Patent Publication Number: US-6906603-B2

Title: High-frequency module for commonality of circuit board

Description:
This application claims the benefit of priority to Japanese Patent Application 2002-003690, filed Jun. 18, 2002. 
   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a high-frequency module preferably applicable to a short-range radio data communication unit or the like. 
   2. Description of the Related Art 
   Conventional high-frequency modules will be described with the drawings.  FIG. 14  is a perspective view showing the overview of a first form of a conventional high-frequency module.  FIG. 15  is an enlarged plan view of principal parts of a circuit board of the first form of the conventional high-frequency module.  FIG. 16  is a cross-sectional view of principal parts of a coaxial connector in the first form of the conventional high-frequency module.  FIG. 17  is a schematic side view of the first form of the conventional high-frequency module.  FIG. 18  is a plan view of a lower surface of the coaxial connector in the first form of the conventional high-frequency module.  FIG. 19  is a plan view showing the circuit board on which the coaxial connector is mounted, in the first form of the conventional high-frequency module.  FIG. 20  is a cross-sectional view showing an inspection status of the first form of the conventional high-frequency module. 
     FIG. 21  is a perspective view showing the overview of a second form of the conventional high-frequency module.  FIG. 22  is an enlarged plan view of principal parts of a circuit board of the second form of the conventional high-frequency module.  FIG. 23  is a cross-sectional view of principal parts of a coaxial connector in the second form of the conventional high-frequency module, showing a central conductor of the connector.  FIG. 24  is a cross-sectional view of principal parts of the coaxial connector in the second form of the conventional high-frequency module, showing an external conductor of the connector.  FIG. 25  is a plan view of a lower surface of the coaxial connector in the second form of the conventional high-frequency module.  FIG. 26  is a plan view showing the circuit board on which the coaxial connector is mounted, in the second form of the conventional high-frequency module.  FIG. 27  is a cross-sectional view showing an inspection status of the second form of the conventional high-frequency module. 
   Next, the first form of conventional high-frequency module will be described with reference to  FIGS. 14  to  20 . A wiring pattern  52  is formed on one surface (upper surface) side of a circuit board  51  made up of a print circuit board, and various electric components (not shown) are mounted on the wiring pattern  52 , thus a desired electric circuit (transmission reception circuit) is formed. 
   A metal-plate cover  56  is attached to a necessary portion of the electric circuit, thus a part of the electric circuit is electrically shielded. 
   Further, a setting pattern  53  for setting a coaxial connector (to be described later) is formed on the circuit board  51 . 
   As particularly shown in  FIG. 15 , the setting pattern  53  is constituted with four grounding lands  54  arranged in four corners of a square area and two lands  55   a  and  55   b  opposite to each other positioned between the grounding lands  54 . 
   Although not shown here, the grounding lands  54  are connected to an grounding pattern of the wiring pattern  52 . The one land  55   a  is connected to the electric circuit by a leading pattern  52   a , and the other land  55   b  is connected to a connection pattern  52   b  for an antenna. 
   Further, an antenna  57  is mounted on the circuit board  51 . The antenna  57  is connected to the wiring pattern  52  by the connection pattern  52   b  as a part of the wiring pattern  52 . 
   As particularly shown in  FIGS. 16  to  18 , a coaxial connector  58  is constituted with an insulating base  59  made of an insulating material, an external conductor  60  attached to the outer periphery of an insulating base  59  in a status where the external conductor is supported (embedded) in the insulating base  59 , and a pair of first and second central conductors  61  and  62  attached inside the insulating base  59  in a status where the central conductors are supported (embedded) in the insulating base  59 . 
   The external conductor  60  has a cylindrical member  60   a  and four grounding electrodes  60   b  extended from the cylindrical member  60   a  and provided in four corners of a rectangular lower surface of the insulating base  59 . Further, the first central conductor  61  has a fixed contact  61   a  exposed inside the insulating base  59  and an electrode  61   b  extended from the fixed contact  61   a  and provided in a central portion of one side of the lower surface of the insulating base  59 . Further, the second central conductor  62  has a movable contact  62   a  which is exposed from a hole  59   a  at the center of the insulating base  59  and which is connectable/disconnectable to/from the fixed contact  61   a  and an electrode  62   b  extended from the movable contact  62   a  and provided in a central portion of another side of the lower surface of the insulating base  59 . 
