EP2052434B1 - Directional coupler - Google Patents

Directional coupler Download PDF

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Publication number
EP2052434B1
EP2052434B1 EP07786579A EP07786579A EP2052434B1 EP 2052434 B1 EP2052434 B1 EP 2052434B1 EP 07786579 A EP07786579 A EP 07786579A EP 07786579 A EP07786579 A EP 07786579A EP 2052434 B1 EP2052434 B1 EP 2052434B1
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EP
European Patent Office
Prior art keywords
housing
coupling region
directional coupler
strip conductors
coupler according
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EP07786579A
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German (de)
French (fr)
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EP2052434A1 (en
Inventor
Christian Evers
Ralf JÜNEMANN
Alexander Bayer
Markus Leipold
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Rohde and Schwarz GmbH and Co KG
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Rohde and Schwarz GmbH and Co KG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips

Definitions

  • the invention relates to a directional coupler according to the preamble of the main claim.
  • Directional couplers of this type are, for example, from Meinke / Grundlach, paperback of high frequency technology, 5th edition, pages L29 to L34, and EP-A1-1 503 447 known.
  • An ideal separation of the forward and backward waves is only possible with directional couplers that allow a propagation of TEM waves. So far, this has only been possible with directional couplers in coaxial cable technology.
  • Directional couplers in microstrip line or coplanar line technology do not allow propagation of pure TEM waves.
  • directional couplers in coaxial line technology are relatively complex in construction.
  • the simpler directional couplers in microstrip line or coplanar line technology have the disadvantage that they do not permit pure TEM wave propagation and therefore the phase constants of the even and odd modes, which are so important for the function of a directional coupler, are not identical.
  • An inventive directional coupler can be made very simple and inexpensive. He is extremely low-loss and above all, an extremely large bandwidth, for example, between 1 GHz and 70 GHz can be achieved.
  • Fig. 1 shows in perspective plan view of a directional coupler according to the invention with a flat metal housing 1 with removed cover 2.
  • a flat space 3 is milled out, in the lateral open to the front sides of the metal housing open connection sections.
  • coaxial connector couplings 4 - 7 are fastened to the lateral end faces of the metal housing 1, the inner conductors of which project into connecting sections of the flat space 3 of the metal housing.
  • This flat metal housing space 3 is according to Fig. 2 closed from above by means of a flat lid 2 and screwed high-frequency-tight manner with the housing 1 via screws (holes 8), not shown.
  • the four coaxial line couplings 4 to 7 each form the four high-frequency ports of the directional coupler.
  • the actual coupled lines are formed by two flat sheet metal strip conductors 9 and 10, which are arranged in the coupling region between E1 and E2 with their broad sides facing each other at a distance next to each other.
  • these two band conductors 9 and 10 are upright in the coupling region standing with their broad sides perpendicular to the bottom of the housing space 3 and held perpendicular to the inner surface of the attached lid 2 in the metal housing space 3.
  • these flat sheet metal strip conductors are laterally bent outwards and fastened to the inner conductor ends of the coaxial conductor couplings 4 to 7.
  • These flat band conductors consist of a resilient sheet material, such as copper beryllium.
  • Fig. 3 shows the top view of a not yet bent strip conductor.
  • the width is increased here for better understanding about five times.
  • the two terminal ends 11 and 12, which are bent during assembly, have approximately the same width.
  • the actual coupling section between E1 and E2 has gradually increasing width.
  • the width is tapered and increases only gradually until the coupling end E2, until the width of the terminal end 12 is reached.
  • the width of the terminal ends 11 and 12 and the respective distance to the bottom of the housing space 3 and to the inner surface of the lid 2 are chosen so that the terminal ends each have the same characteristic impedance as the subsequent coaxial line couplings, generally 50 ohms.
  • the increase in the width of the strip conductors 9, 10, which in Fig. 3 is done in sections, is approximately linear, it can of course also be continuous.
  • the distance between the strip conductors can be set exactly.
  • the ends of the plungers are preferably in turn to the Glued broad sides of the band conductor, with appropriate bias of the resilient strip conductor is possibly sufficient only the application of the ends of the strip conductors for stabilization.
  • the gates 4 and 5 and the gates 6 and 7 are coupled together and the diagonally opposite gates 4 and 6 and 5 and 7 are isolated from each other at the conclusion of each other gates.
  • Fig. 4 shows another embodiment of a directional coupler according to the invention and although only one of the band conductor is bent here and the other band conductor is currently running.
  • a robust test port 20 is mounted, the inner conductor is connected to the straight strip conductor.
  • the opposite end of the straight strip conductor is connected to a Koaxial effetskupplung which is mounted on the opposite end face of the metal housing. The rest of the structure and the support of the band conductor in the housing space is as in Fig. 1 ,
  • Fig. 4 shows additional ferrite structures 21, which are attached to the longitudinal end walls of the metal housing space for absorbing higher modes along the coupling region.
  • the directional coupler can also be operated when theoretically higher wave modes are capable of propagation at the selected dimensions.
  • the directional coupler according to the invention is particularly well suited for direct integration into a existing assembly, such as an attenuator.
  • additional terminating resistors can be integrated into the directional coupler if a signal is to be coupled out in only one direction.
  • the integration of an attenuator at one or more connection ports is also possible.
  • Such terminating resistors or attenuators can for example be integrated directly into the terminal ends 11, 12 of the strip conductors 9, 10.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Waveguides (AREA)

