EP3001515B1 - Hf housing with coaxial hf plug-in connection - Google Patents

Hf housing with coaxial hf plug-in connection Download PDF

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Publication number
EP3001515B1
EP3001515B1 EP15002327.3A EP15002327A EP3001515B1 EP 3001515 B1 EP3001515 B1 EP 3001515B1 EP 15002327 A EP15002327 A EP 15002327A EP 3001515 B1 EP3001515 B1 EP 3001515B1
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EP
European Patent Office
Prior art keywords
coaxial
housing
plug
connector
connection
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EP15002327.3A
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German (de)
French (fr)
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EP3001515A1 (en
Inventor
Torben Baras
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Hensoldt Sensors GmbH
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Hensoldt Sensors GmbH
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Publication of EP3001515A1 publication Critical patent/EP3001515A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/52—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency mounted in or to a panel or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/42—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches
    • H01R24/44—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches comprising impedance matching means

Definitions

  • the invention relates to an RF housing with coaxial RF connector for connecting a coaxial RF line to the RF housing according to the preamble of claim 1.
  • the invention generally falls within the field of high frequency signal transmission via coaxial connectors and cables.
  • the signal transmission between high-frequency modules is usually realized via corresponding cable connections via screwed connectors.
  • coaxial plug-in connectors are commonly used, which optimally have low signal reflections at the transition points between cable and plug connector as well as plug connectors and module housings.
  • FIG Fig. 1 An exemplary prior art transition is in the exploded view of FIG Fig. 1 shown in cross section. It shows a coaxial RF connector 100 with inner conductor 102 and outer conductor 101 for connection to a housing 300.
  • the connection element 200 likewise has inner 202 and outer conductor 201.
  • the space between inner conductor 202 and outer conductor 201 is filled with a glass material to ensure gas tightness.
  • the coaxial plug connector 100 is placed centered over the inner conductor 202 of the connection element 200.
  • the inner conductor 102 of the connector 100 has at its end via a corresponding spring contact ("tulip").
  • a discontinuity in the waveguide in the area between the connector and the housing Due to tolerances in the manufacturing processes of the components involved, there is a discontinuity in the waveguide in the area between the connector and the housing. This is from the enlarged view of the transition region according to Fig. 2 clearly visible.
  • the tulip is usually reset a small distance ā‡ 1 (relative to the outer conductor 101) in order not to be able to touch down.
  • the connection element 200 is inserted deeper into the housing 300 by a certain distance .DELTA.2 so as not to protrude.
  • This structure causes the capacitance of the waveguide to decrease in a short section, increasing the impedance of the line.
  • the impedance mismatch occurs, in particular in the range above 20 GHz to significant reflections that can be for the operation of the high-frequency package of disadvantage.
  • the US 4,737,123 A describes an RF housing with coaxial RF connector for connecting a coaxial RF line to the RF housing. Between the connector and the RF housing is a the electrical contact mediating resilient element, each with a flange for contacting HF housing or HF housing available.
  • the resilient design by means of the two flanges allows a secure contact even at changed temperatures.
  • the invention has for its object to improve the known structure for connecting a coaxial RF line to an RF housing such that the described impedance jump at the transition and the associated reflections are reduced.
  • a compensation element This is designed such that it extends at least in a circumferential angle range ā‡ 360 Ā° of the coaxial RF connector in the radial direction in the direction of the inner conductor towards as the outer conductor of the connector.
  • the compensation element does not touch the inner conductor.
  • the compensation element ensures that the outer conductor of the connector is brought closer to the inner conductor in the region of the transition. As a result of this measure, the capacity cover increases locally in the transition area, so that the discontinuity and the associated references can be reduced. As a result, the impedance of the waveguide in the transition region will differ as little as possible from the standard value (50 ohms or 75 ohms) of the line impedance.
  • the shape of the compensation element can be varied to a large extent, as far as the above basic rule is observed.
  • the compensation element is designed as a sheet-like element with an opening for the inner conductor.
  • the aperture can be made circular in an advantageous embodiment similar to the circular structure of the coaxial connector and arranged concentrically.
  • the compensation element of the invention can be easily and inexpensively made of a thin metal sheet. It offers here passivated steel, since a variety of connectors is also made of this material. It is also possible to apply any other type of surface coating, such as electroplated gold, to a dielectric base material as needed.
  • Another advantage of the invention is the fact that the inventive use of the compensation element does not require a modification of the other components involved.
  • the invention is by no means limited to the above-mentioned gastight connection elements. If no hermetic termination of the housing is desired, a Teflon-based termination may be used instead of a glass material.
  • the compensation element is expediently attached to the housing before mounting the plug.
  • the 3 and 4 show the exploded view of a coaxial RF connector 10 in hermetically sealed housings according to the invention.
  • a coaxial connector 200 is soldered, which allows a hermetic closure of the housing.
  • the compensation element 400 according to the invention is present.
  • the latter is here designed as a thin metal sheet with a circular opening 401, which is positioned concentrically to the coaxial conductor structure.
  • the diameter of the circular aperture 401 of the compensation element 400 is chosen to be smaller than the inner diameter of the outer conductor 101 of the connector 100.
  • the inner diameter of the outer conductor 201 of the connection element 200 depends in particular on the dielectric constant of the material present between the inner conductor 202 and the outer conductor 201. When in the 3 and 4 In the embodiment shown, the inner diameters of the outer conductors of connection element 200 and plug connector 100 are approximately equal. It should be noted, however, that also embodiments with different inner diameters are according to the invention, since the effect of the compensation element according to the invention is also effective in such configurations.
  • Fig. 5 shows the RF connector according to the invention in a further embodiment in 3D representation.
  • the flat compensation element 400 is placed, wherein the inner conductor 202 of the connector is inserted through the circular opening 401 of the compensation element 400.
  • Connecting the coaxial connector 100 is applied by mating the inner conductor and with attached to the housing by means of two screw 105.
  • the connector 100 which forms one end of the coaxial line to be connected to the housing 300, may either be integral with the coaxial line or may be detachably connected thereto.
  • Fig. 6 shows a field of individual compensation elements 400, which are machined out of the same sheet by means of an etching process. Since the elements typically have only small dimensions, a large amount of such compensation elements can be obtained from a single sheet. A cost-effective, based on standard processes manufacturing is thus possible.
  • Fig. 7 shows four different designs for the design of the compensation element 400, in each case with respect to the cross section of the inner conductor of the connection element and outer conductor of the connector.
  • the position of the inner circumference of the outer conductor 101 of the connector and of the outer circumference of the inner conductor 202 of the connecting element is shown, as they appear in side view in the axial direction.
  • the execution according to a) corresponds to the in the Fig. 3 to 6 shown embodiments, ie circular aperture 401 in the compensation element 400, concentrically positioned to the structure of the coaxial line.
  • the embodiment according to b) shows a compensation element with an opening in the form of a triangle.
  • precisely one such circumferential angle range is provided present, which is exactly 360 Ā°.
  • the embodiment according to c) again shows a circular opening in the compensation element, however, the circle is arranged eccentrically to the structure of the coaxial line. This results in a circumferential angle range ā‡ of more than 180 Ā°, within which the compensation element 400 is closer to the center in the radial direction than the outer conductor 101.
  • the embodiment according to d) shows a compensation element 400, which in a large circumferential angle range has a circular profile with a radius greater than the inner diameter of the outer conductor 101, and deviates only in a small circumferential angular range of the circular course, within which there is a bulge in the direction has the center.
  • a circumferential angular range ā‡ results within which the compensation element 400 is located closer to the center in the radial direction than the outer conductor 101.
  • Fig. 8 the course of the input reflection factor over the frequency is shown, with (curve 12) and without compensation element (dashed curve 11). It can be seen clearly that the input reflection factor in the range of 20 GHz is significantly improved by the measure according to the invention.
  • Fig. 9 shows the simulation result in the time domain for the same back-to-back configuration. Shown is the course of the impedance over time. The goal is to keep the impedance curve as constant as possible in the range of the standard amount of 50 ohms. The smaller the deviation from this value over time, the better the matching over all frequencies.
  • the impedance curve of the uncompensated structure shows significant inductive peaks in the range of 55 ps and 250 ps to over 52 ohms, each associated with a transition.
  • the tips are significantly reduced, as in Fig. 9 can be seen in the course of the curve 13.