   Further, the first and second central conductors  61  and  62  are in contact with each other under normal conditions. When the movable contact  62   a  is depressed, the movable contact  62   a  is moved away from the fixed contact  61   a  and electrical continuity is broken. When the depression of the movable contact  62   a  is released, the movable contact  62   a  returns by its spring force and the both contacts become in electrical continuity. In this manner, the coaxial connector  58  is a so-called coaxial connector with switch. 
   The coaxial connector  58  having the above construction is mounted on the setting pattern  53  of the circuit board  51  and soldered to the setting pattern  53 . 
   That is, as shown in  FIG. 19 , when the coaxial connector  58  is set, the four grounding electrodes  60   b  are respectively connected to the four grounding lands  54 , the electrode  61   b  of the first central conductor  61  is connected to the land  55   b  and connected to the antenna  57 , and the electrode  62   b  of the second central conductor  62  is connected to the land  55   a  and connected to the electric circuit. 
   At this time, the width of the grounding electrodes  60   b  and that of the grounding lands  54  are the same, and connected to each other as indicated by hatched portions in FIG.  19 . The width of the electrodes  61   b  and  62   b  and that of the lands  55   a  and  55   b  are the same, and connected to each other as indicated by hatched portions in FIG.  19 . 
   As a result, the antenna  57  is connected via the second central conductor  62  connected to the electric circuit and the first central conductor  61  provided between the antenna  57  and the second central conductor  62 . 
   In the high-frequency module having the above construction, data transmission/reception is performed via the internal antenna  57 . 
   Further, prior to shipment, various electrical inspections are performed on the high-frequency module. As shown in  FIG. 20 , an inspection member  63  made up of a coaxial connector is inserted into the coaxial connector  58  and the inspections are performed. 
   When the inspection member  63  is inserted into the coaxial connector  58 , an external conductor  64  is connected to the external conductor  60 , and the second central conductor  62  is depressed while a central conductor  65  is in contact with the second central conductor  62 , so as to break connection with the first central conductor  61  and disconnect the first central conductor from the antenna  57 . 
   In this status, a signal is sent from the inspection member  63  to the electric circuit for inspection of reception status, or a signal is sent from the electric circuit to the inspection member  63  for inspection of transmission status. 
   When the inspections have been completed, the inspection member  63  is removed, so that the first and second central conductors  61  and  62  return to the contact status. 
   Next, the construction of a second form of conventional high-frequency module will be described with reference to  FIGS. 21  to  27 . A wiring pattern  72  is formed on one surface (upper surface) side of a circuit board  71  made up of a print circuit board. Various electric components (not shown) are mounted on the wiring pattern  72 , thus a desired electric circuit (transmission reception circuit) is formed. 
   A metal-plate cover  76  is attached to a necessary portion of the electric circuit, thus a part of the electric circuit is electrically shielded. 
   Further, a setting pattern  73  for setting a coaxial connector (to be described later) is formed on the circuit board  71 . 
   As particularly shown in  FIG. 22 , the setting pattern  73  is constituted with two band-shaped grounding lands  74  provided to be opposite to each other with an interval therebetween, and one land  75  provided in a position a little away from the grounding lands  74 . 
   Although not shown here, the grounding lands  74  are connected to an grounding pattern of the wiring pattern  72 . The land  75  is connected to the electric circuit by a leading pattern  72   a.    
   In this second form of conventional high-frequency module, the connection pattern  52   b  for antenna in the first form of conventional high-frequency module is deleted. 
   As particularly shown in  FIGS. 23  to  25 , the coaxial connector  78  is constituted with an insulating base  79  made of an insulating material, an external conductor  80  attached to the outer periphery of an insulating base  79  in a status where the external conductor is supported (embedded) in the insulating base  79 , and one central conductor  81  attached to the center of the insulating base  79  in a status where the central conductor is supported (embedded) in the insulating base  79 . 
