EP0302479B1 - Strip line coupling arrangement - Google Patents

Strip line coupling arrangement Download PDF

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Publication number
EP0302479B1
EP0302479B1 EP88112654A EP88112654A EP0302479B1 EP 0302479 B1 EP0302479 B1 EP 0302479B1 EP 88112654 A EP88112654 A EP 88112654A EP 88112654 A EP88112654 A EP 88112654A EP 0302479 B1 EP0302479 B1 EP 0302479B1
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EP
European Patent Office
Prior art keywords
coupler
strip conductor
conductor tracks
conductor track
coupling arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88112654A
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German (de)
French (fr)
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EP0302479A1 (en
Inventor
Helmut Dipl.-Ing. Junghans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT88112654T priority Critical patent/ATE96944T1/en
Publication of EP0302479A1 publication Critical patent/EP0302479A1/en
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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
    • H01P5/185—Edge coupled lines

Definitions

  • the invention relates to a strip line coupler for integrated high-frequency circuits with a plurality of coupled strip conductor tracks in a spiral shape with a closely adjacent course, the length of which is divided into two coupler halves and each coupler half is applied to a dielectric substrate.
  • a coupler is known from US Pat. No. 3,999,150.
  • the invention has for its object to provide a simple stripline coupler with good insulation in its construction.
  • FIG. 1 shows a top view of one half of a coupler with a quadruple stripline structure.
  • the four conductor tracks L1, L2, L3 and L4 are applied on a dielectric substrate S1, for example Al2O3 ceramic on the front in strip line technology in a closely adjacent course to one another in a rectangular spiral shape.
  • the back of the substrate S1 is metallized over the entire surface.
  • metallized contacting areas 1 to 7 for contacting with connection elements (not shown in the figure) are applied, which, for example, with a pincer-shaped end region, enclose the substrate on the long side and rest in contact on the metallization areas.
  • the conductor tracks L1 and L3 are guided to the contacting area 1, the conductor tracks L2 and L4 via a connecting line 10 to the contacting area 3.
  • the line ends of the conductor tracks L2 and L4 are connected via the plated-through holes 8 and 9 and a connecting line 15 applied to the rear of the substrate within a recess 17 of the metallization.
  • the line ends located in the inner region of the spiral are plated through-holes 11, 12, 13 and 14 to the rear of the substrate S1, the entire surface metallization of the rear surface having a corresponding cutout 16 in the area of these holes.
  • the second coupler half is constructed in accordance with the conductor structure shown in FIG. 1.
  • the substrate S2 carrying the second coupler half is placed with its metallized side on the metallized side of the first substrate S1 and connected in a contacting manner (cf. the illustration in FIG. 2).
  • the outer ends of the conductor tracks are on the right-hand side and, in the same way as in the first half of the coupler, are led to the contacting areas 5 and 7.
  • a bundle is defined as the number of conductor tracks of the coupler. In the exemplary embodiment shown, these are four conductor tracks, but any other number is also possible. This distance s between adjacent conductor bundles is equal to the distance of the conductor paths within a conductor bundle.
  • Fig. 3 shows a schematic representation of a coupler with 2-fold stripline structure in a planar arrangement.
  • the two halves of the coupler are wound in a spiral Instead of back to back arranged planar, ie adjacent on the same side of a substrate S3, the back of which is metallized over the entire surface.
  • the conductor tracks L5, L6 and L7, L8 of the two coupler halves which are applied in a rectangular spiral shape, are wound in the same direction, counterclockwise in the exemplary embodiment.
  • the line ends located in the inner region of the spiral are connected to one another via bond connections 18, 19, this again taking place in such a way that the outer strip conductor L5 or L7 of one coupler half is connected to the inner strip conductor L6 or L8 of the other coupler half.
  • the total lengths of both strip conductors of the coupler are therefore the same.
  • the distance s between the two coupler halves is equal to the distance between the conductor tracks within a conductor track bundle.