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  • Coupling Device And Connection With Printed Circuit (AREA)

Description

Die Erfindung betrifft ein HF-GehƤuse mit koaxialer HF-Steckverbindung zum Anschluss einer koaxialen HF-Leitung an das HF-GehƤuse nach dem Oberbegriff des Anspruch 1. Die Erfindung fƤllt generell in das Gebiet der Hochfrequenz-SignalĆ¼bertragung Ć¼ber koaxiale Steckverbinder und Kabel.The invention relates to an RF housing with coaxial RF connector for connecting a coaxial RF line to the RF housing according to the preamble of claim 1. The invention generally falls within the field of high frequency signal transmission via coaxial connectors and cables.

Die SignalĆ¼bertragung zwischen Hochfrequenzbaugruppen wird Ć¼blicherweise Ć¼ber entsprechende Kabelverbindungen Ć¼ber geschraubte Steckverbinder realisiert. Bis in den Millimeterwellenbereich sind koaxiale Steckverbinder gƤngig, die optimalerweise geringe Signalreflektionen an den Ɯbergangsstellen zwischen Kabel und Steckverbinder sowie Steckverbinder und BaugruppengehƤuse aufweisen.The signal transmission between high-frequency modules is usually realized via corresponding cable connections via screwed connectors. Up to the millimeter-wave range, coaxial plug-in connectors are commonly used, which optimally have low signal reflections at the transition points between cable and plug connector as well as plug connectors and module housings.

