Abstract:
A coaxial plug connector arrangement is provided, having an inner sleeve which is pluggable into an outer sleeve in an axial direction. The inner and outer sleeves have respective through openings for inserting first and second contact pins, respectively. A first insulating part is fixed to the inner sleeve. The two contact pins are connected together in an electrically conductive manner via an inner conductor part held on the first insulating part. In a plugged-in state, the inner sleeve is spaced at a distance from the outer sleeve in the axial direction. To provide low passive intermodulation, the inner sleeve rests in an electrically conductive manner against a single contact area disposed on an inner side of the outer sleeve which surrounds the inner sleeve in a circumferential direction. The outer sleeve is fixed via a second insulating part to the inner sleeve in an axially and radially immovable manner.

Description:
[0001]    This application claims the benefit of German application number 10 2013 107 820.6 filed on Jul. 22, 2013, which is incorporated herein by reference in its entirety and for all purposes. 
       BACKGROUND OF THE INVENTION 
       [0002]    The invention relates to a coaxial plug connector arrangement, comprising an inner sleeve and an outer sleeve, the inner sleeve being pluggable into the outer sleeve in the axial direction and having a through opening for inserting a first contact pin, and the outer sleeve having a second through opening for inserting a second contact pin, and comprising a first insulating part which is fixed to the inner sleeve and on which an inner conductor part is held, the two contact pins being connectable to one another in an electrically conductive manner via the inner conductor part, and in the plugged-in state, the inner sleeve with its free end facing the outer sleeve being spaced at a distance from the outer sleeve in the axial direction. 
         [0003]    By means of such coaxial connector arrangements, an electrical connection can be established between a first coaxial cable and a second coaxial cable. In the same manner, an electrical connection can also be established between a coaxial cable and another electrical assembly. An end region of the coaxial cable with its inner conductor, which forms a contact pin, can be passed through the first through opening, and the inner conductor of another coaxial cable, which likewise forms a contact pin, can be correspondingly passed through the second through opening. The two contact pins may customarily be inserted into recesses in the inner conductor part, and may be electrically connected to one another via this inner conductor part. The outer conductors of the two coaxial cables can be electrically connected to the inner sleeve and the outer sleeve, respectively, for example by means of a solder joint, and the inner sleeve can subsequently be plugged into the outer sleeve so that the outer conductors of the coaxial cables are also connected to one another in an electrically conductive manner via the two sleeves. The sleeves thus form two outer conductor parts of the coaxial plug connector arrangements. 
         [0004]    Coaxial plug connector arrangements of this kind are known to the person skilled in the art. It is important for the operating characteristics of the coaxial plug connector arrangements that preferably no passive intermodulation (PIM) occurs; that is, there is preferably no mutual interference of electric signals that are transmitted at different frequencies via the coaxial plug connector arrangements. The passive intermodulation is influenced, among other things, by the stability of the mechanical connection of the inner sleeve to the outer sleeve. It is therefore proposed in DE 10 2011 056 466 A1 to dispose the inner sleeve in the plugged-in state at an axial distance from the outer sleeve, and to provide electrical contacting between the inner sleeve and the outer sleeve only in the radial direction, namely, on the one hand via an annular bead disposed at the free end of the inner sleeve, and on the other hand via a radial widening of the inner sleeve disposed at a distance from the annular bead. The radial widening at the same time is used for establishing a detent connection between the inner sleeve and the outer sleeve, in that an annular groove is disposed in the region of the radial widening, into which a ring-shaped detent projection of the outer sleeve extends. 
         [0005]    It is an object of the present invention to improve a coaxial plug connector arrangement of the kind stated at the outset, in such a manner that it has particularly low passive intermodulation. 
       SUMMARY OF THE INVENTION 
       [0006]    For a coaxial plug connector arrangement of the generic kind, this object is achieved in that the inner sleeve rests in an electrically conductive manner against a single contact area of the outer sleeve, the contact area being disposed on an inner side of the outer sleeve and surrounding the inner sleeve in the circumferential direction, and the free end of the outer sleeve facing the inner sleeve being fixed via a second insulating part to the inner sleeve in an axially and radially immovable manner. 