Abstract

The invention relates to a stripline coupling arrangement for integrated radio-frequency circuits, in which a plurality of coupled striplines running closely adjacent to one another, in the form of a spiral, are mounted on a dielectric substrate (S1). Such a coupling arrangement structure has inadequate insulation, however, as a result of the different length of the spirally arranged conductor tracks. In order to improve the insulation, it is provided that the conductor tracks of the coupling arrangement are split into two coupling arrangement halves, whose conductor ends (11, 12, 13, 14) located in the inner region of the spirals are connected to one another such that the conductor ends of the one coupling arrangement half are joined in the sequence from the outer to the inner conductor track to the conductor ends of the other coupling arrangement half, in the sequence from the inner to the outer conductor track. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Streifenleitungskoppler für integrierte Hochfrequenzschaltkreise mit mehreren gekoppelten Streifenleiterbahnen in Spiralform mit eng benachbartem Verlauf zueinander, die in ihrer Länge in zwei Kopplerhälften aufgeteilt sind und jede Kopplerhälfte auf einem dielektrischen Substrat aufgebracht ist. Ein solcher Koppler ist durch die US-PS 3 999 150 bekannt.The invention relates to a strip line coupler for integrated high-frequency circuits with a plurality of coupled strip conductor tracks in a spiral shape with a closely adjacent course, the length of which is divided into two coupler halves and each coupler half is applied to a dielectric substrate. Such a coupler is known from US Pat. No. 3,999,150.

Ferner ist eine Kopplerstruktur mit seitengekoppelten mehrfachen Streifenleitungen in der DE-OS 28 39 874 beschrieben. Eine solche Kopplerstruktur besitzt jedoch eine unzureichende Isolation, bedingt durch die unterschiedliche Länge der spiralförmig angeordneten Leiterbahnen. Dabei kann bei entsprechend großer Wicklungszahl der äußere Streifenleiter erheblich länger sein als der innere Streifenleiter. Durch die unterschiedlichen Streifenleiterlängen entstehen an den Koppler-Ein/Ausgängen unerwünschte Reflexionen, welche die Isolation insbesondere im hohen Frequenzbereich stark herabsetzen.Furthermore, a coupler structure with side-coupled multiple strip lines is described in DE-OS 28 39 874. However, such a coupler structure has insufficient insulation due to the different lengths of the spirally arranged conductor tracks. With a correspondingly large number of windings, the outer strip conductor can be considerably longer than the inner strip conductor. Due to the different stripline lengths, undesired reflections occur at the coupler inputs / outputs, which greatly reduce the insulation, especially in the high frequency range.

Der Erfindung liegt die Aufgabe zugrunde, einen in seinem Aufbau einfachen Streifenleitungskoppler mit guter Isolation zu schaffen.The invention has for its object to provide a simple stripline coupler with good insulation in its construction.

Diese Aufgabe wird mit einem Streifenleitungskoppler der eingangs beschriebenen Art und gemäß den kennzeichnenden Mermale der Ansprüche 1 oder 3 gelöst.This object is achieved with a stripline coupler of the type described in the introduction and in accordance with the characterizing features of claims 1 or 3.

Vorteilhafte Ausgestaltungen und Weiterbildungen des Erfindungsgegenstandes sind in den Unteransprüchen angegeben.Advantageous refinements and developments of the subject matter of the invention are specified in the subclaims.

Nachstehend wird die Erfindung anhand in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing.

Es zeigen

Fig. 1
die Leiterbahnstruktur einer Kopplerhälfte,
Fig. 2
einen Streifenleitungskoppler in perspektifischer Darstellung der Einzelelemente und
Fig. 3
eine Leiterbahnstruktur in planarer Anordnung.
Show it
Fig. 1
the conductor structure of a coupler half,
Fig. 2
a stripline coupler in a perspective representation of the individual elements and
Fig. 3
a conductor track structure in a planar arrangement.