   The external conductor  80  has a cylindrical member  80   a  and two grounding electrodes  80   b  extended from the cylindrical member  80   a  and provided in opposed two corners of a rectangular lower surface of the insulating base  79 . Further, the central conductor  81  has a cylindrical member  81   a  exposed in a hollow of the external conductor  80  and an electrode  81   b  extended from the cylindrical member  81   a  and provided in a central portion of one side of the lower surface of the insulating base  79 . 
   Further, unlike the first form of conventional high-frequency module, the coaxial connector  78  is a coaxial connector without a switch. 
   The coaxial connector  78  having the above construction is mounted on a setting pattern  73  of the circuit board  71  and soldered to the setting pattern  73 . 
   That is, as shown in  FIG. 26 , when the coaxial connector  78  is set, the two grounding electrodes  80   b  are respectively connected to the two grounding lands  74  and the electrode  81   b  of the one central conductor  81  is connected to the land  75  and connected to the electric circuit. 
   At this time, the width of the grounding electrode  80   b  and that of the grounding lands  74  are the same and connected to each other as indicated by hatched portions in  FIG. 26 , and the width of the electrode  81  and that of the land  75  are the same, and connected to each other as indicated by hatched portions in FIG.  26 . 
   Further, when the high-frequency module having the above construction is used, the antenna  82  as a separate member is inserted into the coaxial connector  78 . As a result, in the high-frequency module having this construction, data transmission/reception is performed via the antenna  82  as a separate member. 
   Further, prior to shipment, various electrical inspections are performed on the high-frequency module. As shown in  FIG. 27 , an inspection member  83  made up of a coaxial connector is inserted into the coaxial connector  78  and the inspections are performed. 
   When the inspection member  83  is inserted into the coaxial connector  78 , an external conductor  84  is connected to the external conductor  80 , and a central conductor  85  is in contact with the central conductor  81 . 
   In this status, a signal is sent from the inspection ember  83  to the electric circuit for inspection of reception status, or a signal is sent from the electric circuit to the inspection member  83  for inspection of transmission status. 
   When the inspections have been completed, the inspection member  83  is removed, and the antenna  82  as a separate member is attached so that the module can be provided for use. 
   Generally, the high-frequency module has a first form as a module with antenna and a second form as a module without antenna. In the first form as a module with antenna, to disconnect the module from the antenna  57  upon inspection, the expensive coaxial connector  58  with a switch is used. Further, in the second form as a module without antenna, since it is not necessary to disconnect the module from the antenna upon inspection, the low-price coaxial connector  78  without a switch is used. 
   The circuit boards  51  and  71  used in the first and second forms of high-frequency modules are different from each other. Further, in the setting patterns  53  and  73  for setting the coaxial connectors  58  and  78 , respectively specialized patterns are formed. 
   In the conventional high-frequency modules, as the circuit boards  51  and  71  in the first and second forms are different from each other, they must be separately manufactured at higher costs. 
   Further, as the circuit boards  51  and  71  in the first and second forms are different from each other, the specifications must be respectively certified, thus it takes a lot of trouble with the certification. 
   SUMMARY OF THE INVENTION 
   Accordingly, an object of the present invention is to attain commonality of circuit board and to provide a low-price high-frequency module which reduces labor in certification. 
   As a first solution for the above problems, there is provided a high-frequency module having: a circuit board where a wiring pattern is formed at least on one surface side and a desired electric circuit is formed by mounting an electric component on the wiring pattern; and a setting pattern having a conductive pattern formed on the circuit board for setting at least first and second two forms of coaxial connectors, wherein the setting pattern includes band-shaped first and second grounding lands provided to be opposite to each other with an interval therebetween, and first and second lands provided to be opposite to each other between the first and second grounding lands, external conductors of the first and second forms of coaxial connectors are solderable to the first and second grounding lands, and central conductors of the first and second forms of coaxial connectors are solderable to one or both of the first and second lands. 
   Further, as a second solution, in the above high-frequency module, a transmission reception circuit is formed on the circuit board, and a connection pattern for connection with an antenna is formed on the circuit board. 
