EP1849208B1 - Coaxial hf plug-in connector - Google Patents

Abstract

The HF plug connector has an axial bore (21) in outer conductor (3) at the connection side (8) including an electrical structural element. The connector consists of a decoupling branch (sic) (23), which includes an HF internal conductor (27), inner dielectric (35), seal connection (31) and outer dielectric (37).

Description

The invention relates to a coaxial RF connector according to the preamble of claim 1.

Coaxial RF connectors are widely used in electrical engineering. A common application is the use of such coaxial connector as an interface to housings for the connection of coaxial cables on which high-frequency (RF) signals are transmitted.

In many applications, not only high-frequency useful signals but also low-frequency control signals and / or a DC voltage, for example also for the power supply of the devices connected thereto and connected, are transmitted via the same coaxial lines. One of these applications is, for example, the power supply of headends, satellite receivers etc.

Therefore, it is known to provide corresponding branching devices in the transmission path, via which the high-frequency useful signals (HF signals) from a DC voltage component or a low-frequency control signal (AF signal) can be separated. Often, this is done by the interposition of capacitors or capacitor devices, over which the high frequency useful signals can be transmitted while the DC component and / or the low-frequency control signals are coupled out.

For such a device but additional modules are required, which are usually housed in a separate housing or in a separate chamber in a housing of a downstream, the signal processing device integrated with integrated.

A generic coaxial connector is for example from the US 4,575,694 known. In a known RF connector from a bore in the outer conductor material is provided to provide here a switchable termination impedance.

From the EP 0 129 820 A2 Furthermore, a coupling element for connecting a signal transmission device to a coaxial main line can be taken as known. It is a capacitive coupling element for connecting a signal transmission device to a coaxial main line. In this case, a coaxial tap using a coaxial segment of the outer conductor is provided.

Finally, out of the DE 102 08 402 A1 basically to be understood that electrical components can also be arranged in a dielectric.

The object of the present invention is therefore to provide a to provide improved coaxial RF connector, which allows a compact extraction low-frequency control signals and / or DC components of a high-frequency useful signal.

The object is achieved according to the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims.

The solution according to the invention is characterized by its compactness and by its variable use.

In accordance with the invention, it is now provided that the corresponding separating device is accommodated in the coaxial plug connector itself for separating high-frequency useful signals from low-frequency control signals and / or a remote supply voltage (DC voltage component).

The coaxial connector has the connection side as conventional coaxial connector also, an outer conductor and an inner conductor held separately by a dielectric. In addition, however, the contact plug connector according to the invention now comprises a branch circuit with an RF inner conductor, on which the radio-frequency signals continue to be transmitted, and a LF inner conductor, on which the low-frequency control signals and / or the DC voltage component for the optionally required remote supply voltage is coupled out.

According to the invention, this is done by a λ / 4 locking pot.

In a particularly preferred embodiment, this locking pot is housed in a corresponding bore in the connector outer conductor, whereby a further improvement in the RF signal attenuation is realized.

It has proven to be advantageous to implement the branch circuit so that the RF inner conductor and the NF inner conductor parallel to each other. But also an at least slightly divergent orientation is possible, the angle should preferably have less than ± 10 °, in particular less than ± 5 ° between the two branch lines.

According to the present invention, the RF signal conductor is preferably continued in the axial extension of the connector inner conductor and the NF inner conductor is arranged as a branch line with radial offset to the RF signal conductor on the output side in the coaxial connector. In principle, however, a reverse configuration is possible. Finally, it is in principle even conceivable that the branch circuit is formed so that the two preferably parallel to each other line branches for the RF and the NF signals both come to lie with radial offset to the connector side coaxial inner conductor.

The entire arrangement can be designed such that the preassembled plug connector inner conductor with attached dielectric and the branching arrangement consisting of the RF inner conductor and the NF inner conductor with the associated locking pot can be inserted and mounted from the plug side into the outer conductor. The whole Arrangement can also be designed and designed such that a corresponding mounting from the opposite side is possible or that the assembly of the connector components takes place on both sides.