Fig. 1 zeigt in einer Draufsicht eine Hälfte eines Kopplers mit 4-facher Streifenleiterstruktur. Dabei sind auf einem dielektrischen Substrat S1, beispielsweise Al₂O₃ -Keramik auf der Vorderseite die vier Leiterbahnen L1, L2, L3 und L4 in Streifenleitungstechnik in eng benachbartem Verlauf zueinander in rechteckförmiger Spiralform aufgebracht. Die Rückseite des Substrats S1 ist ganzflächig metallisiert. Entlang der Längsseite des Substrats S1 sind metallisierte Kontaktierungsflächen 1 bis 7 zur Kontaktierung mit Anschlußelementen (in der Fig. nicht dargestellt) aufgebracht, die mit ihrem beispielsweise zangenförmig ausgebildeten Endbereich das Substrat an der Längsseite umschließen und kontaktierend auf den Metallisierungsflächen aufliegen. Im gezeigten Ausführungsbeispiel sind die Leiterbahnen L1 und L3 an die Kontaktierungsfläche 1, die Leiterbahnen L2 und L4 über eine Anschlußleitung 10 an die Kontaktierungsfläche 3 geführt. Die Verbindung der Leitungsenden der Leiterbahnen L2 und L4 erfolgt dabei über die Durchkontaktierungen 8 und 9 und eine an der Rückseite des Substrats innerhalb einer Aussparung 17 der Metallisierung aufgebrachten Verbindungsleitung 15.1 shows a top view of one half of a coupler with a quadruple stripline structure. The four conductor tracks L1, L2, L3 and L4 are applied on a dielectric substrate S1, for example Al₂O₃ ceramic on the front in strip line technology in a closely adjacent course to one another in a rectangular spiral shape. The back of the substrate S1 is metallized over the entire surface. Along the long side of the substrate S1, metallized contacting areas 1 to 7 for contacting with connection elements (not shown in the figure) are applied, which, for example, with a pincer-shaped end region, enclose the substrate on the long side and rest in contact on the metallization areas. In the exemplary embodiment shown, the conductor tracks L1 and L3 are guided to the contacting area 1, the conductor tracks L2 and L4 via a connecting line 10 to the contacting area 3. The line ends of the conductor tracks L2 and L4 are connected via the plated-through holes 8 and 9 and a connecting line 15 applied to the rear of the substrate within a recess 17 of the metallization.

Die im Innenbereich der Spirale liegenden Leitungsenden sind über Durchkontaktierungen 11, 12, 13 und 14 zur Rückseite des Substrats S1 durchkontaktiert, wobei im Bereich dieser Durchkontaktierungen die ganzflächige Metallisierung der Rückseite eine entsprechende Aussparung 16 aufweist.The line ends located in the inner region of the spiral are plated through-holes 11, 12, 13 and 14 to the rear of the substrate S1, the entire surface metallization of the rear surface having a corresponding cutout 16 in the area of these holes.

Die zweite Kopplerhälfte ist entsprechend der in Fig. 1 gezeigten Leiterstruktur aufgebaut. In einer um 180° um die parallel zur Schmalseite des Substrats verlaufende Mittelachse M gedrehten Lage wird das die zweite Kopplerhälfte tragende Substrat S2 mit seiner metallisierten Seite auf die metallisierte des ersten Substrats S1 aufgelegt und kontaktierend verbunden (vgl. hierzu die Darstellung in Fig. 2). Bei dem in der Figur unten liegenden Substrat S2 befinden sich die äußeren Leitungsenden der Leiterbahnen an der rechten Seite und sind in entsprechender Weise wie bei der ersten Kopplerhälfte an die Kontaktierungsflächen 5 und 7 geführt. Durch die Drehung des zweiten Substrats S2 um 180° gegenüber dem ersten Substrat S1 ergibt sich für die im Innenbereich der Spirale liegenden Leitungsenden eine solche Lage, daß die den Leitungsenden zugehörigen Durchkontaktierungen 11 bis 14 beider Kopplerhälften einander in umgekehrter Reihenfolge gegenüberliegen. Das bedeutet also, daß die Leiterbahn L1 der ersten Kopplerhälfte mit der Leiterbahn L4 der zweiten Kopplerhälfte verbunden ist und in entsprechender Weise die Leiterbahnen L2, L3 und L4 der ersten Kopplerhälfte mit den Leiterbahnen L3, L2 und L1 der zweiten Kopplerhälfte verbunden sind. Durch die derart vorgenommene Verbindung der Leiterbahnen der beiden Kopplerhälften wird erreicht, daß insgesamt jede der vier spiralförmig aufgewickelten Leiterbahnen gleich lang ist, wodurch sich eine hohe Isolation ergibt.The second coupler half is constructed in accordance with the conductor structure shown in FIG. 1. In a 180 ° around the parallel to the narrow side of the central axis M, the substrate S2 carrying the second coupler half is placed with its metallized side on the metallized side of the first substrate S1 and connected in a contacting manner (cf. the illustration in FIG. 2). In the case of the substrate S2 in the figure below, the outer ends of the conductor tracks are on the right-hand side and, in the same way as in the first half of the coupler, are led to the contacting areas 5 and 7. The rotation of the second substrate S2 by 180 ° with respect to the first substrate S1 results in a position for the line ends lying in the inner region of the spiral such that the vias 11 to 14 of both coupler halves associated with the line ends lie opposite one another in reverse order. This means that the conductor path L1 of the first coupler half is connected to the conductor path L4 of the second coupler half and, in a corresponding manner, the conductor tracks L2, L3 and L4 of the first coupler half are connected to the conductor tracks L3, L2 and L1 of the second coupler half. By connecting the conductor tracks of the two coupler halves in this way, it is achieved that each of the four spirally wound conductor tracks has the same length, which results in high insulation.