   Further, as a third solution, in the above high-frequency module, the first form of coaxial connector has: mutually-connectable/disconnectable first and second central conductors; an insulating base supporting the central conductors and the external conductors; four grounding electrodes provided in positions of first and second sides of a lower surface of the insulating base except central portions of the first and second sides; and two electrodes provided in central portions of third and fourth sides positioned between the first and second sides of the lower surface of the insulating base, wherein the four grounding electrodes are solderable in positions except middle portions of the first and second grounding lands, the two electrodes are solderable to the first and second lands, the second form of coaxial connector has: an insulating base supporting the central conductors and the external conductors; two grounding electrodes provided in positions of the first and second sides of the lower surface of the insulating base except both ends of the first and second sides; and one electrode provided in one of the central portions of the third and fourth sides positioned between the first and second sides of the lower surface of the insulating base, the two grounding electrodes are solderable in central portions of the first and second grounding lands, and the one electrode is solderable to one of the first and second lands. 
   Further, as a fourth solution, in the above high-frequency module, a width of the first and second grounding lands is greater than that of the grounding electrodes of the first and second forms of coaxial connectors, and soldering overlaps of the grounding electrodes are formed in positions outside of the first and second grounding lands. 
   Further, as a fifth solution, in the above high-frequency module, the soldering overlaps of the first and second grounding lands are provided with a notch around boundaries of the grounding electrodes of the first and second forms of coaxial connectors on the first and second grounding lands. 
   Further, as a sixth solution, in the above high-frequency module, a width of the first and second lands is greater than that of the electrodes of the first and second forms of coaxial connectors, and soldering overlaps are formed in positions outside of the first and second lands. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view showing the overview of a first form of the high-frequency module according to the present invention; 
       FIG. 2  is an enlarged plan view of principal parts of a circuit board of the first form of the high-frequency module according to the present invention; 
       FIG. 3  is a cross-sectional view of principal parts of a coaxial connector in the first form of the high-frequency module according to the present invention; 
       FIG. 4  is a schematic side view of the coaxial connector in the first form of the high-frequency module according to the present invention; 
       FIG. 5  is a plan view of a lower surface of the coaxial connector in the first form of the high-frequency module according to the present invention; 
       FIG. 6  is a plan view showing the circuit board on which the coaxial connector is mounted, in the first form of the high-frequency module according to the present invention; 
       FIG. 7  is a cross-sectional view showing an inspection status of the first form of the high-frequency module according to the present invention; 
       FIG. 8  is a perspective view showing the overview of a second form of the high-frequency module according to the present invention according to the present invention; 
       FIG. 9  is a cross-sectional view of principal parts of a coaxial connector in the second form of the high-frequency module, showing a central conductor of the connector according to the present invention; 
       FIG. 10  is a cross-sectional view of principal parts of the coaxial connector in the second form of the high-frequency module, showing an external conductor of the connector according to the present invention; 
       FIG. 11  is a plan view of a lower surface of the coaxial connector in the second form of the high-frequency module according to the present invention; 
       FIG. 12  is a plan view showing the circuit board on which the coaxial connector is mounted, in the second form of the high-frequency module according to the present invention; 
       FIG. 13  is a cross-sectional view showing an inspection status of the second form of the high-frequency module according to the present invention; 
       FIG. 14  is a perspective view showing the overview of the first form of a conventional high-frequency module; 
       FIG. 15  is an enlarged plan view of principal parts of the circuit board of the first form of the conventional high-frequency module; 
       FIG. 16  is a cross-sectional view of principal parts of the coaxial connector in the first form of the conventional high-frequency module; 
       FIG. 17  is a schematic side view of the coaxial connector in the first form of the conventional high-frequency module; 
       FIG. 18  is a plan view of a lower surface of the coaxial connector in the first form of the conventional high-frequency module; 
       FIG. 19  is a plan view showing the circuit board on which the coaxial connector is mounted, in the first form of the conventional high-frequency module; 
       FIG. 20  is a cross-sectional view showing the inspection status of the first form of the conventional high-frequency module; 
       FIG. 21  is an overall perspective view showing the overview of the second form of the conventional high-frequency module; 