Depending on the specific application, it is also possible in a preferred embodiment of the invention to use a plurality of locking pots of different lengths in the connector. As a result, an adaptation to the respectively to be transmitted RF frequency range and the desired blocking effect and damping can be made.

From the description of the invention it follows that by eliminating a special housing or a special chamber in a housing and by accommodating the branching device including the associated damping device in the connector a considerable space saving can be realized. It is particularly surprising that this ultimately does not lead to an enlargement or relevant enlargement of the connector or must lead. In addition, the connector according to the invention is extremely inexpensive to produce, since in contrast to conventional connectors only in the outer conductor an additional hole is necessary.

Figur 1:

eine schematische axiale Querschnittsdarstellung durch einen erfindungsgemäßen Koaxialverbinder;

Figur 2:

eine vergrößerte Detaildarstellung des Sperrtopfes für den NF-Signal-Auskopplungszweig;

Figur 3a:

eine schematische perspektivische Darstellung des Steckverbinder-Innenleiters, der in den HF-Innenleiter übergeht;

Figur 3b:

eine entsprechende Darstellung zu Figur 3a, wobei in der Darstellung gemäß 3b noch der den Innenleiter gegenüber dem Außenleiter haltende als Dielektrikum ausgebildete Abstandshalter sowie der NF-Innenleiter mit Sperrtopf vormontiert ist;

Figur 4a:

eine zu Figur 1 entsprechende verkleinerte Schnittdarstellung ohne ausgangsseitig an dem HF-Innenleiter angeschlossenes Koaxialkabel;

Figur 4b:

eine perspektivische Darstellung des erfindungsgemäßen Koaxialverbinders mit Blick auf die Steckerseite;

Figur 4c:

eine weitere perspektivische Darstellung des in den Figuren 4a und 4b gezeigten erfindungsgemäßen Steckverbinders mit Blick auf die rückwärtige Verzweigungsseite;

Figur 5:

eine zu Figur 1 im Axialschnitt wiedergegebene Darstellung des erfindungsgemäßen Koaxialsteckverbinders der an der Außenwand eines Elektrogerätes angeschlossen ist;

Figur 6:

eine zu Figur 5 leicht abgewandelte Schnittdarstellung eines zum Anschluss an einer Gehäusewand geeigneten Koaxialsteckverbinders im Axialschnitt, bei dem HF- und NF-Innenleiter(9 bzw. 27) in das Gehäuse geführt werden.

Figur 6a:

eine verkleinerte Axialschnittdarstellung entsprechend Figur 6, jedoch ohne eingesetzten Innenleiter;

Figur 6b:

eine perspektivische Darstellung des in Figur 6a gezeigten Außenleiters mit Blick auf die Steckseite;

Figur 6c:

eine entsprechende perspektivische Darstellung des in den Figuren 6a und 6b gezeigten Außenleiters mit Blick auf die rückwärtige Anschlussseite; und

Figur 7:

ein erfindungsgemäßer Koaxialsteckverbinder, der gegenüber der Darstellung nach Figur 1 eine Auskoppeleinheit (23) mit größerem Außendurchmesser aufweist.

Further advantages, details and features of the invention will become apparent hereinafter from the embodiments illustrated with reference to drawings. In detail:

FIG. 1:

a schematic axial cross-sectional view through a coaxial connector according to the invention;

FIG. 2:

an enlarged detail of the locking pot for the LF signal extraction branch;

FIG. 3a:

a schematic perspective view of the connector inner conductor, which merges into the RF inner conductor;

FIG. 3b:

a corresponding representation too FIG. 3a , wherein in the illustration according to FIG. 3b, the spacer, which is formed as a dielectric and holds the inner conductor relative to the outer conductor, and the LF inner conductor with blocking pot are also pre-assembled;

FIG. 4a

one too FIG. 1 corresponding reduced sectional view without the output side connected to the RF inner conductor coaxial cable;

FIG. 4b:

a perspective view of the coaxial connector according to the invention with a view of the connector side;

FIG. 4c:

another perspective view of the in the FIGS. 4a and 4b shown connector according to the invention with a view of the rear branch side;

FIG. 5:

one too FIG. 1 in axial section reproduced representation of the coaxial connector according to the invention on the outer wall an electrical appliance is connected;

FIG. 6:

one too FIG. 5 Slightly modified sectional view of a suitable for connection to a housing wall coaxial connector in axial section, are guided in the RF and NF inner conductor (9 or 27) in the housing.