         [0007]    In the coaxial plug connector arrangement according to the invention, the inner sleeve extends into the outer sleeve, the inner sleeve contacting the outer sleeve only at a single contact area. This contact area surrounds the inner sleeve in the circumferential direction so that the inner sleeve contacts the outer sleeve in the radial direction. There is no axial contacting of the inner sleeve with the outer sleeve. With the exception of the contact area surrounding the inner sleeve in the circumferential direction, the inner sleeve contacts the outer sleeve in no other region. To avoid an axial or radial movement of the outer sleeve relative to the inner sleeve, a second insulating part is used via which the free end of the outer sleeve facing the inner sleeve is fixed to the inner sleeve in an electrically insulating manner. The fixing of the outer sleeve to the inner sleeve is thus carried out via an electrically insulating part which only ensures mechanical arresting of the outer sleeve on the inner sleeve, but prevents an electrically conductive connection of the outer sleeve to the inner sleeve in the region of the free end of the outer sleeve. 
         [0008]    The coaxial plug connector arrangement according to the invention is characterized by extremely low passive intermodulation, and at the same time, by high mechanical stability. 
         [0009]    The contact area extending over the outer periphery of the inner sleeve is advantageously configured as a cylindrical wall portion of the outer sleeve. 
         [0010]    In an advantageous embodiment of the invention, a wall portion of the outer sleeve that conically widens toward the free end of the outer sleeve is connected to the cylindrical wall portion of the outer sleeve, the inner sleeve extending into the conically widening wall portion, and the conically widening wall portion and the inner sleeve defining an annular chamber between them. 
         [0011]    A cylindrical end portion may adjoin the conically widening wall portion of the outer sleeve in the direction of the free end of the outer sleeve. 
         [0012]    In an advantageous embodiment of the invention, the outer sleeve has a rigid design, so that it cannot be deformed in the radial direction during assembly of the coaxial plug connector. 
         [0013]    As already mentioned, radial and axial fixing of the outer sleeve to the inner sleeve is carried out by means of the second insulating part. It is advantageous if the outer sleeve is non-rotatably held on the inner sleeve by means of the second insulating part. In such an embodiment of the invention, in the assembled state of the coaxial plug connector, the outer sleeve cannot be moved relative to the inner sleeve in the radial or the axial direction, and a rotational movement of the outer sleeve relative to the inner sleeve is not possible. Corresponding movements are reliably prevented by providing the second insulating part. 
         [0014]    The second insulating part advantageously extends over the outer periphery of the inner sleeve and the outer sleeve. It can in particular be provided that the second insulating part completely surrounds the inner sleeve and the outer sleeve in the region adjacent to the free end of the outer sleeve. 
         [0015]    On its rear side facing away from the outer sleeve, the inner sleeve advantageously has a collar which protrudes beyond the second insulating part in the axial direction, and which accommodates an end region of a coaxial cable. 
         [0016]    On its rear side facing away from the inner sleeve, the outer sleeve preferably has a collar which protrudes beyond the second insulating part and which likewise accommodates an end region of a coaxial cable. 
         [0017]    The collar-shaped end region of the inner sleeve and/or the collar-shaped end region of the outer sleeve can have a receiving chamber in which a solder preform can be positioned for soldering the coaxial cable to the corresponding sleeve. 
         [0018]    In an advantageous embodiment of the invention, the second insulating part can be press-fitted to the outer sleeve and to the inner sleeve. The press-fit connection of the second insulating part to the outer sleeve on the one hand, and to the inner sleeve on the other hand, allows a mechanically durable fixation of the outer sleeve on the inner sleeve via the second insulating part, using a simple design. 
         [0019]    It is advantageous if the second insulating part forms a clamping sleeve into which the outer sleeve and the inner sleeve can be pressed. 
         [0020]    The clamping sleeve can advantageously be pressed onto the outer sleeve and onto the inner sleeve in the axial direction. This makes it possible to slip the clamping sleeve onto a coaxial cable prior to assembling the coaxial plug connector arrangement, to subsequently connect the coaxial cable, via the two sleeves, and the inner conductor, in an electrically conductive manner, to a second coaxial cable or another electrical module that has a contact pin, the inner sleeve being plugged into the outer sleeve, and to subsequently press the clamping sleeve onto the inner sleeve and the outer sleeve in the axial direction in order to thus axially and radially fix the outer sleeve to the inner sleeve via the clamping sleeve. 