       FIG. 22  is an enlarged plan view of principal parts of the circuit board of the second form of the conventional high-frequency module; 
       FIG. 23  is a cross-sectional view of principal parts of the coaxial connector in the second form of the conventional high-frequency module, showing the central conductor of the connector; 
       FIG. 24  is a cross-sectional view of principal parts of the coaxial connector in the second form of the conventional high-frequency module, showing the external conductor of the connector; 
       FIG. 25  is a plan view of the lower surface of the coaxial connector in the second form of the conventional high-frequency module; 
       FIG. 26  is a plan view showing the circuit board on which the coaxial connector is mounted, in the second form of the conventional high-frequency module; and 
       FIG. 27  is a cross-sectional view showing the inspection status of the second form of the conventional high-frequency module. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   The high-frequency module according to the present invention will be described with the drawings.  FIG. 1  is a perspective view showing the overview of a first form of the high-frequency module according to the present invention.  FIG. 2  is an enlarged plan view of principal parts of a circuit board of the first form of high-frequency module according to the present invention.  FIG. 3  is a cross-sectional view of principal parts of a coaxial connector in the first form of high-frequency module according to the present invention.  FIG. 4  is a schematic side view of the coaxial connector in the first form of high-frequency module according to the present invention.  FIG. 5  is a plan view of a lower surface of the coaxial connector in the first form of high-frequency module according to the present invention.  FIG. 6  is a plan view showing the circuit board on which the coaxial connector is mounted, in the first form of high-frequency module according to the present invention.  FIG. 7  is a cross-sectional view showing an inspection status of the first form of high-frequency module according to the present invention. 
     FIG. 8  is a perspective view showing the overview of a second form of the high-frequency module according to the present invention according to the present invention.  FIG. 9  is a cross-sectional view of principal parts of a coaxial connector in the second form of the high-frequency module, showing a central conductor of the connector according to the present invention.  FIG. 10  is a cross-sectional view of principal parts of the coaxial connector in the second form of the high-frequency module, showing an external conductor of the connector according to the present invention.  FIG. 11  is a plan view of a lower surface of the coaxial connector in the second form of the high-frequency module according to the present invention.  FIG. 12  is a plan view showing the circuit board on which the coaxial connector is mounted, in the second form of the high-frequency module according to the present invention.  FIG. 13  is a cross-sectional view showing an inspection status of the second form of the high-frequency module according to the present invention. 
   Next, the construction of a first form of high-frequency module according to the present invention will be described with reference to  FIGS. 1  to  7 . A wiring pattern  2  is formed on one surface (upper surface) side of a circuit board  1  made up of a print circuit board, and various electric components (not shown) are mounted on the wiring pattern  2 , thus a desired electric circuit (transmission reception circuit) is formed. 
   A metal-plate cover  8  is attached to a necessary portion of the electric circuit, thus a part of the electric circuit is electrically shielded. 
   Further, a setting pattern  3  for setting a coaxial connector (to be described later) is formed on the circuit board  1 . 
   As particularly shown in  FIG. 2 , the setting pattern  3  is constituted with band-shaped first and second grounding lands  4  and  5  provided to be opposite to each other with an interval therebetween, and first and second lands  6  and  7  opposite to each other positioned between the first and second grounding lands  4  and  5 . 
   Further, the first and second grounding lands  4  and  5  are provided with notches  4   a  and  5   a  at an interval in the peripheral portions, where wide portions without the notches  4   a  and  5   a  are soldering overlaps  4   b  and  5   b . Further, the first and second lands  6  and  7  are provided with wide portions as soldering overlaps  6   b  and  7   b  on the outer side. 
   Although not shown here, the first and second grounding lands  4  and  5  are connected to an grounding pattern of the wiring pattern  2 . The first land  6  is connected to the electric circuit by a leading pattern  2   a , and the second land  7  is connected to a connection pattern  2   b  for an antenna. 
   Further, an antenna  9  is mounted on the circuit board  1 . The antenna  9  is connected to the wiring pattern  2  by the connection pattern  2   b  as a part of the wiring pattern  2 . 
   As particularly shown in  FIGS. 3  to  5 , the coaxial connector  11  is constituted with an insulating base  12  made of an insulating material, an external conductor  13  attached to the outer periphery of the insulating base  12  in a status where the external conductor is supported (embedded) in the insulating base  12 , and a pair of first and second central conductors  14  and  15  attached inside the insulating base  12  in a status where the central conductors are supported (embedded) in the insulating base  12 . 
