EP0498036A2 - High-frequency broadband transducer - Google Patents

High-frequency broadband transducer Download PDF

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Publication number
EP0498036A2
EP0498036A2 EP91117190A EP91117190A EP0498036A2 EP 0498036 A2 EP0498036 A2 EP 0498036A2 EP 91117190 A EP91117190 A EP 91117190A EP 91117190 A EP91117190 A EP 91117190A EP 0498036 A2 EP0498036 A2 EP 0498036A2
Authority
EP
European Patent Office
Prior art keywords
frequency
frequency broadband
radio
winding
broadband transmitter
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.)
Withdrawn
Application number
EP91117190A
Other languages
German (de)
French (fr)
Other versions
EP0498036A3 (en
Inventor
Peter Wandel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0498036A2 publication Critical patent/EP0498036A2/en
Publication of EP0498036A3 publication Critical patent/EP0498036A3/en
Withdrawn legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00Fixed transformers or mutual inductances of the signal type
    • H01F19/04Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range

Definitions

  • the invention is based on a high-frequency broadband transmitter according to the preamble of claim 1.
  • Such a high-frequency broadband transmitter which has two individual transmitters and which is only suitable for high-frequency transmission up to about 600 MHz.
  • the invention has for its object to develop a high-frequency broadband transmitter according to the preamble of claim 1 such that it is suitable for the signal transmission of frequencies above 600 MHz with the simplest possible, compact structure.
  • a high-frequency broadband transmitter with these features transmits signals within a frequency range of, for example, 47 to 860 MHz.
  • the reason for this is the twisting of the wires of the two windings, which compensates for the series leakage inductance that otherwise occurs, which has a strong bandwidth-limiting effect.
  • the high broadness is also retained if the turns ratios of the first and second windings are not the same, but different.
  • a further advantage is achieved if a capacitor is connected in parallel to the input or the output of the high-frequency broadband transmitter. This means that any parasitic inductive components of the transformer that may still be present can be compensated for, so that its broadband capability is increased.
  • E denotes the input and O the output of a high-frequency broadband transmitter Ü with two windings W1, W2, which are arranged on a ferrite core K.
  • the ferrite core is a double hole core DK with two holes L1 and L2.
  • the twisted windings W1 and W2 are wound through the holes.
  • the first winding W1 has two turns and the second winding W2 has three turns.
  • the windings W1, W2 preferably consist of enamelled copper wire.
  • a transformer U which has the same basic structure as the transformer according to FIG. 2, a first capacitor C1 is connected on the primary side and a second capacitor C2 is connected in parallel on the secondary side.
  • the capacitors C1, C2 compensate for parasitic inductances of the transformer U. In this case, the windings W1 and W2 have a turn ratio of 1: 3.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

2.1 Known radio-frequency broadband transformers having two windings arranged on a ferrite core can transform radio-frequency signals only up to a frequency of about 600 MHz. …<??>2.2 In order that radio-frequency signals up to a frequency of about 860 MHz can also be transformed, it is proposed according to the invention that the first winding (W1) be wound on the ferrite core (K) twisted with the second winding (W2). This allows a radio-frequency broadband transformer to be implemented which is suitable for transforming radio-frequency signals in a frequency band of, for example, 47 to 860 MHz. …<??>3. The drawing shows a radio-frequency broadband transformer in section. …<IMAGE>…

Description

Die Erfindung geht von einem Hochfrequenz-Breitbandübertrager nach dem Oberbegriff des Anspruchs 1 aus.The invention is based on a high-frequency broadband transmitter according to the preamble of claim 1.

Es ist ein derartiger Hochfrequenz-Breitbandübertrager bekannt, der Zwei Einzelübertrager aufweist und der nur für eine Hochfrequenzübertragung bis zu etwa 600 MHz geeignet ist.Such a high-frequency broadband transmitter is known which has two individual transmitters and which is only suitable for high-frequency transmission up to about 600 MHz.

Es ist weiterhin bekannt, zum Übertragen von hohen Frequenzen bis zu 860 MHz anstelle eines Übertragers einen Vorwiderstand zu verwenden. Die damit verbundene Dämpfung von 4 dB muß dann durch eine um 4 dB höhere Hochfrequenzleistung ausgeglichen werden. Mit der höheren Leistung sind jedoch Probleme bezüglich der Signalqualität verbunden.It is also known to use a series resistor instead of a transmitter for transmitting high frequencies up to 860 MHz. The associated attenuation of 4 dB must then be compensated for by a 4 dB higher radio frequency power. However, the higher performance is associated with signal quality problems.

