EP1132995A1 - Balancing network - Google Patents

Balancing network Download PDF

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Publication number
EP1132995A1
EP1132995A1 EP01301686A EP01301686A EP1132995A1 EP 1132995 A1 EP1132995 A1 EP 1132995A1 EP 01301686 A EP01301686 A EP 01301686A EP 01301686 A EP01301686 A EP 01301686A EP 1132995 A1 EP1132995 A1 EP 1132995A1
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EP
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Prior art keywords
lines
gate
adjacent
symmetrical
asymmetrical
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Granted
Application number
EP01301686A
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German (de)
French (fr)
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EP1132995B1 (en
Inventor
Hardial Dr. Gill
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Telent GmbH
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Marconi Communications GmbH
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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
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices

Definitions

  • the present invention relates to a balun, consisting of side by side, coupled planar lines with an asymmetrical connection gate and two symmetrical connection gates.
  • Symmetry elements make transitions in a known manner between symmetrical and asymmetrical Transmission lines. From a symmetrical line one speaks when a signal transmitted via it does not Has ground as a reference potential. Against is one unbalanced transmission line on one side with ground connected so that a signal transmitted over it is ground as a reference potential. Symmetry links of this type e.g. at the inputs and outputs of double push-pull mixers or modulators etc. used.
  • balun One set out at the outset, made up of four coupled together planar lines existing balun is from the DE 197 29 761 A1 known.
  • This balun consists of two 3db couplers, each with two over a length of ⁇ / 4 coupled planar lines.
  • They who Both couplers are in the form of a bipolar bandpass filter trained, one in an open Circuit configuration and the other in one short-circuit configuration is configured.
  • the two quarter-wave couplers are thus together connected that a 3-port symmetry arises, the one connection for unbalanced signals and two Has connections for balanced signals.
  • Line couplers in an open circuit configuration are the opposite ends of the two lines idling. Another end of the two lines serves as symmetrical connection.
  • the opposite end of the other line is short-circuited with one end of the Circuit configuration executed line coupler connected.
  • Two of this line coupler are each other opposite ends of the two leads with ground contacted, and another end of a line forms one another connection for balanced signals.
  • the two interconnected ends of the two Line couplers form the connection gate for asymmetrical Signals.
  • the invention has for its object a space-saving and as easy to manufacture as possible specify.
  • Such a balun is according to the features of Claim 1 constructed as follows. There are three side-by-side, coupled planar lines available. One end of the middle of the three lines forms the asymmetrical connection gate, the ones lying next to it Ends of the two outer lines at ground potential lie. The other two ends of the outer leads are also at ground potential, and the middle one Line ends there with an idle. Each of the two outer lines is interrupted at half the length and at this point has two connections for a symmetrical Connection gate open. This creates a broadband Power divider and a transition from an unbalanced on two symmetrical transmission lines. This Balun has a wide bandwidth and is very low loss. There is also a high level of decoupling between the two symmetrical connection gates.
  • the entire coupling length corresponds of the three lines in about half the middle Operating wavelength of the balun.
  • the balun shown in the drawing exists of three inductively coupled units running side by side planar lines 1, 2 and 3, which are therefore in one curved shape are guided to the extent of the To keep the balun as low as possible.
  • the whole Coupling length of the three lines 1, 2 and 3, which together on are arranged on a substrate side corresponds approximately to that half the average operating wavelength of the balun.
  • One end 4 of the middle line 3 of the three lines 1, 2, 3 forms the asymmetrical connection gate TU.
  • the next to this End 4 of the middle line 3 lying ends of the two outer lines 1 and 2 are at ground potential.
  • the Connection of these line ends with one on the ground lines arranged opposite the substrate side is in a known manner by means of vias 5 and 6th realized in the substrate.
  • the two other ends of the outer lines 1 and 2 are also placed on ground potential.
  • the ends are running both outer lines 1 and 2 at one contact to Establish ground surface on the back of the substrate Via 7 together.
  • the middle line 3 ends here with an idle.
  • the two outer cables are at half the coupling length 1 and 2 interrupted.
  • the one through this interruption emerging line ends 8 and 9 of the first outer Line 1 form the first symmetrical connection gate TS1, and caused by the interruption of the second outer line 2 resulting line ends 10 and 11 form the second symmetrical connection gate TS2.
  • the balun described above represents one very broadband 3 dB power divider, both of which Connection gates TS1 and TS2 a high mutual isolation have.
  • the on the symmetrical connection gates TS1 and TS2 decoupled signals have almost the same amplitude and phase.