Description

Die Erfindung betrifft einen Richtkoppler laut Oberbegriff des Hauptanspruches.The invention relates to a directional coupler according to the preamble of the main claim.

Richtkoppler dieser Art sind beispielsweise aus Meinke/Grundlach, Taschenbuch der Hochfrequenztechnik, 5. Auflage, Seiten L29 bis L34, und EP-A1-1 503 447 bekannt. Eine ideale Trennung der vor- und rücklaufenden Wellen ist dabei nur mit Richtkopplern möglich, die eine Ausbreitung von TEM-Wellen ermöglichen. Dies ist bisher nur mit Richtkopplern in Koaxialleitungstechnik möglich. Richtkoppler in Mikrostreifenleitungs- oder Koplanarleitungstechnik ermöglichen keine Ausbreitung von reinen TEM-Wellen. Richtkoppler in Koaxialleitungstechnik sind jedoch im Aufbau relativ aufwendig. Die bezüglich Aufbau einfacheren Richtkoppler in Mikrostreifenleitungs- oder Koplanarleitungstechnik besitzen dagegen den Nachteil, dass sie keine reine TEM-Wellenausbreitung ermöglichen und daher die für die Funktion eines Richtkopplers so wichtigen Phasenkonstanten des Even- und Odd-Modes nicht identisch sind.Directional couplers of this type are, for example, from Meinke / Grundlach, paperback of high frequency technology, 5th edition, pages L29 to L34, and EP-A1-1 503 447 known. An ideal separation of the forward and backward waves is only possible with directional couplers that allow a propagation of TEM waves. So far, this has only been possible with directional couplers in coaxial cable technology. Directional couplers in microstrip line or coplanar line technology do not allow propagation of pure TEM waves. However, directional couplers in coaxial line technology are relatively complex in construction. On the other hand, the simpler directional couplers in microstrip line or coplanar line technology have the disadvantage that they do not permit pure TEM wave propagation and therefore the phase constants of the even and odd modes, which are so important for the function of a directional coupler, are not identical.

Es ist Aufgabe der Erfindung, einen Richtkoppler zu schaffen, bei dem eine reine TEM-Wellenausbreitung möglich ist und der trotzdem eine kompakte und preiswerte Herstellung ermöglicht und der vor allem extrem breitbandig ist.It is an object of the invention to provide a directional coupler, in which a pure TEM wave propagation is possible and still allows a compact and inexpensive production and is especially extremely broadband.