Durch die Aufteilung der Leiterbahnen in zwei Kopplerhälften, die masseseitig zusammengefügt sind, ergibt sich auch ein sehr platzsparender Aufbau des Kopplers. Dieser Vorteil wird zusätzlich noch verbessert durch den geringen gegenseitigen Abstand zwischen zwei benachbarten Leiterbahnbündeln. Ein Bündel ist dabei definiert als Anzahl der Leiterbahnen des Kopplers. Dies sind im dargestellten Ausführungsbeispiel vier Leiterbahnen, jedoch ist auch eine beliebig andere Anzahl möglich. Dieser Abstand s zwischen benachbarten Leiterbahnbündeln ist gleich dem Abstand der Leiterbahnen innerhalb eines Leiterbahnbündels.The division of the conductor tracks into two coupler halves which are joined together on the ground side also results in a very space-saving construction of the coupler. This advantage is further improved by the small mutual distance between two adjacent conductor bundles. A bundle is defined as the number of conductor tracks of the coupler. In the exemplary embodiment shown, these are four conductor tracks, but any other number is also possible. This distance s between adjacent conductor bundles is equal to the distance of the conductor paths within a conductor bundle.

Fig. 3 zeigt in einer schematischen Darstellung einen Koppler mit 2-facher Streifenleiterstruktur in planarer Anordnung. Dabei sind die beiden spiralförmig aufgewickelten Kopplerhälften statt Rückseite an Rückseite planar angeordnet, d. h. benachbart auf der selben Seite eines Substrats S3, dessen Rückseite ganzflächig metallisiert ist. Die in rechteckförmiger Spiralform aufgebrachten Leiterbahnen L5, L6 und L7, L8 der beiden Kopplerhälften sind in derselben Richtung aufgewickelt, im Ausführungsbeispiel entgegen dem Uhrzeigersinn. Die im Innenbereich der Spirale liegenden Leitungsenden sind über Bondverbindungen 18, 19 miteinander verbunden, wobei dies wiederum in der Weise erfolgt, daß der äußere Streifenleiter L5 bzw. L7 der einen Kopplerhälfte mit dem inneren Streifenleiter L6 bzw. L8 der anderen Kopplerhälfte verbunden ist. Damit sind die Gesamtlängen beider Streifenleiter des Kopplers gleich. Der Abstand s zwischen den beiden Kopplerhälften ist gleich dem Abstand der Leiterbahnen innerhalb eines Leiterbahnbündels.Fig. 3 shows a schematic representation of a coupler with 2-fold stripline structure in a planar arrangement. The two halves of the coupler are wound in a spiral Instead of back to back arranged planar, ie adjacent on the same side of a substrate S3, the back of which is metallized over the entire surface. The conductor tracks L5, L6 and L7, L8 of the two coupler halves, which are applied in a rectangular spiral shape, are wound in the same direction, counterclockwise in the exemplary embodiment. The line ends located in the inner region of the spiral are connected to one another via bond connections 18, 19, this again taking place in such a way that the outer strip conductor L5 or L7 of one coupler half is connected to the inner strip conductor L6 or L8 of the other coupler half. The total lengths of both strip conductors of the coupler are therefore the same. The distance s between the two coupler halves is equal to the distance between the conductor tracks within a conductor track bundle.