FIG. 6a:

a reduced Axialschnittdarstellung accordingly FIG. 6 , but without inserted inner conductor;

FIG. 6b:

a perspective view of the in FIG. 6a outer conductor shown with a view of the mating side;

FIG. 6c:

a corresponding perspective view of the in the Figures 6a and 6b outer conductor shown with a view of the rear connection side; and

FIG. 7:

a coaxial connector according to the invention, compared to the illustration according to FIG. 1 a decoupling unit (23) having a larger outer diameter.

The following will be on FIG. 1 Reference is made, in which in axial cross section a first embodiment is shown.

In FIG. 1 is a coaxial connector in axial section 1, which has a connector outer conductor 3 and plug connection side (ie in FIG. 1 lying on the left) coaxially in a known manner comprises a connector inner conductor 5, which is held via an insulator, in the illustrated embodiment, a disk-shaped dielectric 7 in the outer conductor 3 while avoiding an electrical-galvanic contact between the inner and outer conductors.

In the illustrated embodiment, the connector inner conductor plug connector side has a socket-shaped extension 5 '. Likewise, however, a pin-shaped inner conductor connection can also be provided at this point.

The coaxial connector formed in this way is preferably standardized on its coaxial connection side 8, for example as a 7/16 connector according to EN 122 190.

In the exemplary embodiment shown, the standardized region on the connection side 8 in the axial extension of the plug connector inner conductor 5 then merges into an RF inner conductor 9, specifically via a tapered intermediate section 5 ".

From the embodiment shown, it can be seen that the located on the plug side central opening or bore 12a, in which the socket-shaped extension 5 'of the coaxial connector is arranged, via a conical or frusto-conical tapered intermediate bore 12b merges into an outlet-side axial bore 12c, in Which of the RF inner conductor 9 comes to rest at a distance from the wall of the connector outer conductor 3.

The transitions from connector inner conductor 5 to RF inner conductor 9 and from bore 12a to bore 12c need not be continuous as in the embodiment. There are also sudden diameter changes between the sections possible.

In the exemplary embodiment shown, the RF inner conductor 9 terminates in front of the end-side outer conductor end 10, where a coaxial connecting cable 13 which forwards the HF signals (high-frequency signals) is connected via a radial bore 15 in the plug connector outer conductor 3 in the radial direction. For this purpose, the coaxial connection cable 13 is correspondingly stepped stripped at its terminal end, the associated inner conductor 13 a passed through a preferably groove-like outbreak in the RF inner conductor 9 and soldered to it. The dielectric 13c surrounding the inner conductor 13a insulates the inner conductor from the outer conductor of the connector and is inserted into the radial bore 15 for this purpose. The stepped outer conductor 13b is the front side of the sleeve-shaped connection portion 17, which is part of the connector outer conductor 3, the front side and / or electrically contacted at the peripheral portion. 13d, the outer insulation of the coaxial connection cable 13 is shown.

About the connector inner conductor 5 and thus on the belonging to the connector inner conductor 5 RF inner conductor 9 so high-frequency signals (RF signals) from the coaxial terminal side 8 on the output side to the connected coaxial cable 13 forwarded.

If a coaxial cable is now connected to the coaxial connector of this type on the connection side, via which not only RF signals (ie high-frequency useful signals), but also LF signals (for example, low-frequency control signals and / or a remote supply voltage or DC voltage) are transmitted, they should be coupled out by means of the coaxial connector according to the invention via a decoupling branch. This means that the decoupling in the decoupling branch for the frequency range of the RF signal should be as large as possible.

In the embodiment shown, a further bore 21 is parallel to the outlet-side axial bore 12c (with a smaller diameter than the inlet-side axial bore 12a) then introduced in the material of the connector outer conductor 3, in which the mentioned Auskoppelzweig 23 is housed, the NF-inner conductor 27, Inner dielectric 35, barrier pot 31 and outer dielectric 37 is made. In this case, the LF inner conductor is subdivided into a radial section 27a and an axial section 27b, which runs parallel to the RF inner conductor 9 in the exemplary embodiment shown.