Diese Aufgabe wird ausgehend von einem Richtkoppler laut Oberbegriff des Anspruchs 1 durch dessen kennzeichnende Merkmale gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.This object is achieved on the basis of a directional coupler according to the preamble of claim 1 by its characterizing features. Advantageous developments emerge from the subclaims.

Ein erfindungsgemäßer Richtkoppler kann sehr einfach und preiswert hergestellt werden. Er ist extrem dämpfungsarm und es ist vor allem eine extrem große Bandbreite beispielsweise zwischen 1 GHz und 70 GHz erreichbar.An inventive directional coupler can be made very simple and inexpensive. He is extremely low-loss and above all, an extremely large bandwidth, for example, between 1 GHz and 70 GHz can be achieved.

Die Erfindung wird im folgenden anhand schematischer Zeichnungen an Ausführungsbeispielen näher erläutert.

Fig. 1
zeigt perspektivisch in Draufsicht einen erfindungsgemäßen Richtkoppler mit abgenommenen Gehäusedeckel;
Fig. 2
zeigt einen Schnitt längs der Linie A-A in Fig. 1 in Vergrößerung;
Fig. 3
zeigt die Draufsicht auf einen der beiden flachen Blech-Bandleiter und zwar bezüglich der Breite etwa um den Faktor 5 skaliert und
Fig. 4
zeigt in perspektivischer Draufsicht ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Richtkopplers mit einem integrierten massiven Testport und einem geraden durchgehenden und nur einem gebogenen Bandleiter.
The invention is explained in more detail below with reference to schematic drawings of exemplary embodiments.
Fig. 1
shows a perspective plan view of a directional coupler according to the invention with the housing cover removed;
Fig. 2
shows a section along the line AA in Fig. 1 in magnification;
Fig. 3
shows the top view of one of the two flat sheet-metal strip conductor and in terms of the width approximately scaled by a factor of 5 and
Fig. 4
shows in perspective plan view another embodiment of a directional coupler according to the invention with an integrated massive test port and a straight continuous and only a curved band conductor.

Fig. 1 zeigt in perspektivischer Draufsicht einen erfindungsgemäßen Richtkoppler mit einem flachen Metallgehäuse 1 mit abgenommenem Deckel 2. In der Oberfläche dieses Metallgehäuses 1 ist ein flacher Raum 3 ausgefräst, in den seitlichen zu den Stirnseiten des Metallgehäuses hin offene Anschlussabschnitte münden. Gegenüber diesen Anschlussabschnitten sind an den seitlichen Stirnflächen des Metallgehäuses 1 außen jeweils Koaxialstecker-Kupplungen 4 - 7 befestigt, deren Innenleiter in Anschlussabschnitte des flachen Raums 3 des Metallgehäuses ragen. Dieser flache Metallgehäuseraum 3 ist gemäß Fig. 2 von oben mittels eines flachen Deckels 2 geschlossen und über nicht dargestellte Schrauben (Löcher 8) hochfrequenzdicht mit dem Gehäuse 1 verschraubt. Die vier Koaxialleitungs-Kupplungen 4 bis 7 bilden jeweils die vier Hochfrequenztore des Richtkopplers. Fig. 1 shows in perspective plan view of a directional coupler according to the invention with a flat metal housing 1 with removed cover 2. In the surface of this metal housing 1, a flat space 3 is milled out, in the lateral open to the front sides of the metal housing open connection sections. Opposite these connection sections, coaxial connector couplings 4 - 7 are fastened to the lateral end faces of the metal housing 1, the inner conductors of which project into connecting sections of the flat space 3 of the metal housing. This flat metal housing space 3 is according to Fig. 2 closed from above by means of a flat lid 2 and screwed high-frequency-tight manner with the housing 1 via screws (holes 8), not shown. The four coaxial line couplings 4 to 7 each form the four high-frequency ports of the directional coupler.