Eine besondere Form des Ɯbergangs zwischen Steckverbinder und GehƤuse stellen hermetische GlasdurchfĆ¼hrungen dar. Anhand eine solchen AusfĆ¼hrung soll im Folgenden die der zugrunde liegende Problematik erlƤutert werden. Ɯber eine gasdichte Lƶtung der DurchfĆ¼hrung in das GehƤuse wird sichergestellt, dass kein Luft- oder Feuchtigkeitsaustausch mit der Umgebung stattfinden kann. Diese Art der Aufbautechnik wird u.a. dann angewendet, wenn die Schaltungsanordnung im Innern des GehƤuses vor UmwelteinflĆ¼ssen besonders zu schĆ¼tzen ist. Die elektromagnetische Welle jedoch kann Ć¼ber den Wellenleiter mit dem Glas als Dielektrikum die GehƤusewand passieren.A special form of the transition between connector and housing hermetic glass penetrations represent. Based on such an embodiment will be explained below the underlying problem. A gas-tight soldering of the bushing in the housing ensures that no air or moisture exchange with the environment can take place. This type of construction technique is u.a. then applied when the circuitry inside the case is particularly protected from environmental influences. However, the electromagnetic wave can pass through the waveguide with the glass as a dielectric housing wall.

Ein beispielhafter Ɯbergang gemƤƟ Stand der Technik ist in der Explosionszeichnung der Fig. 1 im Querschnitt dargestellt. Sie zeigt einen koaxialen HF-Steckverbinder 100 mit Innenleiter 102 und AuƟenleiter 101 zum Anschluss an ein GehƤuse 300. Die DurchfĆ¼hrung des HF-Signals durch die GehƤusewand sowie der Anschluss des HF-Steckverbinders 100 erfolgt Ć¼ber das Anschlusselement 200, welches hier gasdicht in die GehƤusewand eingelƶtet ist. Das Anschlusselement 200 weist ebenfalls Innen- 202 und AuƟenleiter 201 auf. Der Raum zwischen Innenleiter 202 und AuƟenleiter 201 ist von einem Glasmaterial erfĆ¼llt, um die Gasdichtigkeit zu gewƤhrleisten.An exemplary prior art transition is in the exploded view of FIG Fig. 1 shown in cross section. It shows a coaxial RF connector 100 with inner conductor 102 and outer conductor 101 for connection to a housing 300. The implementation of the RF signal through the housing wall and the connection of the RF connector 100 via the connection element 200, which is soldered gas-tight here in the housing wall. The connection element 200 likewise has inner 202 and outer conductor 201. The space between inner conductor 202 and outer conductor 201 is filled with a glass material to ensure gas tightness.

Nach dem Einlƶten des Anschlusselements 200 wird der koaxiale Steckverbinder 100 Ć¼ber den Innenleiter 202 des Anschlusselements 200 zentriert aufgesteckt. Hierzu verfĆ¼gt der Innenleiter 102 des Steckverbinders 100 an seinem Ende Ć¼ber einen entsprechenden Federkontakt ("Tulpe").After soldering the connection element 200, the coaxial plug connector 100 is placed centered over the inner conductor 202 of the connection element 200. For this purpose, the inner conductor 102 of the connector 100 has at its end via a corresponding spring contact ("tulip").

Aufgrund von Toleranzen in den Fertigungsprozessen der beteiligten Komponenten kommt es im Bereich des Ɯbergangs zwischen Steckverbinder und GehƤuse zu einer DiskontinuitƤt im Wellenleiter. Dies ist aus der vergrĆ¶ĆŸerten Darstellung des Ɯbergangsbereichs gemƤƟ Fig. 2 gut zu erkennen. Die Tulpe ist Ć¼blicherweise eine geringe Distanz Ī”1 zurĆ¼ckgesetzt (relativ zum AuƟenleiter 101), um nicht aufsetzen zu kƶnnen. Das Anschlusselement 200 wird um eine gewisse Distanz Ī”2 tiefer in das GehƤuse 300 eingebracht, um nicht hervorzustehen. Es ergeben sich durch diese Toleranzen im Ɯbergangsbereich unerwĆ¼nschte SprĆ¼nge im VerhƤltnis von Innendurchmesser des AuƟenleiters zum AuƟendurchmesser des Innenleiters.Due to tolerances in the manufacturing processes of the components involved, there is a discontinuity in the waveguide in the area between the connector and the housing. This is from the enlarged view of the transition region according to Fig. 2 clearly visible. The tulip is usually reset a small distance Ī”1 (relative to the outer conductor 101) in order not to be able to touch down. The connection element 200 is inserted deeper into the housing 300 by a certain distance .DELTA.2 so as not to protrude. These tolerances in the transition region result in unwanted jumps in the ratio of the inner diameter of the outer conductor to the outer diameter of the inner conductor.

