2  are adjacent to the first and second patterns  51  and  52 , respectively, and where the first and second auxiliary bodies are inserted in the first and second thru-holes  55 ,  56 ,  57  and  58 , in order to maintain a stability of a connection state. In the structure as described above, the solder block  60  keeps in contact with the first and second signal transmission patterns  51  and  52  and/or the first and second grounds (not shown). 
     Reference symbols S shown in  FIG. 8  denote soldered portions. 
     A structure of the connection device according to the fourth embodiment of the present invention will be described with reference to  FIGS. 9 and 10 . As shown in  FIGS. 9 and 10 , the solder block  80  employed to the connection device according to the fourth embodiment of the present invention has a mixed shape of the solder block  40  shown in  FIG. 5  and the solder block  60  shown in  FIG. 7 . 
     The connection device includes the printed circuit board  70  and a solder block  80 . The printed circuit board  70  includes first, second, third and fourth signal transmission patterns  70   a ,  70   b ,  70   c  and  70   d  on one surface  70 A thereof, first, second and third cutout portions  71 ,  72  and  73 , and two pairs of first and second thru-holes  74 ,  75 ,  76 , and  77  formed at both sides of the first and third cutout portions  71  and  73 . The first, second and third cutout portions  71 ,  72  and  73  mean spaces in which first, second and third central bodies  81 ,  82  and  83  of the solder block, which is described later, and the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  are inserted and soldered, and the first and second thru-holes  74 ,  75 ,  76  and  77  mean spaces in which auxiliary bodies  84 ,  85 ,  86  and  87  of the solder block described later are inserted and soldered, respectively. The first and second thru-holes  74 ,  75 ,  76  and  77  are paired to include two openings. 
     The solder block  80  includes first, second and third central bodies and first and second thru-holes, and moves from a bottom surface to an upper surface of the printed circuit board so as to be inserted in the first, second and third cutout portions  71 ,  72  and  73  and the first and second thru-holes  74 ,  75 ,  76  and  77 . Then, the solder block  80  is soldered to the first, second, third and fourth patterns  70   a ,  70   b ,  70   c  and  70   d , and electrically connects the central line of the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  to the first, second, third and fourth signal transmission patterns. Of course, the coaxial RF cables are configured so that the solder block  80  is electrically connected to the first, second, third and fourth grounds (not shown) on the other surface of the printed circuit board. 
     The first and second auxiliary bodies  84 ,  85 ,  86  and  87  are formed at both sides of each of the first, second and third central bodies  81 ,  82  and  83  in an upwardly protruding shape, and extend through the first and second thru-holes  74 ,  75 ,  76  and  77 , respectively. Further, the first, second and third central bodies  82 ,  81  and  83  extend upwardly over the auxiliary bodies  84 ,  85 ,  86  and  87 . The reason is because the first, second and third central bodies  82 ,  81  and  83  include first, second, third and fourth supporting openings  82   a ,  81   a ,  81   b  and  83   a  in order to connect the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  to the first, second, third and fourth signal transmission patterns  70   a ,  70   b ,  70   c  and  70   d  of the printed circuit board. 
     The first, second and third central bodies  82 ,  81  and  83  are integrally formed with the first and second auxiliary bodies  84 ,  85 ,  86  and  87 , and the solder block  70  may be manufactured by pressing or etching a brass plate in a predetermined shape. Since the solder block is manufactured in this process, it is possible to freely design parts and to easily change a shape. 
     When the solder block  80  having the structure as described above is inserted into the first, second and third cutout portions  71 ,  72  and  73 , and the first and second thru-holes  74 ,  75 ,  76  and  77 , and the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  are soldered to the first, second, third and fourth signal transmission patterns  70   a ,  70   b ,  70   c  and  70   d , the central lines of the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  are rigidly connected to the first, second, third and fourth signal transmission patterns  70   a ,  70   b ,  70   c  and  70   d , and upper ends of the first and second auxiliary bodies  84 ,  85 ,  86  and  87  extending through the first and second thru-holes  74 ,  75 ,  76  and  77  are fixed to the printed circuit board by soldering. That is, the connection device has the structure in that the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  firstly support the first, second and third central bodies  82 ,  81  and  83 , and the first and second auxiliary bodies  84 ,  85 ,  86  and  87  secondly support first, second and third central bodies  82 ,  81  and  83 . Therefore, the connection device stably connects the central lines of the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  to the first, second, third and fourth  70   a ,  70   b ,  70   c  and  70   d.    