Die eigentlichen gekoppelten Leitungen werden durch zwei flache Blech-Bandleiter 9 und 10 gebildet, die im Koppelbereich zwischen E1 und E2 mit ihren Breitseiten einander zugewandt im Abstand nebeneinander angeordnet sind.The actual coupled lines are formed by two flat sheet metal strip conductors 9 and 10, which are arranged in the coupling region between E1 and E2 with their broad sides facing each other at a distance next to each other.

Wie Fig. 2 zeigt, sind diese beiden Bandleiter 9 und 10 im Koppelbereich hochkant stehend mit ihren Breitseiten senkrecht zum Boden des Gehäuseraumes 3 und senkrecht zur Innenfläche des aufgesetzten Deckels 2 im Metallgehäuseraum 3 gehalten. An den Enden des Koppelbereichs E1-E2 sind diese flachen Blech-Bandleiter seitlich nach außen gebogen und an den Innenleiterenden der Koaxialleiter-Kupplungen 4 bis 7 befestigt. Diese flachen Bandleiter bestehen aus einem federnd nachgiebigem Blechmaterial, beispielsweise aus Kupferberyllium.As Fig. 2 shows, these two band conductors 9 and 10 are upright in the coupling region standing with their broad sides perpendicular to the bottom of the housing space 3 and held perpendicular to the inner surface of the attached lid 2 in the metal housing space 3. At the ends of the coupling region E1-E2, these flat sheet metal strip conductors are laterally bent outwards and fastened to the inner conductor ends of the coaxial conductor couplings 4 to 7. These flat band conductors consist of a resilient sheet material, such as copper beryllium.

Fig. 3 zeigt die Draufsicht eines noch nicht abgebogenen Bandleiters. Die Breite ist hier zum besseren Verständnis etwa fünffach vergrößert. Die beiden Anschlussenden 11 und 12, die beim Zusammenbau abgebogen werden, besitzen etwa die gleiche Breite. Der eigentliche Koppelabschnitt zwischen E1 und E2 besitzt allmählich zunehmende Breite. Am Anfang E1 des Koppelabschnittes ist die Breite verjüngt und nimmt nur allmählich bis zum Koppelbereichsende E2 wieder zu, bis die Breite des Anschlussendes 12 erreicht ist. Die Breite der Anschlussenden 11 und 12 und der jeweilige Abstand zum Boden des Gehäuseraumes 3 bzw. zur Innenfläche des Deckels 2 sind so gewählt, dass die Anschlussenden jeweils den gleichen Wellenwiderstand wie die anschließenden Koaxialleitungs-Kupplungen besitzen, im allgemeinen 50 Ohm. Die Zunahme der Breite der Bandleiter 9, 10, die in Fig. 3 abschnittsweise erfolgt, ist annähernd linear, sie kann natürlich auch kontinuierlich erfolgen. Fig. 3 shows the top view of a not yet bent strip conductor. The width is increased here for better understanding about five times. The two terminal ends 11 and 12, which are bent during assembly, have approximately the same width. The actual coupling section between E1 and E2 has gradually increasing width. At the beginning E1 of the coupling section, the width is tapered and increases only gradually until the coupling end E2, until the width of the terminal end 12 is reached. The width of the terminal ends 11 and 12 and the respective distance to the bottom of the housing space 3 and to the inner surface of the lid 2 are chosen so that the terminal ends each have the same characteristic impedance as the subsequent coaxial line couplings, generally 50 ohms. The increase in the width of the strip conductors 9, 10, which in Fig. 3 is done in sections, is approximately linear, it can of course also be continuous.