Dieser Aufbau fĆ¼hrt dazu, dass in einem kurzen Abschnitt der KapazitƤtsbelag des Wellenleiters sinkt, wodurch die Impedanz der Leitung steigt. Durch den Impedanzsprung kommt es, ins besondere im Bereich oberhalb von 20 GHz zu nennenswerten Reflektionen, die fĆ¼r den Betrieb der Hochfrequenzbaugruppe von Nachteil sein kƶnnen.This structure causes the capacitance of the waveguide to decrease in a short section, increasing the impedance of the line. By the impedance mismatch occurs, in particular in the range above 20 GHz to significant reflections that can be for the operation of the high-frequency package of disadvantage.

Die US 4,737,123 A beschreibt ein HF-GehƤuse mit koaxialer HF-Steckverbindung zum Anschluss einer koaxialen HF-Leitung an das HF-GehƤuse. Zwischen Steckverbindung und HF-GehƤuse ist ein den elektrischen Kontakt vermittelndes federndes Element mit jeweils einem Flansch zur Kontaktierung von HF-GehƤuse bzw. HF-GehƤuse vorhanden. Die federnde Ausbildung mittels der beiden Flansche ermƶglicht einen sicheren Kontakt auch bei verƤnderten Temperaturen.The US 4,737,123 A describes an RF housing with coaxial RF connector for connecting a coaxial RF line to the RF housing. Between the connector and the RF housing is a the electrical contact mediating resilient element, each with a flange for contacting HF housing or HF housing available. The resilient design by means of the two flanges allows a secure contact even at changed temperatures.

Der Erfindung liegt die Aufgabe zugrunde, den bekannten Aufbau zu Anschluss einer koaxialer HF-Leitung an ein HF-GehƤuse derart zu verbessern, dass der beschriebene Impedanzsprung am Ɯbergang und die damit verbundenen Reflektionen verringert werden.The invention has for its object to improve the known structure for connecting a coaxial RF line to an RF housing such that the described impedance jump at the transition and the associated reflections are reduced.

Diese Aufgabe wird mit dem Gegenstand gemƤƟ Anspruch 1 gelƶst. Vorteilhafte AusfĆ¼hrungen sind Gegenstand von UnteransprĆ¼chen.This object is achieved with the subject matter of claim 1. Advantageous embodiments are the subject of dependent claims.

GemƤƟ der Erfindung wir zwischen Steckverbinder und GehƤuse und an beide angrenzend ein Kompensations-Element eingefĆ¼hrt. Dies ist derart gestaltet, dass es mindestens in einem Umfangswinkelbereich ā‰¤ 360Ā° der koaxialen HF-Steckverbindung sich in radialer Richtung weiter in Richtung auf den Innenleiter hin erstreckt als der AuƟenleiter des Steckverbinders. Dabei berĆ¼hrt das Kompensationselement den Innenleiter nicht.According to the invention we introduced between the connector and the housing and both adjacent a compensation element. This is designed such that it extends at least in a circumferential angle range ā‰¤ 360 Ā° of the coaxial RF connector in the radial direction in the direction of the inner conductor towards as the outer conductor of the connector. The compensation element does not touch the inner conductor.

Das Kompensationselement sorgt dafĆ¼r, dass der AuƟenleiter der Steckverbindung im Bereich des Ɯbergangs nƤher an den Innenleiter herangebracht wird. Durch diese MaƟnahme steigt der KapazitƤtsbelag lokal im Ɯbergangsbereich, sodass die DiskontinuitƤt und die damit verbundenen Ref!ektionen verringert werden kƶnnen. Im Ergebnis wird die Impedanz des Wellenleiters im Ɯbergangsbereich mƶglichst wenig von Normbetrag (50 Ohm oder 75 Ohm) der Leitungsimpedanz abweichen.The compensation element ensures that the outer conductor of the connector is brought closer to the inner conductor in the region of the transition. As a result of this measure, the capacity cover increases locally in the transition area, so that the discontinuity and the associated references can be reduced. As a result, the impedance of the waveguide in the transition region will differ as little as possible from the standard value (50 ohms or 75 ohms) of the line impedance.

Die Form des Kompensationselements ist in groƟem MaƟ variierbar, soweit die obige Grundregel eingehalten wird. Das Kompensationselement ist als ein flƤchenhaftes Element mit einer Durchbrechung fĆ¼r den Innenleiter ausgebildet. Die Durchbrechung kann in einer vorteilhaften AusfĆ¼hrung analog zu der zirkularen Struktur der koaxialen Steckverbindung kreisrund ausgefĆ¼hrt und konzentrisch angeordnet sein.The shape of the compensation element can be varied to a large extent, as far as the above basic rule is observed. The compensation element is designed as a sheet-like element with an opening for the inner conductor. The aperture can be made circular in an advantageous embodiment similar to the circular structure of the coaxial connector and arranged concentrically.