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  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Waveguides (AREA)

Abstract

The device has adjacent coupled lines with an asymmetrical connection gate and two symmetrical connection gates. It has three adjacent lines. One end of the center line forms the asymmetrical gate. The adjacent ends of the outer lines are at earth potential. Both other ends of the outer lines are at earth potential and the center line is free at that point. Each of the two outer lines is interrupted centrally with two symmetrical gate connections. The device consists of several adjacent coupled planar lines (1-3) with an asymmetrical connection gate (TU) and two symmetrical connection gates (TS1,TS2) . It has three adjacent lines, whereby one end of the center line forms the asymmetrical connection gate and the adjacent ends of the outer lines are at earth potential. Both other ends of the outer lines are likewise at earth potential and the center line is fee at that point. Each of the two outer lines is interrupted at the half way point and at this point has two connections for a symmetrical connection gate.

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft ein Symmetrierglied, bestehend aus nebeneinander verlaufenden, gekoppelten planaren Leitungen mit einem unsymmetrischen Anschlußtor und zwei symmetrischen Anschlußtoren.The present invention relates to a balun, consisting of side by side, coupled planar lines with an asymmetrical connection gate and two symmetrical connection gates.

Symmetrierglieder stellen in bekannter Weise Übergänge zwischen symmetrischen und unsymmetrischen Übertragungsleitungen dar. Von einer symmetrischen Leitung spricht man, wenn ein darüber übertragendes Signal nicht die Masse als Bezugspotential hat. Dagegen ist eine unsymmetrische Übertragungsleitung einseitig mit Masse verbunden, so daß ein darüber übertragenes Signal die Masse als Bezugspotential hat. Symmetrierglieder dieser Art werden z.B. an den Ein- und Ausgängen von Doppelgegentaktmischern oder Modulatoren etc. eingesetzt.Symmetry elements make transitions in a known manner between symmetrical and asymmetrical Transmission lines. From a symmetrical line one speaks when a signal transmitted via it does not Has ground as a reference potential. Against is one unbalanced transmission line on one side with ground connected so that a signal transmitted over it is ground as a reference potential. Symmetry links of this type e.g. at the inputs and outputs of double push-pull mixers or modulators etc. used.