Die beiden Bandleiter 9 und 10 sind gemäß Fig. 1 im Koppelbereich zwischen E1 und E2 in einem von E1 nach E2 etwa exponentiell zunehmenden Abstand voneinander angeordnet. Ihre Stirnseiten sind gemäß Fig. 2 in einem vorbestimmten Abstand gegenüber Deckel und Gehäuseraumboden gehalten und bilden wiederum ein vorbestimmtes Wellenwiderstandssystem. Dieser etwa exponentielle Verlauf des Abstandes zwischen den beiden Bandleitern beginnend mit der engsten Stelle am Anfang E1 des Koppelbereichs und der weitesten Stelle am Ende E2 des Koppelbereichs gewährleistet zusammen mit dem in Fig. 3 dargestellten Verlauf der Breite der Bandleiter 9, 10, dass das Produkt aus ZEven und Zodd an jeder Stelle des Koppelsystems gleich dem Quadrat des Systemwellenwiderstandes, beispielsweise 50 Ohm, ist. Damit ist eine gute Anpassung und Isolation des Richtkopplers gewährleistet.The two band conductors 9 and 10 are according to Fig. 1 in the coupling region between E1 and E2 in an E1 to E2 approximately exponentially increasing distance from each other. Their faces are according to Fig. 2 held at a predetermined distance from the lid and housing space floor and in turn form a predetermined characteristic impedance system. This approximately exponential course of the distance between the two strip conductors beginning with the narrowest point at the beginning E1 of the coupling region and the widest point at the end E2 of the coupling region, together with the in Fig. 3 illustrated curve of the width of the band conductors 9, 10, that the product of Z Even and Z odd at each point of the coupling system is equal to the square of the system wave resistance, for example, 50 ohms. This ensures a good adaptation and isolation of the directional coupler.

Die beiden flachen Blech-Bandleiter 9 und 10 werden im flachen Raum 3 in den vorgegebenen Abständen gegenüber Metallgehäuse 1 und Deckel 2 über Stützelemente aus Isoliermaterial gehalten. Im gezeigten Ausführungsbeispiel nach Fig. 1 sind die vom Koppelbereich E1-E2 jeweils seitlich nach außen gebogenen Anschlussenden 11, 12 jeweils über kleine Kunststoffrollen 13 gehalten, die am Metallgehäuse 1 beispielsweise angeklebt sind und die beidseitig an den Breitseiten der Bandleiter 9, 10 anliegen und vorzugsweise ebenfalls mit den Bandleitern verklebt sind. Im eigentlichen Koppelbereich E1-E2 sind diese Bandleiter 9, 10 über Stößel 14 aus Isoliermaterial gehalten, die längs der Bandleiter im Abstand verteilt sind und in Bohrungen der Längsstirnseiten des Metallgehäuses 1 geführt sind. Diese Stößel 14 liegen mit ihren inneren Enden an den nach außen gewandten Breitseiten der Bandleiter 9, 10 an.The two flat sheet metal strip conductors 9 and 10 are held in the flat space 3 in the predetermined distances from the metal housing 1 and cover 2 via support elements made of insulating material. In the illustrated embodiment according to Fig. 1 are each of the coupling region E1-E2 laterally outwardly bent terminal ends 11, 12 each held on small plastic rollers 13 which are glued to the metal housing 1, for example, and on both sides of the broad sides of the band conductor 9, 10 and preferably are also glued to the strip conductors , In the actual coupling region E1-E2, these strip conductors 9, 10 are held by plungers 14 made of insulating material, which are distributed along the strip conductors at a distance and are guided in bores of the longitudinal end faces of the metal housing 1. These plungers 14 bear with their inner ends against the outwardly facing broad sides of the strip conductors 9, 10.

Durch Axialverschieben dieser Stößel kann der Abstand zwischen den Bandleitern exakt eingestellt werden. Die Enden der Stößel sind vorzugsweise wiederum an den Breitseiten der Bandleiter angeklebt, bei entsprechender Vorspannung der federnd nachgiebigen Bandleiter genügt ggf. auch nur das Anlegen der Enden an den Bandleitern zur Stabilisierung. Bei dem dargestellten Aufbau sind die Tore 4 und 5 sowie die Tore 6 und 7 miteinander verkoppelt und die sich diagonal gegenüberliegenden Tore 4 und 6 sowie 5 und 7 sind bei Abschluss der jeweils anderen Tore voneinander isoliert.By axial displacement of these plungers, the distance between the strip conductors can be set exactly. The ends of the plungers are preferably in turn to the Glued broad sides of the band conductor, with appropriate bias of the resilient strip conductor is possibly sufficient only the application of the ends of the strip conductors for stabilization. In the illustrated construction, the gates 4 and 5 and the gates 6 and 7 are coupled together and the diagonally opposite gates 4 and 6 and 5 and 7 are isolated from each other at the conclusion of each other gates.