     Preferably, the connection device is soldered to the printed circuit board at positions where the central lines of the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  are adjacent to or is in contact with the first, second, third and fourth patterns  70   a ,  70   b ,  70   c  and  70   d  respectively, and where the first and second auxiliary bodies are inserted in the first and second thru-holes  74 ,  75 ,  76  and  77 , in order to maintain a stability of a connection state. In the structure as described above, the solder block  80  keeps in contact with the first and second signal transmission patterns  70   a ,  70   b ,  70   c  and  70   d  and/or the first, second, third and fourth grounds (not shown). 
     Reference symbols S shown in  FIG. 1  denote soldered portions. 
     A structure of a connection device according to the fifth embodiment of the present invention will be described with reference to  FIGS. 11 to 13 . As shown in  FIGS. 11 to 13 , in the connection device according to the fifth embodiment of the present invention, a central body  101  and auxiliary bodies  102  and  103  of the solder block  100  have a downwardly protruding shape and extend from an upper surface to a bottom surface of the printed circuit board so as to be connected to one surface and/or the other surface of the printed circuit board, in comparison with the connection device shown in  FIG. 1 . The structure of the connection device will be described with reference to  FIGS. 11 to 13 . 
     The connection device includes the printed circuit board  90  and a solder block  100 . The printed circuit board  90  has a signal transmission pattern  92  on one surface thereof and aground (not shown) on the other surface thereof, and includes a cutout portion  94  and a pair of thru-holes  96  and  98  formed at both sides of the cutout portion  94 . The cutout portion  94  means a space in which a central body  101  of the solder block  100 , which is described later, and the coaxial RF cable C are inserted and soldered, and the thru-holes  96  and  98  mean spaces in which auxiliary bodies  102  and  103  of the solder block  100  described later are inserted and soldered. The thru-holes  96  and  98  are paired to include two openings, and the thru-holes are symmetrically disposed around the cutout portion  94  and opposite to each other. 
     The solder block  100  is a terminal which extends from an upper surface to a bottom surface of the printed circuit board  90  and is inserted into the cutout portion  94  and the thru-holes  96  and  98  and which in turn is soldered to the signal transmission pattern  92  to stably connect the central line of the coaxial RF cable C to the signal transmission pattern  92 . The solder block  100  includes a central body  101  and a pair of auxiliary bodies  102  and  103 . The central body  101  has an upwardly protruding shape and is disposed to extend through the cutout portion  94 , which has a supporting opening  104  in which the coaxial RF cable C is inserted. The auxiliary bodies  102  and  103  protrude downwardly from both sides of the central body  101 , and extend through the thru-holes  96  and  98 , respectively. The central body  101  is integrally formed with the auxiliary bodies  102  and  103 , and the solder block  100  may be manufactured by pressing or etching a brass plate in a predetermined shape. Since the solder block  100  is manufactured in this process, it is possible to freely design parts and to easily change a shape. 
     When the solder block  100  having the structure as described above is inserted in the cutout portion  94  and the thru-holes  96  and  98 , and the central line of the coaxial RF cable C is connected to the pattern  92  by soldering, the coaxial RF cable C is rigidly connected to the signal transmission pattern  92  and upper ends of the auxiliary bodies  102  and  103  extending through the thru-holes  96  and  98  are fixed to the printed circuit board  90  by soldering. That is, the connection device has a structure in that the central body  101  firstly supports the coaxial RF cable C and the auxiliary bodies  102  and  103  supports the central body  101 . Therefore, the central line of the coaxial RF cable C comes in stable contact with the signal transmission pattern  92 . 