   The external conductor  13  has a cylindrical member  13   a  and four grounding electrodes  13   b  extended from the cylindrical member  13   a  and provided in positions except central portions of opposed first and second sides (four corners) of a rectangular lower surface of the insulating base  12 . Further, the first central conductor  14  has a fixed contact  14   a  exposed inside the insulating base  12  and an electrode  14   b  extended from the fixed contact  14   a  and provided in a central portion of a third side of the lower surface of the insulating base  12 . Further, the second central conductor  15  has a movable contact  15   a  which is exposed from a hole  12   a  at the center of the insulating base  12  and which is connectable/disconnectable to/from the fixed contact  14   a  and an electrode  15   b  extended from the movable contact  15   a  and provided in a central portion of a fourth side of the lower surface of the insulating base  12 . 
   Further, the first and second central conductors  14  and  15  are in contact with each other under normal conditions. When the movable contact  15   a  is depressed, the movable contact  15   a  is moved away from the fixed contact  14   a  and electrical continuity is broken. When the depression of the movable contact  15   a  is released, the movable contact  15   a  returns by its spring force and the both contacts become in electrical continuity. In this manner, the coaxial connector  11  is a so-called coaxial connector with switch. 
   The coaxial connector  11  having the above construction is mounted on the setting pattern  3  of the circuit board  1  and soldered to the setting pattern  3 . 
   That is, as shown in  FIG. 6 , when the coaxial connector  11  is set, the four grounding electrodes  13   b  are respectively connected to the first and second grounding lands  4  and  5 . 
   At this time, as shown in  FIG. 6 , as the width of the first and second grounding lands  4  and  5  is greater than that of the grounding electrodes  13   b , the grounding electrodes  13   b  are soldered in a hatched position in the figure. 
   That is, the four grounding electrodes  13   b  are positioned in portions except central portions of the first and second grounding lands  4  and  5  in a status where ends of the grounding electrodes are positioned around the notches  4   a  and  5   a , and at the same time, the soldering overlaps  4   b  and  5   b  partitioned by the notches  4   a  and  5   a  are positioned outside the four grounding electrodes  13   b . Thus soldering is ensured, and the soldered status can be easily visually observed from the outside. 
   Further, as shown in  FIG. 6 , as the width of the first and second lands  6  and  7  is greater than that of the first and second electrodes  14   b  and  15   b , the first and second electrodes  14   b  and  15   b  are soldered in hatched positions in the figure. 
   That is, the first and second electrodes  14   b  and  15   b  are positioned inside the first and second lands  6  and  7 , and the soldering overlaps  6   b  and  7   b  are positioned outside the first and second electrodes  14   b  and  15   b . Thus soldering is ensured, and the soldered status can be easily visually observed from the outside. 
   Further, when the coaxial connector  3  is set on the setting pattern  11 , the antenna  9  is connected via the second central conductor  15  connected to the electric circuit and the first central conductor  14  provided between the antenna  9  and the second central conductor  15 . 
   In the high-frequency module having the above construction, data transmission/reception is performed via the internal antenna  9 . 
   Further, prior to shipment, various electrical inspections are performed on the high-frequency module. As shown in  FIG. 7 , an inspection member  16  made up of a coaxial connector is inserted into the coaxial connector  11  and the inspections are performed. 
   When the inspection member  16  is inserted into the coaxial connector  11 , the external conductor  17  is connected to the external conductor  13 , and the second central conductor  15  is depressed while the central conductor  18  is in contact with the second central conductor  15 , so as to break connection with the first central conductor  14  and disconnect the conductor from the antenna  9 . 
   In this status, a signal is sent from the inspection member  16  to the electric circuit for inspection of reception status, or a signal is sent from the electric circuit to the inspection member  16  for inspection of transmission status. 
   When the inspections have been completed, the inspection member  16  is removed, so that the first and second central conductors  14  and  15  return to the status where they are in contact. 