As is apparent from the schematic representation according to FIG. 1 but also from the below discussed perspective view according to the FIGS. 3a and 3b shows, in the RF inner conductor 9 - if necessary, but also in the transition piece 5 "or even further to the terminal end of the connector inner conductor 5 back - a radial bore 24a ( FIGS. 3a and 3b ) is provided, in which the radial portion 27 a of the NF inner conductor 27 inserted, electrically contacted and optionally additionally soldered.

On the axial portion 27b of the NF inner conductor 27 is a locking pot 31 is provided. The NF inner conductor 27 of the Auskoppelzweiges 23 is soldered to the bottom 31 b of the locking pot 31, and at the solder joint 34. The corresponding ratios are in an enlarged detail in FIG FIG. 2 played.

wobei ε_r die entsprechende Dielektrizitätskonstante des verwendeten Innendielektrikums 35 und λ die mittlere Wellenlänge des in dem HF-Zweig zu übertragenden Frequenzbereiches ist, vorzugsweise die mittlere Wellenlänge dieses Frequenzbereiches, so wird der hierdurch gebildete Kurzschluss im Inneren des mit Kunststoff oder allgemein mit einem Dielektrikum 35 gefüllten Sperrtopfes an das offene Ende des Sperrtopfes in einen Leerlauf transformiert (λ/4 elektrische Länge). Dieser Leerlauf an der offenen Seite 31c des Sperrtopfes 31 ist sehr nahe an der Abzweigstelle 24 des Auskoppelzweiges 23 vorgesehen und bewirkt dadurch, dass das HF-Signal nicht in den Auskoppelzweig 23, sondern in den HF-Zweig und damit über den HF-Innenleiter 9 fließt.Is the length of the inner bore of the locking pot $$\mathit{L}=\frac{1}{\sqrt{\mathit{.epsilon..sub.R}}}\mathit{x}\frac{\mathit{\lambda }}{4}.$$

where ε _{r is} the corresponding dielectric constant of the inner dielectric 35 used and λ is the mean wavelength of the frequency range to be transmitted in the RF branch, preferably the average wavelength of this frequency range, the short circuit formed thereby becomes inside the plastic or generally with a dielectric 35th filled locking pot to the open end of the locking pot transformed into an open circuit (λ / 4 electrical length). This idling on the open side 31c of the Sperrtopfes 31 is provided very close to the branch point 24 of Auskoppelzweiges 23 and thereby causes the RF signal not in the Auskoppelzweig 23, but in the RF branch and thus via the RF inner conductor. 9 flows.

Instead of a dielectric 35 (inner dielectric 35) and of the dielectric 37 (outer dielectric 37), which often consists of plastic, a dielectric of a different material, but in principle, can also be used from air or the like.

In order to improve the attenuation for the RF signal in the NF-Auskoppelzweig 23 but still further, a very small distance between the outer circumferential surface of the locking pot and surrounding the locking pot adjacent wall 21 a of the bore 21 is also formed. This distance space between the outer or circumferential surface of the locking pot 31 and the adjacent inner wall 21a of the bore 21, in which the locking pot is seated, is filled in the illustrated embodiment by means of an insulator or dielectric 37, to safely avoid an electrical-galvanic connection.

This small distance between the outside of the locking pot and the housing (ie the outer conductor of the decoupling branch) causes the decoupling is increased again. The limit for the distance is limited only by the required dielectric strength (high voltage resistance between outer and inner conductor).

In the exemplary embodiment shown, the NF inner conductor therefore protrudes axially in the axial extension at the connection end 10 of the connector housing thus formed.

Manufacturing technology, the integrally connected to the RF inner conductor 9 connector inner conductor 5 as shown by FIG. 3a be attached to a disc-shaped dielectric 7. Subsequently, the radial LF inner conductor section 27a of the preassembled coupling-out unit 23 is inserted into the radial bore 24a in the HF inner conductor 9 (immediately adjacent to the dielectric 7) and soldered there in a jig such that the center distances between the RF and NF inner conductor section 9 and 27b and between outer conductor 3 and bore 21 match.