     The connection device is preferably soldered to the printed circuit board at positions where the central line of the coaxial RF cable C is adjacent to the pattern  92  and where the auxiliary bodies extend through the thru-holes  96  and  98 , in order to maintain a stability of the connection. 
     In the structure as described above, the solder block  100  keeps in contact with the signal transmission pattern  92  and/or the ground surface (not shown). 
     Reference symbols S shown in  FIG. 13  denote soldered portions. 
     A structure of a connection device according to the sixth embodiment of the present invention will be described with reference to  FIGS. 14 and 15 . As shown in  FIGS. 14 and 15 , the solder block  120  employed to the connection device according to the sixth embodiment of the present invention has two supporting openings  124  and  125  in the central body  121 , in comparison with the solder block  100  shown in  FIG. 12 . The structure of the connection device will be described with reference to  FIGS. 14 and 15 . 
     The connection device includes the printed circuit board  110  and the solder block  120 . The printed circuit board  110  has first and second signal transmission patterns  111  and  112  on one surface  110   a  thereof and first and second grounds (not shown) on the other surface thereof, and includes a cutout portion  113  and a pair of thru-holes  114  and  115  formed at both sides of the cutout portion  113 . The cutout portion  113  means a space in which a central body  121  of the solder block  40 , which is described later, and the first and second coaxial RF cables C 1  and C 2  are inserted and soldered, and the thru-holes  114  and  115  mean spaces in which auxiliary bodies  122  and  123  of the solder block described later are inserted and soldered. The thru-holes  114  and  115  are paired to include two openings, and the thru-holes are symmetrically disposed around the cutout portion  113  and opposite to each other. 
     The solder block  120  is a terminal which extends from an upper surface to a bottom surface of the printed circuit board  110  and is inserted into the cutout portion  113  and the thru-holes  114  and  115  and which in turn is soldered to the signal transmission patterns  111  and  112  to stably connect the central lines of the first and second coaxial RF cables C 1  and C 2  to the signal transmission patterns  111  and  112 . The solder block  121  includes a central body  121  and a pair of auxiliary bodies  122  and  123 . The central body  121  has an upwardly protruding shape and is disposed to extend through the cutout portion  113 , which has first and second supporting openings  124  and  125  in which the coaxial RF cables C 1  and C 2  are inserted. The first and second supporting openings  124  and  125  have an identical shape, and are formed in parallel in the central body  121 . 
     The auxiliary bodies  121  and  123  protrude downwardly from both sides of the central body  121 , and extend through the thru-holes  114  and  115 , respectively. Further, the central bodies  122  and  123  extend downwardly rather than the auxiliary bodies  122  and  123 . Further, the solder block  120  may be manufactured by pressing or etching a brass plate in a predetermined shape. Since the solder block  120  is manufactured in this process, it is possible to freely design parts and to easily change a shape. 
     When the solder block  120  having the structure as described above is inserted in the cutout portion  113  and the thru-holes  114  and  115 , and the center line of the first and second coaxial RF cables C 1  and C 2  are soldered to the first and second patterns, it is preferable to solder positions where the central lines of the coaxial RF cables C 1  and C 2  are adjacent to or in contact with the signal transmission patterns, and the thru-holes  114  and  115  in which the auxiliary bodies are inserted, in order to maintain a stability of the connection. 
     At this time, the solder block  120  keeps in contact with the first and second signal transmission patterns  31  and  32 , and/or the first and second grounds (not shown, provided on a bottom surface of the printed circuit board). Reference symbols S shown in  FIG. 15  denote soldered portions. 