         [0021]    It is advantageous when the second insulating part can be detachably connected to the outer sleeve and/or the inner sleeve. This allows the connection between the outer sleeve and the inner sleeve to be disconnected once again, if needed. 
         [0022]    In an advantageous embodiment, the second insulating part can be detachably locked to the outer sleeve and/or the inner sleeve. 
         [0023]    It can be provided that the second insulating part can be screwed to the outer sleeve and/or the inner sleeve. 
         [0024]    It is advantageous when the second insulating part can be detachably connected to the outer sleeve and/or the inner sleeve without a tool. This allows particularly simple handling of the coaxial plug connector arrangement. 
         [0025]    As already mentioned, in the plugged-in state the inner sleeve with its free end facing the outer sleeve is spaced at a distance from the outer sleeve in the axial direction. To reliably avoid unintentional contacting of the inner sleeve with the outer sleeve, it is advantageous when, in the plugged-in state of the inner sleeve, the first insulating part rests against the outer sleeve with a front stop surface which protrudes beyond the free end of the inner sleeve in the axial direction. This ensures that during insertion of the inner sleeve into the outer sleeve, the first insulating part, which is fixed to the inner sleeve and protrudes beyond the free end of the inner sleeve in the axial direction, abuts against the outer sleeve, for example at a bottom wall of the outer sleeve, even before the free end of the inner sleeve can contact the outer sleeve in the axial direction. 
         [0026]    It is particular advantageous when the outer sleeve can be acted on with an axial tensile force in the direction of the first insulating part by means of the second insulating part. In such a configuration, the second insulating part thus pulls the outer sleeve against the front stop surface of the first insulating part. 
         [0027]    The first insulating part can rest against the inner sleeve, preferably on a bottom wall of the inner sleeve, with a rear stop surface which faces away from the outer sleeve. In such a configuration, the first insulating part is clamped between the inner sleeve and the outer sleeve under the action of an axial tension force of the second insulating part. This increases the mechanical durability of the coaxial plug connector arrangement. 
         [0028]    The second insulating part can advantageously be placed against a radially oriented step of the outer sleeve and/or the inner sleeve. For example, it can be provided that the inner sleeve has a radially outwardly facing step against which the second insulating part can be placed. The radially outwardly facing step thus forms a stop surface for the second insulating part. 
         [0029]    It is particularly advantageous when the second insulating part has a spacer element that can be inserted between the free end of the outer sleeve and the inner sleeve. The spacer element thus occupies a position between the free end of the outer sleeve and the inner sleeve, and thereby ensures that the outer sleeve cannot unintentionally directly contact the inner sleeve in this region. 
         [0030]    The spacer element is advantageously formed as an annular collar that is surrounded by a sheath of the second insulating part, forming an annular chamber, it being possible to press a free end portion of the outer sleeve into the annular chamber in the axial direction, and to press a portion of the inner sleeve into the collar. The collar can be placed against the inner sleeve under plastic and/or elastic deformation, and at the same time the sheath can be placed against the outer sleeve under elastic and/or plastic deformation, the outer sleeve extending with a free end portion into the annular chamber between the sheath and the collar. This results in particularly high mechanical durability of the coaxial plug connector arrangement, it being possible to fix the outer sleeve to the inner sleeve using a simple design, and at the same time to ensure that the outer sleeve electrically contacts the inner sleeve only in a contact area that extends over the outer periphery of the inner sleeve. 
         [0031]    The second insulating part preferably has a rigid clamping portion which surrounds the outer sleeve and the inner sleeve in the circumferential direction, and which in the axial direction is adjoined by an elastically deformable connecting portion for establishing a detachable connection to the outer sleeve. The rigid clamping portion ensures that the outer sleeve can be fixed to the inner sleeve in an axially and radially immovable manner, and the connecting portion adjoining the clamping portion the axial direction allows a detachable connection of the second insulating part to the outer sleeve, using a simple design. 
         [0032]    The connecting portion advantageously has a plurality of flexible tongues that are elastically deformable in the radial direction. 
         [0033]    Such flexible tongues are particularly advantageous in providing a detent connection between the second insulating part and the outer sleeve. For this purpose, it can be provided that the flexible tongues each carry a first detent element at their free end which interacts with a detent element of the outer sleeve having a complementary configuration. 