Since the radial dimensions including the outer circumference of the decoupling assembly 23 in the embodiment shown are not greater than the disk-shaped dielectric 7, the arrangement may be such that the thus prepared and in FIG. 3b unit shown in perspective including the decoupling branch 23 is inserted from the coaxial terminal side 8 forth in the connector outer conductor housing 3. Subsequently, only the mentioned end of the radially supplied connection cable 13 must be inserted at the radial connection section 17 and the associated inner conductor and outer conductor sections connected accordingly. The terminal-side outer conductor opening 3a can then be closed by an end cap 41. A corresponding coaxial connector 1 without the mentioned radially supplied connection cable 17 is in the FIG. 4a again in the axial section and in the Figures 4b and 4c reproduced in perspective view.

In FIG. 5 is one accordingly FIG. 1 explained coaxial connector connected to an electronics housing 43, wherein only the decoupled LF signals and an optionally provided DC voltage signal (remote supply voltage) via the LF inner conductor 27 are fed into the electronics housing, namely via a provided in the electronics housing 43 opening or bore 43 a. The inner conductor projection can be dimensioned so large that it extends to a housed in the electronics housing 43 printed circuit board 45 and, if necessary, this still penetrated in a bore 45 a and soldered there can be.

The RF signals are forwarded via the RF connection cable 13.

Based on FIG. 6 a different embodiment is shown.

In the embodiment according to FIG. 6 is also the RF inner conductor 9 is formed axially extended and is beyond the terminal end 10 of the connector outer conductor or outer conductor housing 3 via and is in this case also guided through a further bore 43b in the electronics housing 43, optionally in a second chamber 43 ", the is separated from a first chamber 43 'by a shielded wall 44, into which the NF inner conductor 27 leads in. If the housing 43 is produced by casting, in this embodiment, the outer conductor 3 can be completely or at least partially formed in the same manufacturing process at very low cost.

Also different in this embodiment is the formation of the connector outer conductor 3 at its connection end 10, which is provided here with a connection flange 3b.

In the FIGS. 6a to 6c the corresponding configuration of the outer conductor is shown, partially in axial section and partially in perspective view with the associated connection flange 3b, which is designed square in the embodiment shown and in the corners has four holes, about which screws can be screwed into the electrical housing (for attachment of the coaxial connector).

Finally, the show Figures 6b and 6c also that in addition to the central bore 12c in the axial offset not only for the Auskoppelzweig a further axial bore 21, but a second, also parallel bore 21b is provided. This allows, for example, to accommodate a second branch line, which is constructed like the first branch line 23 and coupled to the RF inner conductor 9. If a plurality of branch lines are provided, the associated blocking pots may also have different lengths to block different frequency ranges. Therefore, in principle even more than one locking pot or even more than two locking pots can be arranged.

Notwithstanding the embodiment shown, the locking pots or the branch line 27 need not always be arranged parallel to the RF inner conductor. Both lines can also diverge or at least slightly diverge. However, a divergent angle should, if possible, be less than 10 ', more preferably less than 9 ° or 5 °.

Finally, the construction could conversely also be designed so that the LF inner conductor 27 extends in the axial extension of the connector inner conductor 5 and the connector inner conductor 5 thus virtually merges into the LF inner conductor 27. In this case, the RF inner conductor 9 would then branch off with a first radial section from the LF inner conductor 27 and then pass into a preferably parallel section. This would almost translate the two into one FIG. 1 lead shown branches.

Finally, but also a Y-shaped branching would be possible in which no continuation is provided in the immediate axial extension of the connector inner conductor 5, but a two-time radial offset is realized, so that both the NF inner conductor and the RF inner conductor preferably parallel to come but with radial lateral offset to the connector inner conductor 5 to lie.