Das erfindungsgemƤƟe Kompensationselement kann einfach und kostengĆ¼nstig aus einem dĆ¼nnen Metallblech hergestellt werden. Es bietet sich hier passivierter Stahl an, da eine Vielzahl von Steckverbindern ebenfalls aus diesem Material hergestellt ist. Es ist ebenso mƶglich, jede andere Art der OberflƤchenbeschichtung, z.B. galvanisch Gold, nach Bedarf auf ein dielektrisches Grundmaterial aufzubringen.The compensation element of the invention can be easily and inexpensively made of a thin metal sheet. It offers here passivated steel, since a variety of connectors is also made of this material. It is also possible to apply any other type of surface coating, such as electroplated gold, to a dielectric base material as needed.

Ein weiterer Vorteil der Erfindung ist darin zu sehen, dass der erfindungsgemƤƟe Einsatz des Kompensationselements eine Modifikation der Ć¼brigen beteiligten Komponenten nicht erfordert.Another advantage of the invention is the fact that the inventive use of the compensation element does not require a modification of the other components involved.

Die Erfindung ist keineswegs auf die eingangs erwƤhnten gasdichten Anschlusselemente beschrƤnkt. Falls kein hermetischer Abschluss des GehƤuses erwĆ¼nsch ist, kann anstatt eines Glasmaterials auch ein Teflon-basiertes Abschlusselement verwendet werden.The invention is by no means limited to the above-mentioned gastight connection elements. If no hermetic termination of the housing is desired, a Teflon-based termination may be used instead of a glass material.

Das Kompensationselement wird zweckmƤƟigerweise vorder Montage des Steckers am GehƤuse angebracht.The compensation element is expediently attached to the housing before mounting the plug.

Die Erfindung wird unter Bezugnahme auf Figuren anhand von konkreten AusfĆ¼hrungsbeispielen erlƤutert. Es zeigen:

Fig. 1
die Explosionsdarstellung einer koaxialen HF-Steckverbindung in hermetisch abgeschlossenen GehƤusen nach dem Stand der Technik;
Fig. 2
die Detaildarstellung einer vollstƤndig montierten koaxialen HF-Steckverbindung nach Fig. 1;
Fig. 3
die Explosionsdarstellung einer koaxialen HF-Steckverbindung in hermetisch abgeschlossenen GehƤusen gemƤƟ der Erfindung;
Fig. 4
die Detaildarstellung einer vollstƤndig montierten koaxialen HF-Steckverbindung nach Fig. 3;
Fig. 5
die Explosionsdarstellung in 3D einer erfindungsgemƤƟen koaxialen HF-Steckverbindung;
Fig. 6
mehrere aus einem Blech hergestellte Kompensationselemente gemƤƟ der Erfindung;
Fig. 7
mehrere zweckmƤƟige Ausbildungen des Kompensationselements gemƤƟ der Erfindung;
Fig. 8
ein Simulationsergebnis fĆ¼r den Verlauf des Eingangsreflektionsfaktors Ć¼ber der Frequenz zweier in Kette geschalteter koaxialer HF-Steckverbindungen (mit und ohne erfindungsgemƤƟem Kompensationselement),
Fig. 9
ein Simulationsergebnis fĆ¼r den Verlauf der Impedanz im Zeitbereich zweier in Kette geschalteter koaxialer HF-Steckverbindungen (mit und ohne erfindungsgemƤƟem Kompensationselement).
The invention will be explained with reference to figures with reference to concrete embodiments. Show it:
Fig. 1
the exploded view of a coaxial RF connector in hermetically sealed housings according to the prior art;
Fig. 2
the detail of a fully assembled coaxial RF connector after Fig. 1 ;
Fig. 3
the exploded view of a coaxial RF connector in hermetically sealed housings according to the invention;
Fig. 4
the detail of a fully assembled coaxial RF connector after Fig. 3 ;
Fig. 5
the exploded view in 3D of a coaxial RF connector according to the invention;
Fig. 6
a plurality of compensating elements made of sheet metal according to the invention;
Fig. 7
several expedient embodiments of the compensation element according to the invention;
Fig. 8
a simulation result for the course of the input reflection factor over the frequency of two chain-connected coaxial RF connectors (with and without inventive compensation element),
Fig. 9
a simulation result for the course of the impedance in the time domain of two chain-connected coaxial RF connectors (with and without inventive compensating element).