Ein eingangs dargelegtes, aus vier miteinander gekoppelten planaren Leitungen bestehendes Symmetrierglied ist aus der DE 197 29 761 A1 bekannt. Dieses Symmetrierglied besteht aus zwei 3db-Kopplern, von denen jeder mit zwei über eine Länge von λ/4 gekoppelten planaren Leitungen besteht. Jeder der beiden Koppler ist in Form eines zweipoligen Bandpassfilters ausgebildet, wobei einer in einer offenen Schaltungskonfiguration und der andere in einer kurzgeschlossenen Schaltungskonfiguration ausgestaltet ist. Die beiden Viertelwellenlängen-Koppler sind so miteinander verbunden, daß ein 3-toriges Symmetrierglied entsteht, das einen Anschluß für unsymmetrische Signale und zwei Anschlüsse für symmetrische Signale aufweist. Bei dem Leitungskoppler in offener Schaltungskonfiguration sind die einander gegenüberliegenden Enden der beiden Leitungen leerlaufend. Ein anderes Ende der beiden Leitungen dient als symmetrischer Anschluß. Das gegenüberliegende Ende der anderen Leitung ist mit einem Ende des in kurzgeschlossener Schaltungskonfiguration ausgeführten Leitungskopplers verbunden. Von diesem Leitungskoppler sind zwei einander gegenüberliegende Enden der beiden Leitungen mit Masse kontaktiert, und ein anderes Ende einer Leitung bildet einen weiteren Anschluß für symmetrische Signale. Die beiden miteinander verbundenen Leitungsenden der beiden Leitungskoppler bilden das Anschlußtor für unsymmetrische Signale. Um eine enge 3 dB-Kopplung zwischen den Leitungen zu erzielen, ist hier das Symmetrierglied in Mehrlagentechnik aufgebaut. Der Herstellungsaufwand ist deshalb groß, was ungünstig für eine Massenproduktion ist.One set out at the outset, made up of four coupled together planar lines existing balun is from the DE 197 29 761 A1 known. This balun consists of two 3db couplers, each with two over a length of λ / 4 coupled planar lines. Everyone who Both couplers are in the form of a bipolar bandpass filter trained, one in an open Circuit configuration and the other in one short-circuit configuration is configured. The two quarter-wave couplers are thus together connected that a 3-port symmetry arises, the one connection for unbalanced signals and two Has connections for balanced signals. In which Line couplers in an open circuit configuration are the opposite ends of the two lines idling. Another end of the two lines serves as symmetrical connection. The opposite end of the other line is short-circuited with one end of the Circuit configuration executed line coupler connected. Two of this line coupler are each other opposite ends of the two leads with ground contacted, and another end of a line forms one another connection for balanced signals. The two interconnected ends of the two Line couplers form the connection gate for asymmetrical Signals. A close 3 dB coupling between the lines to achieve, the balun in Multi-layer technology built up. The manufacturing cost is therefore large, which is unfavorable for mass production.

Aufgabe und Lösung der ErfindungObject and solution of the invention

Der Erfindung liegt die Aufgabe zugrunde, ein platzsparendes und möglichst einfach herstellbares Symmertrierglied anzugeben.The invention has for its object a space-saving and as easy to manufacture as possible specify.

Ein solches Symmetrierglied ist gemäß den Merkmalen des Anspruchs 1 folgendermaßen aufgebaut. Es sind drei nebeneinander verlaufende, gekoppelte planare Leitungen vorhanden. Ein Ende der mittleren der drei Leitungen bildet das unsymmetrische Anschlußtor, wobei die daneben liegenden Enden der beiden äußeren Leitungen auf Massepotential liegen. Die beiden anderen Enden der äußeren Leitungen liegen ebenfalls auf Massepotential, und die mittlere Leitung endet dort mit einem Leerlauf. Jede der beiden äußeren Leitungen ist auf der halben Länge unterbrochen und weist an dieser Stelle zwei Anschlüsse für ein symmetrisches Anschlußtor auf. Auf diese Weise entsteht ein breitbandiger Leistungsteiler und ein Übergang von einer unsymmetrischen auf zwei symmetrische Übertragungsleitungen. Dieses Symmetrierglied hat eine hohe Bandbreite und ist sehr verlustarm. Es besteht außerdem eine hohe Entkopplung zwischen den beiden symmetrischen Anschlußtoren.Such a balun is according to the features of Claim 1 constructed as follows. There are three side-by-side, coupled planar lines available. One end of the middle of the three lines forms the asymmetrical connection gate, the ones lying next to it Ends of the two outer lines at ground potential lie. The other two ends of the outer leads are also at ground potential, and the middle one Line ends there with an idle. Each of the two outer lines is interrupted at half the length and at this point has two connections for a symmetrical Connection gate open. This creates a broadband Power divider and a transition from an unbalanced on two symmetrical transmission lines. This Balun has a wide bandwidth and is very low loss. There is also a high level of decoupling between the two symmetrical connection gates.

Gemäß einem Unteranspruch entspricht die gesamte Koppellänge der drei Leitungen in etwa der halben mittleren Betriebswellenlänge des Symmetriergliedes.According to a subclaim, the entire coupling length corresponds of the three lines in about half the middle Operating wavelength of the balun.

Beschreibung eines AusführungsbeispielsDescription of an embodiment

Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels wird nachfolgend die Erfindung näher erläutert.Using one shown in the drawing The invention is described in more detail below explained.