Über diese Kunststoffrollen 13 und Stößel 14 werden die Bandleiter 9, 10 in ihrer vorbestimmten Stellung innerhalb des Metallgehäuseraumes 3 fixiert und es wird eine gute mechanische Stabilität erreicht. Eventuelle elektrische Einflüsse dieser Kunststoffteile, beispielsweise der Stößel 14, können durch entsprechende kleine Einschnürungen an den Rändern der Bandleiter 9, 10 kompensiert werden.About this plastic rollers 13 and plunger 14, the band conductors 9, 10 fixed in its predetermined position within the metal housing space 3 and it is achieved a good mechanical stability. Possible electrical influences of these plastic parts, for example the plunger 14, can be compensated by corresponding small constrictions at the edges of the strip conductors 9, 10.

Fig. 4 zeigt eine andere Ausführungsform eines erfindungsgemäßen Richtkopplers und zwar ist hier nur einer der Bandleiter gebogen und der andere Bandleiter ist gerade ausgeführt. Am schmalen Stirnende des Metallgehäuses 1 ist ein robuster Testport 20 angebracht, dessen Innenleiter mit dem geraden Bandleiter verbunden ist. Das gegenüberliegende Ende des geraden Bandleiters ist mit einer Koaxialleitungskupplung verbunden, die am gegenüberliegenden stirnseitigen Ende des Metallgehäuses angebracht ist. Der übrige Aufbau und die Halterung der Bandleiter im Gehäuseraum ist wie bei Fig. 1. Fig. 4 shows another embodiment of a directional coupler according to the invention and although only one of the band conductor is bent here and the other band conductor is currently running. At the narrow front end of the metal housing 1, a robust test port 20 is mounted, the inner conductor is connected to the straight strip conductor. The opposite end of the straight strip conductor is connected to a Koaxialleitungskupplung which is mounted on the opposite end face of the metal housing. The rest of the structure and the support of the band conductor in the housing space is as in Fig. 1 ,

Fig. 4 zeigt zusätzliche Ferritstrukturen 21, die zur Absorbierung von höheren Moden längs des Koppelbereiches an den Längsstirnwänden des Metallgehäuseraumes angebracht sind. Damit kann der Richtkoppler auch noch betrieben werden, wenn theoretisch bei den gewählten Abmessungen schon höhere Wellenmoden ausbreitungsfähig sind. Fig. 4 shows additional ferrite structures 21, which are attached to the longitudinal end walls of the metal housing space for absorbing higher modes along the coupling region. Thus, the directional coupler can also be operated when theoretically higher wave modes are capable of propagation at the selected dimensions.

Die erfindungsgemäße Richtkoppleranordnung eignet sich besonders gut auch zur unmittelbaren Integration in eine bestehende Baugruppe, beispielsweise eine Eichleitung. Außerdem können in den Richtkoppler zusätzliche Abschlusswiderstände integriert werden, wenn nur in einer Richtung ein Signal ausgekoppelt werden soll. Auch die Intergration eines Dämpfungsgliedes an einem oder mehreren Anschlusstoren ist möglich. Solche Abschlusswiderstände bzw. Dämpfungsglieder können beispielsweise unmittelbar in die Anschlussenden 11, 12 der Bandleiter 9, 10 integriert werden.The directional coupler according to the invention is particularly well suited for direct integration into a existing assembly, such as an attenuator. In addition, additional terminating resistors can be integrated into the directional coupler if a signal is to be coupled out in only one direction. The integration of an attenuator at one or more connection ports is also possible. Such terminating resistors or attenuators can for example be integrated directly into the terminal ends 11, 12 of the strip conductors 9, 10.