Die Fig. 3 und 4 zeigen die Explosionsdarstellung einer koaxialen HF-Steckverbindung 10 in hermetisch abgeschlossenen GehƤusen gemƤƟ der Erfindung. In die Wand des GehƤuses 300 ist ein koaxiales AnschlussstĆ¼ck 200 eingelƶtet, das einen hermetischen Abschluss des GehƤuses ermƶglicht. Zwischen dem GehƤuse 300 und dem Steckverbinder 100 ist das erfindungsgemƤƟe Kompensationselement 400 vorhanden. Letzteres ist hier ausgebildet als dĆ¼nnes Metallblech mit einer zirkularen Durchbrechung 401, die konzentrisch zur koaxialen Leiterstruktur positioniert ist. Wie man den Figuren entnimmt, ist der Durchmesser der zirkularen Durchbrechung 401 des Kompensationselements 400 so gewƤhlt, dass er kleiner ist als der Innendurchmesser des AuƟenleiters 101 des Steckverbinders 100. Durch die ƶrtliche Erhƶhung des KapazitƤtsbelags im Ɯbergangsbereich zwischen Steckverbinder 100 und GehƤuse/AnschlussstĆ¼ck 300/200 wird die DiskontinuitƤt im Wellenwiderstand aufgrund der beschriebenen Bauteiltoleranzen vermindert bzw. vƶllig beseitigt.The 3 and 4 show the exploded view of a coaxial RF connector 10 in hermetically sealed housings according to the invention. In the wall of the housing 300, a coaxial connector 200 is soldered, which allows a hermetic closure of the housing. Between the housing 300 and the connector 100, the compensation element 400 according to the invention is present. The latter is here designed as a thin metal sheet with a circular opening 401, which is positioned concentrically to the coaxial conductor structure. As can be seen from the figures, the diameter of the circular aperture 401 of the compensation element 400 is chosen to be smaller than the inner diameter of the outer conductor 101 of the connector 100. By locally increasing the capacitance in the transition region between the connector 100 and the housing / connector 300 / 200, the discontinuity in the characteristic impedance due to the described component tolerances is reduced or completely eliminated.

Der Innendurchmesser des AuƟenleiters 201 des Anschlusselements 200 hƤngt insbesondere von der DielektrizitƤtskonstante des zwischen Innenleiter 202 und AuƟenleiter 201 vorhandenen Materials ab. Bei der in der Fig. 3 und 4 gezeigten AusfĆ¼hrung sind die Innendurchmesser der AuƟenleiter von Anschlusselement 200 und Steckverbinder 100 annƤhernd gleich. Es ist jedoch darauf hinzuweisen, dass auch AusfĆ¼hrungen mit unterschiedlichen Innendurchmessern erfindungsgemƤƟ sind, da der erfindungsgemƤƟe Effekt des Kompensationselements auch in derartigen Konfigurationen wirksam ist.The inner diameter of the outer conductor 201 of the connection element 200 depends in particular on the dielectric constant of the material present between the inner conductor 202 and the outer conductor 201. When in the 3 and 4 In the embodiment shown, the inner diameters of the outer conductors of connection element 200 and plug connector 100 are approximately equal. It should be noted, however, that also embodiments with different inner diameters are according to the invention, since the effect of the compensation element according to the invention is also effective in such configurations.

Fig. 5 zeigt die erfindungsgemƤƟe HF-Steckverbindung in einer weiteren AusfĆ¼hrung in 3D-Darstellung. Nach dem das AnschlussstĆ¼ck 200 in das GehƤuse 300 eingebracht ist, wird das flache Kompensationselement 400 aufgelegt, wobei der Innenleiter 202 des AnschlussstĆ¼cks durch die zirkulare Durchbrechung 401 des Kompensationselements 400 gesteckt wird. AnschlieƟen wird der koaxiale Steckverbinder 100 durch Zusammenstecken der Innenleiter aufgebracht und mit dem GehƤuse mittels zweier Schraubverbinder 105 befestigt. Der Steckverbinder 100, welcher ein Ende der mit dem GehƤuse 300 zu verbindenden Koaxialleitung bildet, kann entweder integral mit der Koaxialleitung sein oder wiederlƶsbar mit dieser verbunden sein. Fig. 5 shows the RF connector according to the invention in a further embodiment in 3D representation. After the connector 200 is inserted into the housing 300, the flat compensation element 400 is placed, wherein the inner conductor 202 of the connector is inserted through the circular opening 401 of the compensation element 400. Connecting the coaxial connector 100 is applied by mating the inner conductor and with attached to the housing by means of two screw 105. The connector 100, which forms one end of the coaxial line to be connected to the housing 300, may either be integral with the coaxial line or may be detachably connected thereto.

Fig. 6 zeigt ein Feld von einzelnen Kompensationselementen 400, die mittels eines Ƅtzprozesses aus demselben Blech herausgearbeitet sind. Da die Elemente typischerweise nur geringe Abmessungen aufweisen, kann aus einem einzelnen Blech eine groƟe Menge derartiger Kompensationselemente erhalten werden. Eine kostengĆ¼nstige, auf Standardprozessen basierende Herstellung ist somit mƶglich. Fig. 6 shows a field of individual compensation elements 400, which are machined out of the same sheet by means of an etching process. Since the elements typically have only small dimensions, a large amount of such compensation elements can be obtained from a single sheet. A cost-effective, based on standard processes manufacturing is thus possible.