Claims (4)

  1. Stripline coupler for integrated radio-frequency circuits constructed from two coupling halves, which comprise a plurality of coupled strip conductor tracks (L₁, L₂,...) in spiral form running closely adjacent to one another and in which each coupler half is fitted on a dielectric substrate (S₁, S₂), characterised in that the strip conductor tracks (L₁, L₂,...) of the two coupler halves are in each case fitted on the outer surface of the two substrates which are metallised over the entire surface on one side, and in that the ends of the strip conductor tracks located on the inside in the spiral are connected to one another via through-plated holes in the substrates which lie with their metallised side on one another, in such a manner that the ends of the strip conductor tracks of the one coupler half are joined together in the sequence from the outer to the inner strip conductor track of a conductor track bundle with the ends of the strip conductor track of the other coupler half in the sequence from the inner to the outer strip conductor track of the corresponding conductor track bundle.
  2. Stripline coupler according to Claim 1, characterised in that the metallisation of the metallised substrate side has recesses (16) in the region of the through-plated holes.
  3. Stripline coupler for integrated radio-frequency circuits constructed from two coupling halves which comprise a plurality of coupled strip conductor tracks (L₅, L₆) in spiral form running closely adjacent to one another, characterised in that each coupler half is fitted on a dielectric substrate, and in that the strip conductor tracks of the two coupler halves are in each case fitted on the outer surface of the substrate which is metallised over the entire surface on one side, and in that the ends of the strip conductor tracks located on the inside in the spiral are connected to one another via strip elements (19) in such a manner that the ends of the strip conductor tracks (L₅, L₆) of the one coupler half are joined together in the sequence from the outer to the inner strip conductor track of a conductor track bundle with the ends of the strip conductor tracks (L₇, L₈) of the other coupler half in the sequence from the inner to the outer strip conductor track of the corresponding conductor track bundle.
  4. Stripline coupler according to one of Claims 1 to 3, characterised in that the distance between the strip conductor tracks of adjacent conductor track bundles is equal to the distance between the strip conductor tracks within a conductor track bundle.
EP88112654A 1987-08-06 1988-08-03 Strip line coupling arrangement Expired - Lifetime EP0302479B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112654T ATE96944T1 (en) 1987-08-06 1988-08-03 STRIPLINE COUPLER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3726237 1987-08-06
DE3726237 1987-08-06

Publications (2)

Publication Number Publication Date
EP0302479A1 EP0302479A1 (en) 1989-02-08
EP0302479B1 true EP0302479B1 (en) 1993-11-03

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ID=6333239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112654A Expired - Lifetime EP0302479B1 (en) 1987-08-06 1988-08-03 Strip line coupling arrangement

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EP (1) EP0302479B1 (en)
AT (1) ATE96944T1 (en)
DE (1) DE3885370D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3125691B2 (en) * 1995-11-16 2001-01-22 株式会社村田製作所 Coupled line element

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215226B (en) * 1961-08-25 1966-04-28 Siemens Ag Directional coupler, consisting of a through line and a coupling line
FR95372E (en) * 1967-04-28 1970-09-11 Thomson Houston Comp Francaise Improvements to directional couplers by superposition of lines.
US3460069A (en) * 1968-01-12 1969-08-05 Ibm Directional coupler unit having a plurality of stripline couplers
DD109127A1 (en) * 1973-12-21 1974-10-12
US3999150A (en) * 1974-12-23 1976-12-21 International Business Machines Corporation Miniaturized strip-line directional coupler package having spirally wound coupling lines
FR2449340A1 (en) * 1979-02-13 1980-09-12 Thomson Csf MICLAN-LINKED COUPLED LINES MICROWAVE CIRCUIT AND DEVICE COMPRISING SUCH A CIRCUIT
US4614922A (en) * 1984-10-05 1986-09-30 Sanders Associates, Inc. Compact delay line

Also Published As

Publication number Publication date
DE3885370D1 (en) 1993-12-09
EP0302479A1 (en) 1989-02-08
ATE96944T1 (en) 1993-11-15

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