Das in der Zeichnung dargestellte Symmetrierglied besteht aus drei nebeneinander verlaufenden induktiv gekoppelten planaren Leitungen 1, 2 und 3, die deshalb in einer geschwungenen Form geführt sind, um die Ausdehnung des Symmetriergliedes möglichst gering zu halten. Die gesamte Koppellänge der drei Leitungen 1, 2 und 3, die gemeinsam auf einer Substratseite angeordnet sind, entspricht in etwa der halben mittleren Betriebswellenlänge des Symmetriergliedes. The balun shown in the drawing exists of three inductively coupled units running side by side planar lines 1, 2 and 3, which are therefore in one curved shape are guided to the extent of the To keep the balun as low as possible. The whole Coupling length of the three lines 1, 2 and 3, which together on are arranged on a substrate side corresponds approximately to that half the average operating wavelength of the balun.

Ein Ende 4 der mittleren Leitung 3 der drei Leitungen 1, 2, 3 bildet das unsymmetrische Anschlußtor TU. Die neben diesem Ende 4 der mittleren Leitung 3 liegenden Enden der beiden äußeren Leitungen 1 und 2 liegen auf Massepotential. Die Verbindung dieser Leitungsenden mit einer auf der gegenüberliegenden Substratseite angeordneten Masseleitungen wird in bekannter Weise mittels Durchkontaktierungen 5 und 6 im Substrat realisiert. Bei dem dargestellten Ausführungsbeispiel ist jedes Ende der beiden äußeren Leitungen 1 und 2 mit einer Durchkontaktierung 5, 6 versehen. Es kann aber auch ein Leitungsende mit dem anderen über eine die mittlere Leitung 3 überbrückende Luftbrücke verbunden werden, so dass dann eine der beiden Durchkontaktierungen 5 bzw. 6 eingespart werden kann. Die beiden anderen Enden der äußeren Leitungen 1 und 2 sind ebenfalls auf Massepotential gelegt. Dazu laufen die Enden beider äußeren Leitungen 1 und 2 an einer den Kontakt zur Massefläche auf der Substratrückseite herstellenden Durchkontaktierung 7 zusammen. Die mittlere Leitung 3 endet hier mit einem Leerlauf.One end 4 of the middle line 3 of the three lines 1, 2, 3 forms the asymmetrical connection gate TU. The next to this End 4 of the middle line 3 lying ends of the two outer lines 1 and 2 are at ground potential. The Connection of these line ends with one on the ground lines arranged opposite the substrate side is in a known manner by means of vias 5 and 6th realized in the substrate. In the illustrated Embodiment is each end of the two outer Lines 1 and 2 with a via 5, 6 Mistake. But it can also end one line with the other via an air bridge bridging the middle line 3 be connected so that then one of the two Vias 5 and 6 can be saved. The two other ends of the outer lines 1 and 2 are also placed on ground potential. The ends are running both outer lines 1 and 2 at one contact to Establish ground surface on the back of the substrate Via 7 together. The middle line 3 ends here with an idle.

Auf der halben Koppellänge sind die beiden äußeren Leitungen 1 und 2 unterbrochen. Die durch diese Unterbrechung entstehenden Leitungsenden 8 und 9 der ersten äußeren Leitung 1 bilden das erste symmetrische Anschlußtor TS1, und die durch die Unterbrechung der zweiten äußeren Leitung 2 entstehenden Leitungsenden 10 und 11 bilden das zweite symmetrische Anschlußtor TS2.The two outer cables are at half the coupling length 1 and 2 interrupted. The one through this interruption emerging line ends 8 and 9 of the first outer Line 1 form the first symmetrical connection gate TS1, and caused by the interruption of the second outer line 2 resulting line ends 10 and 11 form the second symmetrical connection gate TS2.

Das vorangehend beschriebene Symmetrierglied stellt einen sehr breitbandigen 3-dB-Leistungsteiler dar, dessen beide Anschlußtore TS1 und TS2 eine hohe gegenseitige Isolation besitzen. Die an den symmetrischen Anschlußtoren TS1 und TS2 ausgekoppelten Signale besitzen nahezu die gleiche Amplitude und Phase.The balun described above represents one very broadband 3 dB power divider, both of which Connection gates TS1 and TS2 a high mutual isolation have. The on the symmetrical connection gates TS1 and TS2 decoupled signals have almost the same amplitude and phase.