   Next, the construction of a second form of the high-frequency module according to the present invention will be described with reference to  FIGS. 8  to  13 . As the circuit board  1  made up of print circuit board has the same construction as that of the circuit board of the first form of the high-frequency module, the corresponding elements have the same reference numerals. The wiring pattern  2  is formed on one surface (upper surface) side of the circuit board  1 . Various electric components (not shown) are mounted on the wiring pattern  2 , thus a desired electric circuit (transmission reception circuit) is formed. 
   The metal-plate cover  8  is attached to a necessary portion of the electric circuit, thus a part of the electric circuit is electrically shielded. 
   Further, the setting pattern  3  for setting the coaxial connector (to be described later) is formed on the circuit board  1 . 
   As the setting pattern  3  is the same structure as that of the first embodiment, the corresponding elements have the same reference numerals and explanations thereof will be omitted. 
   Although not shown here, the first and second grounding lands  4  and  5  are connected to the grounding pattern of the wiring pattern  2 . Further, in the second form of high-frequency module, the first land  6  is connected to the electric circuit by the leading pattern  2   a , and the second land  7  is connected to the connection pattern  2   b  for antenna, however, the connection pattern  2   b  is not connected to an antenna. 
   As particularly shown in  FIGS. 9  to  13 , the coaxial connector  21  is constituted with an insulating base  22  made of an insulating material, an external conductor  23  attached to the outer periphery of the insulating base  22  in a status where the external conductor is supported (embedded) in the insulating base  22 , and one central conductor  24  attached to the center of the insulating base  22  in a status where the central conductor is supported (embedded) in the insulating base  22 . 
   The external conductor  23  has a cylindrical member  23   a , and two grounding electrodes  23   b  extended from the cylindrical member  23   a  and provided in central portions of opposed two sides of a rectangular lower surface of the insulating base  22 . Further, the central conductor  24  has a cylindrical member  24   a  exposed in a hollow of the external conductor  23  and an electrode  24   b  extended from the cylindrical member  24   a  and provided in a central portion of one side of the lower surface of the insulating base  22 . 
   Further, unlike the first embodiment, the coaxial connector  21  is a coaxial connector without switch. 
   The coaxial connector  21  having the above construction is mounted on the setting pattern  3  of the circuit board  1  and soldered to the setting pattern  3 . 
   That is, as shown in  FIG. 12 , when the coaxial connector  21  is set, the two grounding electrodes  23   b  are respectively connected to the first and second grounding lands  4  and  5 . 
   At this time, as shown in  FIG. 12 , as the width of the grounding lands  4  and  5  is greater than that of the grounding electrodes  23   b , the grounding electrodes  23   b  are soldered in hatched portions in the figure. 
   That is, the  2  grounding electrodes  23   b  are positioned in the central portions of the first and second grounding lands  4  and  5  in a status where ends of the grounding electrodes are positioned around the notches  4   a  and  5   a , and at the same time, the soldering overlaps  4   b  and  5   b  partitioned by the notches  4   a  and  5   a  are positioned outside the two grounding electrodes  23   b . Thus the soldering is ensured, and the soldered status can be easily visually observed from the outside. 
   Further, as shown in  FIG. 12 , as the width of the first and second lands  6  and  7  is greater than that of the electrode  24   b , the electrode  24   b  is soldered to the first land  6  in a hatched position in the figure. 
   That is, the electrode  24   b  is positioned inside the first land  6 , and the soldering overlap  6   b  is positioned outside the electrode  24   b . Thus the soldering is ensured, and the soldered status can be easily visually observed from the outside. 
   Further, when the high-frequency module having the above construction is used, an antenna  25  as a separate member is inserted into the coaxial connector  21 . As a result, in the high-frequency module having this construction, data transmission/reception is performed via the antenna  25  as a separate member. 
   Further, prior to shipment, various electrical inspections are performed on the high-frequency module. As shown in  FIG. 13 , an inspection member  26  made up of a coaxial connector is inserted into the coaxial connector  21  and the inspections are performed. 
   When the inspection member  26  is inserted into the coaxial connector  21 , an external conductor  27  is connected to the external conductor  23 , and the central conductor  28  is in contact with the central conductor  24 . 
   In this status, a signal is sent from the inspection member  26  to the electric circuit for inspection of reception status, or a signal is sent from the electric circuit to the inspection member  26  or inspection of transmission status. 