         [0034]    In its end region facing away from the inner sleeve, the outer sleeve advantageously carries detent toothing on the outer side which interacts with the detent teeth of the second insulating part having a complementary configuration. 
         [0035]    The first insulating part and the second insulating part are preferably made of the same plastics material, for example a polytetrafluoroethylene material. 
         [0036]    The following description of two preferred embodiments of the invention provides more detailed explanation, with reference to the drawing. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0037]      FIG. 1  shows a schematic cross-sectional view of a first embodiment of a coaxial plug connector arrangement for establishing an electrical and mechanical connection between two coaxial cables; 
           [0038]      FIG. 2 : shows a perspective illustration of the coaxial plug connector arrangement from  FIG. 1 ; 
           [0039]      FIG. 3  shows a perspective, partially separated illustration of the coaxial plug connector arrangement from  FIG. 1 , in the manner of an exploded drawing, and 
           [0040]      FIG. 4  shows a schematic sectional view of a second embodiment of a coaxial plug connector arrangement for establishing an electrical and mechanical connection between two coaxial cables. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0041]      FIGS. 1 to 3  schematically illustrate a first embodiment of a coaxial plug connector arrangement according to the invention, designated overall by reference numeral  10 . The coaxial plug connector arrangement  10  comprises an outer sleeve  12  to which a first coaxial cable  14  is connected, and an inner sleeve  16  to which a second coaxial cable  18  is connected. The two coaxial cables  14 ,  18  can be electrically and mechanically connected to one another and disconnected from one another, if needed, by means of the coaxial plug connector arrangement  10 . 
         [0042]    The first coaxial cable  14  customarily includes an inner conductor  20  and an outer conductor  22 , between which a dielectric  24  is situated. The second coaxial cable  18  includes an inner conductor  26  and an outer conductor  28 , between which a dielectric  30  is situated. 
         [0043]    On its rear side facing away from the inner sleeve  16 , the outer sleeve  12  has a collar-shaped first sleeve portion  32  that transitions via a radially outwardly directed step  34  into a second sleeve portion  36  which on its outer side carries detent toothing  38  adjacent to the step  34 . The detent toothing  38  extends over the complete outer periphery of the second sleeve portion  36 . 
         [0044]    Axially in the direction of the inner sleeve  16 , offset with respect to the step  34 , the outer sleeve  12  has a radially inwardly facing inner shoulder  40 , which on the inner side of the second sleeve portion  36  is adjoined by a circular cylindrical rear wall portion  42  at the level of the detent toothing  34 , the rear wall portion transitioning into a circular cylindrical front wall portion  46  via a conically widening middle portion  44 . This is also apparent in particular from  FIG. 3 . 
         [0045]    The first coaxial cable  14  together with the exposed outer conductor  22  can be inserted into the collar-shaped first sleeve portion  32  until the outer conductor  22  and the dielectric  24  come into contact with the inner shoulder  40 . The exposed inner conductor  20  of the first coaxial cable  14  forms a contact pin that extends into the interior of the outer sleeve  12  which is surrounded by the second sleeve portion  36 . 
         [0046]    On its rear side facing away from the outer sleeve  12 , the inner sleeve  16  has a collar-shaped first sleeve portion  48  that transitions into a second sleeve portion  52  via a radially outwardly directed step  50 . An inner shoulder  54  protrudes radially inwardly in the transition region between the first sleeve portion  48  and the second sleeve portion  52 . 
         [0047]    The second sleeve portion  52  surrounds a first insulating part  56  that has a central through hole in which an electrically conductive inner conductor part  58  is situated. The inner conductor part  58  has a first blind hole-like recess  60  that faces the first coaxial cable  14 , and the inner conductor part  58  has a blind hole-like second recess  62  that faces the second coaxial cable  18 . 
         [0048]    The second coaxial cable  18  together with the exposed outer conductor  28  can be inserted into the first sleeve portion  48  of the inner sleeve  16  until the outer conductor  28  and the dielectric  30  come into contact with the inner shoulder  54 . The exposed inner conductor  26  of the second coaxial cable  18  forms a contact pin that can extend into the second recess  62  of the inner conductor part, thereby establishing an electrical and mechanical connection to the inner conductor  58 . 
         [0049]    It can be provided that a receptacle for a solder preform is situated in the region of the second recess  62  so that the inner conductor  26  of the second coaxial cable  18 , after the inner conductor has been inserted into the second recess  62 , can be soldered to the inner conductor part  58  under the action of heat. 