Claims (2)

Symmetrierglied, bestehend aus nebeneinander verlaufenden, gekoppelten planaren Leitungen (1, 2, 3) mit einem unsymmetrischen Anschlußtor (TU) und zwei symmetrischen Anschlußtoren (TS1 und TS2), dadurch gekennzeichnet, dass drei nebeneinander verlaufende Leitungen (1, 2, 3) vorhanden sind, dass ein Ende (4) der mittleren (3) der drei Leitungen (1, 2, 3) das unsymmetrische Anschlußtor (TU) bildet, wobei die daneben liegenden Enden der beiden äußeren Leitungen auf Massepotential (5, 6) liegen, dass die beiden anderen Enden der äußeren Leitungen (1, 2) ebenfalls auf Massepotential (7) liegen und die mittlere Leitung (3) dort mit einem Leerlauf endet, und dass jede der beiden äußeren Leitungen (1, 2) auf der halben Länge unterbrochen ist und an dieser Stelle zwei Anschlüsse (8, 9, 10, 11) für ein symmetrisches Anschlußtor (TS1, TS2) aufweist. Balancing element, consisting of coupled planar lines (1, 2, 3) running alongside one another with an asymmetrical connection gate (TU) and two symmetrical connection gates (TS1 and TS2), characterized in that that there are three adjacent lines (1, 2, 3), that one end (4) of the middle (3) of the three lines (1, 2, 3) forms the asymmetrical connection gate (TU), the adjacent ends of the two outer lines being at ground potential (5, 6), that the other two ends of the outer lines (1, 2) are also at ground potential (7) and the middle line (3) ends there with an open circuit, and that each of the two outer lines (1, 2) is interrupted at half the length and has two connections (8, 9, 10, 11) for a symmetrical connection gate (TS1, TS2) at this point. Symmetrierglied nach Anspruch 1, dadurch gekennzeichnet, dass die Koppellänge der drei Leitungen (1, 2, 3) in etwa der halben mittleren Betriebswellenlänge des Symmetriergliedes entspricht.Balancing element according to claim 1, characterized in that the coupling length of the three lines (1, 2, 3) corresponds approximately to half the average operating wavelength of the balancing element.
EP01301686A 2000-02-24 2001-02-23 Balancing network Expired - Lifetime EP1132995B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10008551A DE10008551A1 (en) 2000-02-24 2000-02-24 Symmetry element has asymmetrical gate formed by end of central conductor, symmetrical connection gates formed at half way interruption points of outer conductors
DE10008551 2000-02-24

Publications (2)

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EP1132995A1 true EP1132995A1 (en) 2001-09-12
EP1132995B1 EP1132995B1 (en) 2006-09-06

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AT (1) ATE339017T1 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1158598B1 (en) * 2000-05-26 2004-11-17 Marconi Communications GmbH Device for transformation of transmission line structures and mixer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428838A (en) * 1993-07-13 1995-06-27 Trw Inc. Diode mixer implemented in a planar monolithic IC

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428838A (en) * 1993-07-13 1995-06-27 Trw Inc. Diode mixer implemented in a planar monolithic IC

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SCHELLENBERG J ET AL: "LOW-LOSS, PLANAR MONOLITHIC BALUNS FOR K/KA-BAND APPLICATIONS", ANAHEIM, CA, JUNE 13 - 19, 1999,NEW YORK, NY: IEEE,US, 13 June 1999 (1999-06-13), pages 1733 - 1736, XP000890692, ISBN: 0-7803-5136-3 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1158598B1 (en) * 2000-05-26 2004-11-17 Marconi Communications GmbH Device for transformation of transmission line structures and mixer

Also Published As

Publication number Publication date
DE50110912D1 (en) 2006-10-19
ATE339017T1 (en) 2006-09-15
EP1132995B1 (en) 2006-09-06
DE10008551A1 (en) 2001-08-30

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