   When the inspections have been completed, the inspection member  26  is removed, and the antenna  25  as a separate member is attached so that the module can be provided for use. 
   Generally, the high-frequency module has a first form as a module with antenna and a second form as a module without antenna. In the first form as a module with antenna, to disconnect the module from the antenna  9  upon inspection, the expensive coaxial connector  11  with switch is used. Further, in the second form as a module without antenna, since it is not necessary to disconnect the module from the antenna upon inspection, the low-price coaxial connector  21  without switch is used. 
   In the first and second forms of high-frequency modules, the same circuit board  1  is used. In the first form, the coaxial connector  11  with switch is set on the setting pattern  3 , and in the second form, the coaxial connector  21  without switch is set on the setting pattern  3 . 
   Note that in the above embodiment, the high-frequency module is applied to a short-range radio data communication unit, however, it may be applied to other electronic units and the like. 
   As described above, the present invention provides a high-frequency module having: a circuit board where a wiring pattern is formed at least on one surface side and a desired electric circuit is formed by mounting an electric component on the wiring pattern; and a setting pattern having a conductive pattern formed on the circuit board for setting at least first and second two forms of coaxial connectors, wherein the setting pattern includes band-shaped first and second grounding lands provided to be opposite to each other with an interval therebetween, and first and second lands provided to be opposite to each other between the first and second grounding lands, external conductors of the first and second forms of coaxial connectors are solderable to the first and second grounding lands, and central conductors of the first and second forms of coaxial connectors are solderable to one or both of the first and second lands. 
   In this manner, as the first and second forms of coaxial connectors can be set on one circuit board, the circuit board can be manufactured more easily and at a lower cost in comparison with the conventional art. 
   Further, as the commonality of the circuit board can be attained, certification of specifications is necessary only once, and the labor in certification can be reduced in comparison with the conventional art. 
   Further, in the high-frequency module, a transmission reception circuit is formed on the circuit board, and a connection pattern for connection with an antenna is formed on the circuit board. Therefore, a high-frequency module especially appropriate to a short-range radio data communication unit can be obtained. 
   Further, in the high-frequency module, the first form of coaxial connector has: mutually-connectable/disconnectable first and second central conductors; an insulating base supporting the central conductors and the external conductors; four grounding electrodes provided in positions of first and second sides of a lower surface of the insulating base except central portions of the first and second sides; and two electrodes provided in central portions of third and fourth sides positioned between the first and second sides of the lower surface of the insulating base, wherein the four grounding electrodes are solderable in positions except middle portions of the first and second grounding lands, the two electrodes are solderable to the first and second lands, the second form of coaxial connector has: an insulating base supporting the central conductors and the external conductors; two grounding electrodes provided in positions of the first and second sides of the lower surface of the insulating base except both ends of the first and second sides; and one electrode provided in one of the central portions of the third and fourth sides positioned between the first and second sides of the lower surface of the insulating base, wherein the two grounding electrodes are solderable in central portions of the first and second grounding lands, and the one electrode is solderable to one of the first and second lands. 
   In this construction, the first form of coaxial connector with switch and the second form of coaxial connector without switch can be easily set on the setting pattern, and the commonality of circuit board can be easily attained. 
   Further, in the high-frequency module, a width of the first and second grounding lands is greater than that of the grounding electrodes of the first and second forms of coaxial connectors, and soldering overlaps of the grounding electrodes are formed in positions outside of the first and second grounding lands. Therefore, the grounding electrodes can be infallibly soldered to the grounding lands, and the soldered status can be easily visually observed from the outside, further, inspections can be easily performed. 
   Further, in the high-frequency module, the soldering overlaps of the first and second grounding lands are provided with a notch around boundaries of the grounding electrodes of the first and second forms of coaxial connectors on the first and second grounding lands. As the amount of solder to the soldering overlaps can be increased, the soldering can be more infallibly made. 
   Further, in the high-frequency module, a width of the first and second lands is greater than that of the electrodes of the first and second forms of coaxial connectors, and soldering overlaps are formed in positions outside of the first and second lands. Therefore, the electrodes can be infallibly soldered to the lands, and the soldered status can be easily visually observed from the outside, further, inspections can be easily performed.