         [0050]    The second sleeve portion  52  of the inner sleeve  16  has a cylindrical holding portion  64  which directly adjoins the step  50  in the direction facing away from the first sleeve portion  48 . A connecting portion  66  adjoins the holding portion  64  in the direction facing away from the first sleeve portion  48 , and conically narrows toward the free end  68  of the inner sleeve  16 , forming a plurality of flexible tongues  70  that are elastically deformable in the radial direction. 
         [0051]    In the plugged-in state, the free end  68  of the inner sleeve  16  occupies a position at the level of the circular cylindrical rear wall portion  42  of the outer sleeve  12 . In this region, the inner sleeve  16  has an annular bead  72  which extends over the outer periphery of the inner sleeve  16  and which is formed by individual annular bead portions  74 , each being situated on a flexible tongue  70 . 
         [0052]    As is apparent in particular from  FIG. 1 , the first insulating part  56  protrudes beyond the free end  68  of the inner sleeve  16  in the axial direction. In the plugged-in state, the first insulating part  56  rests with a front stop surface  76  against the inner shoulder  40  of the outer sleeve  12 . Correspondingly, a rear stop surface  78  of the first insulating part  56  facing the second coaxial cable  18  rests against the inner shoulder  54  of the inner sleeve  14 . 
         [0053]    The first insulating part  56 , which protrudes beyond the free end  68  of the inner sleeve  16 , ensures that in the plugged-in state the inner sleeve  16  can electrically contact the outer sleeve  12  only in the region of the cylindrical rear wall portion  42 , but that electrical contacting in the axial direction is prevented. 
         [0054]    In the plugged-in state, a first annular chamber  80  extends between the connecting portion  66  of the inner sleeve  16  and the middle portion  44  of the outer sleeve  12 , and a second annular chamber  82  extends in the region between the holding portion  64  of the inner sleeve  16  and the circular cylindrical front wall portion  46  of the outer sleeve  12 . 
         [0055]    Fixing the outer sleeve  12  to the inner sleeve  16  in the coaxial plug connector arrangement  10  illustrated in  FIGS. 1 to 3  is carried out by means of a second insulating part  84  that is made of the same plastics material as the first insulating part  56 , preferably a polytetrafluoroethylene material. 
         [0056]    The second insulating part  84  is provided in the form of a clamping sleeve  86  that has a base  88  with a central opening  90 . The outer periphery of the base  88  is adjoined in the axial direction by a sheath  92  which in its end region facing the detent toothing  38  of the outer sleeve  12  is formed by a multiplicity of flexible tongues  94 . At the level of the holding portion  64  of the inner sleeve  16 , the sheath  92  in combination with the base  88  forms a clamping part  96  which, in addition to the end portion of the sheath  92  facing the base  88  and the base  88 , has a collar  98  which protrudes from the base  88  in the axial direction and is surrounded by the sheath  92 . An annular chamber  100  extends between the collar  98  and the sheath  92 . 
         [0057]    For establishing a mechanical and electrical connection of the first coaxial cable  14  to the second coaxial cable  18 , in first instance the first coaxial cable  14  can be soldered to the outer sleeve  12 , the inner conductor  20  of the first coaxial cable  14  extending into the interior of the outer sleeve  12 . 
         [0058]    Correspondingly, the second coaxial cable  18  can be soldered to the inner sleeve  16 , whereby the inner conductor  26  of the second coaxial cable  18  extends into the second recess  62  of the inner conductor part  58  and can be soldered thereto. The inner sleeve  16  can be subsequently plugged into the outer sleeve  12 , the inner conductor  26  of the first coaxial cable  14  extending into the first recess  60  in the inner conductor part  58 . The inner conductor  20  of the first coaxial cable  14  can also be soldered to the inner conductor part  58  by means of a suitable solder deposit. 
         [0059]    To subsequently fix the outer sleeve  12  to the inner sleeve  16  in an axially and radially immovable manner, in a further assembly step the clamping sleeve  86 , which has been attached to the second coaxial cable  18  beforehand, can be moved far enough in the axial direction that the collar  98  of the clamping part  96  extends into the second annular chamber  82  between the holding portion  64  of the inner sleeve  16  and the circular cylindrical front wall portion  46  of the outer sleeve  12 , at the same time the sheath  92  surrounding the second sleeve portion  36  of the outer sleeve  12  and locking with the outer sleeve  12 . For this purpose, the flexible tongues  94  of the sheath  92  carry detent projections  102  on their inner side facing the outer sleeve  12 , which interact with the detent toothing  38  for establishing a detent connection. 