Below is still on the embodiment according to FIG. 7 which followed from that after FIG. 1 differs in that the decoupling device 23 has a larger outer diameter and that the locking pot from the central axial line 51 further outward, ie radially outward ends, so that the bore 21a is not completely aligned with the connection-side bore 12a, but in the middle Area forms a step paragraph 3d. This results in that the entire arrangement can not be completely prefabricated inserted from the connection side, but only in the form of the connector inner conductor 5 with the associated RF inner conductor 9, the dielectric 7 as a holding device and the corresponding pre-assembled LF inner conductor 27. Because the axially extending portion 27a of the NF inner conductor 27 comes to lie so that it can be inserted from the connection side through the hole 12a. Subsequently, inserted into the bore 21a from the opposite side of the locking pot with the inner dielectric and the plastic sheath and soldered at the end of the solder joint 34 of the NF inner conductor 27 to the bottom 31b of the locking pot 31.

This structure may be necessary if the decoupling unit a large characteristic impedance, which is determined by the ratio of inner diameter of the locking cup to outer diameter of the LF inner conductor, must have to achieve a high decoupling between RF and LF signals.

It can be seen from the exemplary embodiments that the outer conductor inner diameter and the inner conductor diameter decrease from the coaxial connection side towards the connection end, preferably with a constant characteristic impedance. The characteristic impedance does not have to be the same. Embodiments are also conceivable in which the outer conductor inner diameter and the inner conductor diameter remain the same. Furthermore, the invention can be implemented in such a way that, for example, both diameters or at least one of them increase from the coaxial connection side to the connection end.

As mentioned, the characteristic impedance does not necessarily have to remain the same over the entire length, since, for example, in intentional deviation from a desired characteristic impedance, other characteristic impedance values may also be important, for example. to be compensated from a standard range or caused by solder joints characteristic impedance deviations.

Claims (22)

1. Coaxial HF plug-in connector having a coaxial connection side (8), having an HF internal conductor (9) and having a hole (21) in the material of the external conductor (3), in which hole (21) an electric component is arranged, characterised in that

   - the component in the hole (21) is a decoupling branch (23)

   - the decoupling branch (23) comprises an LF internal conductor (27), an internal dielectric (35), a balun (31) having a balun base (31b) and an external dielectric (37),

   - the LF internal conductor (27) is connected to the balun base (31b) the balun base (31b) being located remote from the coaxial connection side (8), and in that