Fig. 7 zeigt vier verschiedene AusfĆ¼hrungen zum Design des Kompensationselements 400 und zwar jeweils im Bezug zum Querschnitt von Innenleiter des Anschlusselements und AuƟenleiter des Steckverbinders. Zu diesem Zweck ist die Lage des Innenumfangs des AuƟenleiters 101 des Steckverbinders sowie des AuƟenumfangs des Innenleiters 202 des Anschlusselements eingezeichnet, wie sie in Seitenansicht in axialer Richtung erscheinen. Fig. 7 shows four different designs for the design of the compensation element 400, in each case with respect to the cross section of the inner conductor of the connection element and outer conductor of the connector. For this purpose, the position of the inner circumference of the outer conductor 101 of the connector and of the outer circumference of the inner conductor 202 of the connecting element is shown, as they appear in side view in the axial direction.

Die AusfĆ¼hrung nach a) entspricht den in den Fig. 3 bis 6 gezeigten AusfĆ¼hrungen, d.h. kreisfƶrmige Durchbrechung 401 im Kompensationselement 400, konzentrisch positioniert zur Struktur der koaxialen Leitung.The execution according to a) corresponds to the in the Fig. 3 to 6 shown embodiments, ie circular aperture 401 in the compensation element 400, concentrically positioned to the structure of the coaxial line.

Die AusfĆ¼hrung nach b) zeigt ein Kompensationselement mit einer Durchbrechung in Form eines Dreiecks. Hier existieren drei Umfangswinkelbereiche Ī±1, Ī±2 und Ī±3, innerhalb derer sich das Kompensationselement 400 in radialer Richtung gesehen nƤher an der Zentralachse der Koaxialleitung (und somit nƤher am Innenleiter 202) befindet als der AuƟenleiter 101. Im Beispiel nach a) ist genau ein solcher Umfangswinkelbereich vorhanden, der exakt 360Ā° betrƤgt.The embodiment according to b) shows a compensation element with an opening in the form of a triangle. Here there are three circumferential angle ranges Ī±1, Ī±2 and Ī±3 within which the compensation element 400 is closer to the central axis of the coaxial line (and thus closer to the inner conductor 202) than the outer conductor 101. In the example according to a), precisely one such circumferential angle range is provided present, which is exactly 360 Ā°.

Die AusfĆ¼hrung nach c) zeigt wieder eine kreisfƶrmige Durchbrechung im Kompensationselement, allerdings ist der Kreis exzentrisch zur Struktur der Koaxialleitung angeordnet. Hier ergibt sich ein Umfangswinkelbereich Ī± von mehr als 180Ā°, innerhalb welcher sich das Kompensationselement 400 in radialer Richtung nƤher am Zentrum befindet als der AuƟenleiter 101.The embodiment according to c) again shows a circular opening in the compensation element, however, the circle is arranged eccentrically to the structure of the coaxial line. This results in a circumferential angle range Ī± of more than 180 Ā°, within which the compensation element 400 is closer to the center in the radial direction than the outer conductor 101.

SchlieƟlich zeigt die AusfĆ¼hrung nach d) ein Kompensationselement 400, welche in einem groƟen Umfangswinkelbereich einen kreisfƶrmigen Verlauf mit einem Radius grĆ¶ĆŸer als der Innendurchmesser des AuƟenleiters 101 aufweist, und nur in einem kleinen Umfangswinkelbereich vom kreisfƶrmigen Verlauf abweicht, innerhalb dessen es eine Ausbuchtung in Richtung auf das Zentrum aufweist. Es ergibt sich somit auch hier ein Umfangswinkelbereich Ī± innerhalb dessen sich das Kompensationselement 400 in radialer Richtung nƤher am Zentrum befindet als der AuƟenleiter 101.Finally, the embodiment according to d) shows a compensation element 400, which in a large circumferential angle range has a circular profile with a radius greater than the inner diameter of the outer conductor 101, and deviates only in a small circumferential angular range of the circular course, within which there is a bulge in the direction has the center. Thus, here too, a circumferential angular range Ī± results within which the compensation element 400 is located closer to the center in the radial direction than the outer conductor 101.

Fig. 8 und 9 zeigen Simulationsergebnisse zur Wirkung des erfindungsgemƤƟen Kompensationselements fĆ¼r zwei in Kette geschaltete ƜbergƤnge (sogenannte Back-to-Back-Konfiguration), d.h. das Signal passiert nacheinander zwei der beschriebenen HF-Steckverbindungen, die an der Vor- und RĆ¼ckseite desselben GehƤuses angeordnet sind . 8 and 9 show simulation results for the effect of the compensation element according to the invention for two in-line transitions (so-called back-to-back configuration), ie the signal passes successively two of the described RF connectors, which are arranged on the front and back of the same housing.

In Fig. 8 ist der Verlauf des Eingangsreflektionsfaktors Ć¼ber der Frequenz dargestellt, und zwar mit (Kurve 12) und ohne Kompensationselement (gestrichelte Kurve 11). Man erkennt deutlich, dass durch die erfindungsgemƤƟe MaƟnahme der Eingangsreflektionsfaktor im Bereich von 20 GHz deutlich verbessert ist.In Fig. 8 the course of the input reflection factor over the frequency is shown, with (curve 12) and without compensation element (dashed curve 11). It can be seen clearly that the input reflection factor in the range of 20 GHz is significantly improved by the measure according to the invention.