     A structure of a connection device according to the seventh embodiment of the present invention will be described with reference to  FIGS. 16 and 17 . As shown in  FIGS. 16 and 17 , the connection device according to the seventh embodiment of the present invention includes a printed circuit board  130  and a solder block  140 . The printed circuit board  130  includes first, second, third and fourth signal transmission patterns  130   a ,  130   b ,  130   c  and  130   d  on one surface  130   a  thereof, and a pair of thru-holes  134  and  135  formed among the first, second and third cutout portions  131 ,  132  and  133 . The first, second and third cutout portions  131 ,  132  and  133  mean spaces in which first, second and third central bodies  142 ,  141  and  143  of the solder block, which is described later, and the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  are inserted and soldered, and the first and second thru-holes  134  and  135  mean spaces in which auxiliary bodies  144  and  145  of the solder block described later are inserted and soldered, respectively. The thru-holes  134  and  135  are paired to include two openings. 
     The solder block  140  is a terminal which extends from an upper surface to a bottom surface of the printed circuit board  130  and is inserted into the first, second and third cutout portions  131 ,  132  and  133  and the thru-holes  135  and  136  and which in turn is soldered to the first, second, third and fourth signal transmission patterns  130   a ,  130   b ,  130   c  and  130   d  to stably connect the central lines of the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  to the first, second, third and fourth signal transmission patterns  130   a ,  130   b ,  130   b  and  130   d . The solder block  140  includes the first, second and third central bodies  142 ,  141  and  143  and a pair of auxiliary bodies  144  and  145 . The first, second and third central bodies  142 ,  141  and  143  have a downwardly protruding shape. The second central body  141  includes first and second openings  147  and  148 , the first central body  142  includes a third supporting opening  146 , and the third central body  143  includes a fourth supporting opening  149 . The first, second, third and fourth openings  147 ,  148 ,  146  and  149  are formed in parallel. The first and second supporting openings  146  and  147  have an identical shape, and are symmetrically formed in the second central body  141  in parallel. In addition, the third and fourth supporting openings  146  and  149  are symmetric around the first and second supporting openings  147  and  148  and opposite to each other. 
     The auxiliary bodies  144  and  145  extend downwardly through the thru-holes  134  and  135  between the first and second central bodies  142  and  141 , and between the first and third central bodies  141  and  143 , respectively, and have a downwardly protruding shape. Further, the auxiliary bodies  144  and  145  extend downwardly rather than the first, second and third central bodies  142 ,  141  and  143 . The first, second and third central bodies  142 ,  141  and  143  and the auxiliary bodies  144  and  145  are integrally manufactured. Further, the solder block  140  may be manufactured by pressing or etching a brass plate in a predetermined shape. Since the solder block  140  is manufactured in this process, it is possible to freely design parts and to easily change a shape. 
     When the solder block  140  having the structure as described above is inserted into the first, second and third cutout portions  131 ,  132  and  133  and the thru-holes  134  and  135 , and the central lines of the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  are soldered to the first, second, third and fourth signal transmission patterns  130   a ,  130   b ,  130   c  and  130   d , the first, second, third and fourth RF cables C 1 , C 2 , C 3  and C 4  are maintained by the solder block in a rigid connection state. Preferably, the connection device is soldered to the printed circuit board at positions where the central lines of the first, second, third and fourth coaxial RF cables C 1 , C 2 , C 3  and C 4  are adjacent to or in connect with the first, second, third and fourth patterns  130   a ,  130   b ,  130   c  and  130   d  respectively, and where the auxiliary bodies are inserted in the thru-holes  134  and  135 , in order to maintain a stability of a connection state. Reference symbols S shown in  FIG. 17  denote soldered portions. 
     Additionally, the solder block may be in contact with the first, second, third and fourth signal transmission patterns  130   a ,  130   b ,  130   c  and  130   d  and/or the first, second, third and fourth grounds (not shown, provided on a bottom surface of the printed circuit board). 
     In addition, the solder block  20 ,  40 ,  60 ,  80 ,  100 ,  120  or  140  employed to the connection device according to the various embodiments of the present invention is preferably soldered to the printed circuit board in an upright position, and more preferably is simultaneously connected to one surface (signal transmission pattern) and/or the other surface (ground).