   - the LF internal conductor (27) at the open end of the balun (31) is electrically connected to the HF internal conductor (9) of the plug-in connector.
2. Coaxial HF plug-in connector according to Claim 1, characterised in that the length of the balun corresponds to λ/4 or (1/√εr)*λ/4, λ being a wavelength, preferably the central wavelength of the high frequency to be transmitted in the HF branch.
3. Coaxial HF plug-in connector according to either Claim 1 or Claim 2, characterised in that the HF internal conductor (9) and/or the LF internal conductor (27) is/are integrally connected to the plug-in connector internal conductor (5)
4. Coaxial HF plug-in connector according to either Claim 1 or Claim 2, characterised in that the HF internal conductor (9) and/or the LF internal conductor (27) is/are connected to the plug-in connector internal conductor (5) via a plug-in connection and/or to each other via a soldered connection.
5. Coaxial HF plug-in connector according to any one of Claims 1 to 4, characterised in that the HF internal conductor (9) is located in the axial extension of the plug-in connector internal conductor (5) and the LF internal conductor (27) is offset relative thereto.
6. Coaxial HF plug-in connector according to any one of Claims 1 to 4, characterised in that the LF internal conductor (27) is located in the axial extension of the plug-in connector internal conductor (5) and the HF internal conductor (9) is offset relative thereto.
7. Coaxial HF plug-in connector according to any one of Claims 1 to 6, characterised in that the LF internal conductor (27) comprises an axial portion (27b) and a radial portion (27a), the LF internal conductor (27) being electrically connected to the plug-in connector internal conductor or HF internal conductor (5, 9) via its radial portion.
8. Coaxial HF plug-in connector according to any one of Claims 1 to 7, characterised in that the HF internal conductor (9) and the LF internal conductor (27) extend parallel to each other or have a diverging angle which is less than 10°, preferably less than 5°.
9. Coaxial HF plug-in connector according to any one of Claims 1 to 8, characterised in that the balun (31) is filled with a dielectric (35), preferably made of plastics material.
10. Coaxial HF plug-in connector according to any one of Claims 1 to 9, characterised in that the balun (31) comprising an external dielectric (37) is arranged so as to be electrogalvanically isolated from the plug-in connector external conductor (3), the dielectric (37) preferably being made of plastics material.
11. Coaxial HF plug-in connector according to any one of Claims 1 to 10, characterised in that a plurality of holes (21, 21b) is provided for a plurality of decoupling branches (23).
12. Coaxial HF plug-in connector according to any one of Claims 1 to 11, characterised in that the balun base (31b) has a hole which is penetrated by the LF internal conductor (27), the LF internal conductor (27) being soldered to the balun base (31b) preferably on the outside thereof.
13. Coaxial HF plug-in connector according to any one of Claims 1 to 12, characterised in that the axial holes and/or the axial spaces inside the plug-in connector external conductor (3) are formed in such a way and the maximum radial extension between the HF internal conductor (9) and the outside of the balun (31) or of the dielectric (37) surrounding the balun (31) is of such a size that a preproduced constructional unit consisting of the plug-in connector internal conductor (5), HF internal conductor (9), LF internal conductor (27) and also the associated balun (31) and preferably of a dielectric (7) attached to the plug-in connector internal conductor (5) can be inserted or introduced into the plug-in external conductor (3) from the coaxial connection side (8).
14. Coaxial HF plug-in connector according to any one of Claims 1 to 12, characterised in that the axial holes and/or the axial spaces inside the plug-in connector external conductor (3) are formed in such a way and the maximum radial extension between the HF internal conductor (9) and the outside of the balun (31) or of the dielectric (37) surrounding the balun (31) is of such a size that a preproduced constructional unit consisting of the plug-in connector internal conductor (5), HF internal conductor (9), LF internal conductor (27) and preferably of a dielectric (7) attached to the plug-in connector internal conductor (5) can be inserted or introduced into the plug-in connector external conductor (3) from the coaxial connection side (8) and the corresponding balun can be inserted into the hole (21a) provided for this purpose from the opposing side and is electrically connectable to the LF internal conductor (27).
15. Coaxial HF plug-in connector according to any one of Claims 1 to 14, characterised in that the HF internal conductor (9) ends in the plug-in connector external conductor (3) and there is provided in the plug-in connector external conductor (3) a connection portion (17) via which a coaxial connection cable (13), the internal conductor (13a) of which can be contacted with the HF internal conductor (9), can be connected.
16. Coaxial HF plug-in connector according to any one of Claims 1 to 14, characterised in that the HF internal conductor (9) is axially guided out at the end-face external conductor end (10) via a hole provided therein.
17. Coaxial HF plug-in connector according to any one of Claims 1 to 16, characterised in that the LF internal conductor (27) is guided out of the plug-in connector external conductor (3) at the end-face external conductor end (10).
18. Coaxial HF plug-in connector according to any one of Claims 1 to 17, characterised in that a plurality of decoupling lines (23) is provided with a plurality of baluns (31), preferably in parallel and in particular in axial orientation.
19. Coaxial HF plug-in connector according to Claim 18, characterised in that the baluns (31) are of differing electrical length, if at least two decoupling branches (23) are provided with at least one respective balun (31), are different in length and thus have a locking effect with respect to differing frequencies or frequency ranges.
20. Coaxial HF plug-in connector according to any one of Claims 1 to 19, characterised in that the external conductor internal diameter and the internal conductor diameter decrease from the coaxial connection side toward the connection end, the impedance level preferably remaining constant.
21. Coaxial HF plug-in connector according to any one of Claims 1 to 19, characterised in that the external conductor internal diameter and the internal conductor diameter have a uniform diameter from the coaxial connection side toward the connection end.
22. Coaxial HF plug-in connector according to any one of Claims 1 to 19, characterised in that the external conductor internal diameter and the internal conductor diameter increase from the coaxial connection side to the connection end, the impedance level preferably varying.

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