Fig. 9 zeigt das Simulationsergebnis im Zeitbereich fĆ¼r dieselbe Back-to-Back-Konfiguration. Dargestellt ist der Verlauf der Impedanz Ć¼ber der Zeit. Ziel ist es, den Impedanzverlauf mƶglichst konstant im Bereich des Normbetrags von 50 Ohm zu halten. Je geringer die Abweichung von diesem Wert Ć¼ber der Zeit, desto besser die Anpassung Ć¼ber alle Frequenzen. Im Impedanzverlauf der unkompensierten Struktur (gestrichelte Kurve 14) zeigen sich deutliche induktive Spitzen im Bereich von 55 ps bzw. 250 ps bis Ć¼ber 52 Ohm, die jeweils einem Ɯbergang zugeordnet sind. Durch das erfindungsgemƤƟe Kompensationselement werden die Spitzen deutlich verringert, wie in Fig. 9 im Verlauf der Kurve 13 zu erkennen ist. Fig. 9 shows the simulation result in the time domain for the same back-to-back configuration. Shown is the course of the impedance over time. The goal is to keep the impedance curve as constant as possible in the range of the standard amount of 50 ohms. The smaller the deviation from this value over time, the better the matching over all frequencies. The impedance curve of the uncompensated structure (dashed curve 14) shows significant inductive peaks in the range of 55 ps and 250 ps to over 52 ohms, each associated with a transition. By the compensation element according to the invention, the tips are significantly reduced, as in Fig. 9 can be seen in the course of the curve 13.

Claims (5)

  1. RF housing having a coaxial RF plug-in connection (10) for connecting a coaxial RF line to the RF housing (300),
    comprising:
    - a coaxial plug-in connector (100) which forms the end of the RF line and has an inner conductor (102) and an outer conductor (101),
    - a coaxial connection piece (200) which is arranged in an opening of the housing (300) and the inner conductor (202) of which is inserted into the inner conductor (102) of the coaxial plug-in connector (100),
    - wherein a compensation element (400) is arranged between the plug-in connector (100) and the housing (300) and adjoins the latter and, in at least a circumferential angle range ā‰¤ 360Ā° of the coaxial RF plug-in connection (10), extends further in the direction of the inner conductor (202) than the outer conductor (101) of the plug-in connector (100) in the radial direction and without touching the inner conductor (202),
    - wherein the compensation element (400) has an aperture (401) for the inner conductor (202),
    - wherein a jump in impedance at the transition between the plug-in connector and the housing and the associated reflections are reduced by the compensation element (400),
    characterized in that the compensation element (400) is of flat design.
  2. RF housing having a coaxial RF plug-in connection (10) according to claim 1, characterized in that the aperture (401) is circular and is arranged concentrically in relation to the structure of the coaxial RF plug-in connection.
  3. RF housing having a coaxial RF plug-in connection (10) according to either of the preceding claims, characterized in that the compensation element (400) is composed of a conductive material or of a nonconductive material which has a conductive coating.
  4. RF housing having a coaxial RF plug-in connection (10) according to one of the preceding claims, characterized in that, at the coaxial connection piece (200), the physical region between the inner conductor (202) and the outer conductor (201) is filled by a dielectric solid, in particular a glass.
  5. RF housing having a coaxial RF plug-in connection (10) according to one of the preceding claims, characterized in that the connection piece (200) is connected to the housing in a gas- and moisture-tight manner.
EP15002327.3A 2014-09-27 2015-08-04 Hf housing with coaxial hf plug-in connection Active EP3001515B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014014472.0A DE102014014472A1 (en) 2014-09-27 2014-09-27 Coaxial RF connector

Publications (2)

Publication Number Publication Date
EP3001515A1 EP3001515A1 (en) 2016-03-30
EP3001515B1 true EP3001515B1 (en) 2018-10-10

Family

ID=53783020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15002327.3A Active EP3001515B1 (en) 2014-09-27 2015-08-04 Hf housing with coaxial hf plug-in connection

Country Status (3)

Country Link
EP (1) EP3001515B1 (en)
DE (1) DE102014014472A1 (en)
ES (1) ES2711126T3 (en)

Family Cites Families (2)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
US4737123A (en) * 1987-04-15 1988-04-12 Watkins-Johnson Company Connector assembly for packaged microwave integrated circuits
US4815986A (en) * 1987-08-14 1989-03-28 Lucas Weinschel, Inc. Self-aligning blind mate connector

Also Published As

Publication number Publication date
DE102014014472A1 (en) 2016-03-31
ES2711126T3 (en) 2019-04-30
EP3001515A1 (en) 2016-03-30

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