         [0060]    The clamping sleeve  86  is pressed with its collar  98  onto the holding portion  64  of the inner sleeve  16 , and the sheath  92  is pressed onto the outer sleeve  12  in the region of the clamping part  96 . The clamping sleeve  86  thus rests against the radially outwardly directed step  50  of the inner sleeve  16  in the region of the base  88 , and exerts an axially directed tensile force on the outer sleeve  12  in the direction of the inner sleeve  16 . As a result, the first insulating part  56  is clamped with its stop surfaces  76  and  78  between the outer sleeve  12  and the inner sleeve  16 . 
         [0061]    Due to providing the clamping sleeve  86 , the outer sleeve  12  is held against the inner sleeve  16  in an axially and radially immovable manner, and a rotational movement of the outer sleeve  12  about the inner sleeve  16  is also reliably prevented by means of the clamping sleeve  86 . 
         [0062]    The electrical and mechanical contacting of the inner sleeve  16  with the outer sleeve  12  takes place only in the region of the annular bead  72 , which contacts the circular cylindrical rear wall portion  42  in the radial direction. The circular cylindrical rear wall portion  42  forms the sole contact area of the outer sleeve  12  against which the inner sleeve  16  rests in an electrically conductive manner. In combination with the axial and radial and non-rotatable fixation of the outer sleeve  12  on the inner sleeve  16 , this ensures that practically no passive intermodulation occurs in the coaxial plug connector arrangement  10 . The coaxial plug connector arrangement  10  is thus characterized by very good electrical transmission properties. 
         [0063]      FIG. 4  schematically illustrates a second advantageous embodiment of a coaxial plug connector arrangement according to the invention, designated overall by reference numeral  110 . The coaxial plug connector arrangement  110  is largely identical to the coaxial plug connector arrangement  10  explained above with reference to  FIGS. 1 to 3 . Thus, for identical components, the same reference numerals are used in  FIG. 4  as in  FIGS. 1 to 3 , and reference is made to the above explanations in order to avoid repetition with regard to these components. 
         [0064]    The coaxial plug connector arrangement  110  illustrated in  FIG. 4  differs from the coaxial plug connector arrangement  10  in that, instead of the second insulating part  84  which has a collar, a second insulating part  114  is used which forms a clamping sleeve  116  without such a collar. The clamping sleeve  116  has a base  118  whose outer periphery is adjoined by a sheath  120  in the axial direction. Analogously to the sheath  92  of the clamping sleeve  84 , the sheath  120  of the clamping sleeve  116  also has a plurality of flexible tongues  122  that carry detent projections  124  at their free ends, facing the outer sleeve  12 . 
         [0065]    Another difference between the above-explained second insulating part  84  and the second insulating part  114  illustrated in  FIG. 4  is that the base  118  of the clamping sleeve  116  has a central opening  126 , the diameter of which is smaller than the diameter of the opening  90  of the clamping sleeve  86 . The diameter of the opening  126  is selected such that in the region of the base  118 , the clamping sleeve  116  can be clamped to the first sleeve portion  48  of the inner sleeve  16 . 
         [0066]    In contrast to the clamping sleeve  86 , the clamping sleeve  116  has no collar. However, during mounting of the clamping sleeve  116  on the outer sleeve  12 , the sheath  120  is clamped to the outer sleeve  12  so that for the clamping sleeve  116 , on the one hand a clamping connection with the outer sleeve  12 , and on the other hand a clamping connection with the inner sleeve  16 , are ensured. For the coaxial plug connector arrangement  110  as well, these clamping connections allow the outer sleeve  12  to be fixed to the inner sleeve  16  so as to be immovable in the axial and radial directions, a rotational movement of the outer sleeve  12  relative to the inner sleeve  16  also being prevented by means of the clamping sleeve  116 . 
         [0067]    The coaxial plug connector arrangement  110  as well is characterized by extremely low passive intermodulation, and can be produced in a cost-effective manner.