Claims (9)

  1. Directional coupler with two coupled lines arranged in a flat housing chamber (3) of an enclosed housing (1, 2) alongside one another in the longitudinal direction and disposed at a spacing distance from one another within the coupling region, the ends of which are connected to connection ports (4 - 7) mounted laterally on the housing,
    wherein the coupled lines are formed as flat sheet-metal strip conductors (9, 10), which are arranged in the coupling region (E1-E2) with their broad sides facing towards one another, alongside one another at a spacing distance and held by several supporting elements (13, 14) made of insulating material in a free-floating manner at a spacing distance from the opposing internal walls of the flat housing chamber (3) within the latter,
    characterised in that
    the strip conductors (9, 10) are each held in the coupling region (E1 to E2) by several supporting elements (14) made of insulating material provided in the longitudinal walls of the housing, wherein the ends of the supporting elements (14) are fixed to the broad sides of sheet-metal strip conductors (9, 10).
  2. Directional coupler according to claim 1,
    characterised in that
    the housing is a metallic housing and that the strip conductors (9, 10) are held in the coupling region on edge, standing with their broad sides perpendicular to the base (1) and cover (2) of the flat metallic-housing chamber (3) within the latter.
  3. Directional coupler according to claim 1 or 2,
    characterised in that
    at least one strip conductor (9, 10) is curved relative to the opposing strip conductor in such a manner that, starting from the beginning of the coupling region (E1), the spacing distance of the strip conductor within the coupling region (E1-E2) increases approximately exponentially towards the end of the coupling region (E2).
  4. Directional coupler according to any one of the preceding claims,
    characterised in that
    the width of the two strip conductors (9, 10) is of the same magnitude in each case at the connecting ends (11, 12) and increases within the coupling region, starting with a relatively smaller width by comparison with the connecting-end width at the start of the coupling region (E1), towards the connecting-end width at the end of the coupling region (E2).
  5. Directional coupler according to any one of the preceding claims,
    characterised in that
    the strip conductors (9, 10) consist of a springy, resilient sheet metal, in particular, copper beryllium.
  6. Directional coupler according to any one of the preceding claims,
    characterised in that
    the housing is a metallic housing and that the strip conductors (9, 10) are held at the connecting ends (11, 12) via insulating-material elements (13) attached to the metallic housing (1).
  7. Directional coupler according to any one of the preceding claims,
    characterised in that
    the housing is a metallic housing and that the longitudinal walls of the metallic-housing chamber are coated with ferrite material (21).
  8. Directional coupler according to any one of the preceding claims,
    characterised in that
    the housing is a metallic housing and that the strip conductors (9, 10) are each curved outwards at the start and end of the coupling region and are connected to the internal conductors of coaxial-line couplings (4 - 7, 20) mounted laterally on the metallic housing (1).
  9. Directional coupler according to any one of the preceding claims,
    characterised in that
    a terminating resistor and/or an attenuation element is integrated at least at one connecting end of at least one of the two strip conductors (9, 10).
EP07786579A 2006-08-14 2007-08-06 Directional coupler Active EP2052434B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006038029A DE102006038029A1 (en) 2006-08-14 2006-08-14 directional coupler
PCT/EP2007/006936 WO2008019777A1 (en) 2006-08-14 2007-08-06 Directional coupler

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EP2052434A1 EP2052434A1 (en) 2009-04-29
EP2052434B1 true EP2052434B1 (en) 2009-10-14

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US (1) US7859361B2 (en)
EP (1) EP2052434B1 (en)
DE (2) DE102006038029A1 (en)
WO (1) WO2008019777A1 (en)

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DE102009051370A1 (en) 2009-06-04 2010-12-09 Rohde & Schwarz Gmbh & Co Kg Measuring coupler in stripline technology
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DE102006038029A1 (en) 2008-02-21
DE502007001760D1 (en) 2009-11-26
US7859361B2 (en) 2010-12-28
US20090206947A1 (en) 2009-08-20
EP2052434A1 (en) 2009-04-29

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