Der Erfindung liegt die Aufgabe zugrunde, einen Hochfrequenz-Breitbandübertrager nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, daß er bei möglichst einfachem, kompakten Aufbau auch für die Signalübertragung von Frequenzen über 600 MHz geeignet ist.The invention has for its object to develop a high-frequency broadband transmitter according to the preamble of claim 1 such that it is suitable for the signal transmission of frequencies above 600 MHz with the simplest possible, compact structure.

Diese Aufgabe wird bei einem Hochfrequenz-Breitbandübertrager gemäß dem Oberbegriff des Anspruchs 1 durch die im kennzeichnenden Teil dieses Anspruchs aufgeführten Merkmale gelöst. Ein Hochfrequenz-Breitbandübertrager mit diesen Merkmalen überträgt Signale innerhalb eines Frequenzbereiches von zum Beispiel 47 bis 860 MHz. Ursache hierfür ist das Verdrillen der Drähte der beiden Wicklungen, durch die die sonst auftretende Serienstreuinduktivität, die stark bandbreitenbegrenzend wirkt, kompensiert wird. Die hohe Breitbandigkeit bleibt auch erhalten, wenn die Windungsverhältnisse von erster und zweiter Wicklung nicht gleich, sondern verschieden sind.This object is achieved in a high-frequency broadband transmitter according to the preamble of claim 1 by the features listed in the characterizing part of this claim. A high-frequency broadband transmitter with these features transmits signals within a frequency range of, for example, 47 to 860 MHz. The reason for this is the twisting of the wires of the two windings, which compensates for the series leakage inductance that otherwise occurs, which has a strong bandwidth-limiting effect. The high broadness is also retained if the turns ratios of the first and second windings are not the same, but different.

Ein weiterer Vorteil wird erreicht, wenn dem Eingang oder dem Ausgang des Hochfrequenz-Breitbandübertragers ein Kondensator parallelgeschaltet ist. Damit lassen sich nämlich eventuell noch vorhandene parasitäre induktive Komponenten des Übertragers kompensieren, so daß sich dessen Breitbandigkeit erhöht.A further advantage is achieved if a capacitor is connected in parallel to the input or the output of the high-frequency broadband transmitter. This means that any parasitic inductive components of the transformer that may still be present can be compensated for, so that its broadband capability is increased.

Ausführungsbeispiele der Erfindung sind in der Zeichnung an Hand mehrerer Figuren dargestellt und werden im folgenden näher erläutert.
Es zeigen

Fig. 1
ein Prinzipschaltbild eines Hochfrequenz-Breitbandübertragers,
Fig. 2
einen Hochfrequenz-Breitbandübertrager mit verdrillten Wicklungen und Doppellochferritkern im Schnitt und
Fig. 3
ein Schaltbild eines Hochfrequenz-Breitbandübertragers für die Anpassung einer Hochfrequenzleitung an eine Laser-Diode.
Embodiments of the invention are shown in the drawing using several figures and are explained in more detail below.
Show it
Fig. 1
a schematic diagram of a high frequency broadband transmitter,
Fig. 2
a high-frequency broadband transformer with twisted windings and double-hole ferrite core on average and
Fig. 3
a circuit diagram of a high-frequency broadband transmitter for adapting a high-frequency line to a laser diode.

In Fig. 1 bezeichnet E den Eingang und O den Ausgang eines Hochfrequenz-Breitbandübertragers Ü mit zwei Wicklungen W1, W2, die auf einem Ferritkern K angeordnet sind.In Fig. 1, E denotes the input and O the output of a high-frequency broadband transmitter Ü with two windings W1, W2, which are arranged on a ferrite core K.

Nach Fig. 2 ist der Ferritkern ein Doppellochkern DK mit zwei Löchern L1 und L2. Durch die Löcher hindurch sind die miteinander verdrillten Wicklungen W1 und W2 gewickelt. In dem angenommenen Beispiel hat die erste Wicklung W1 zwei Windungen und die zweite Wicklung W2 drei Windungen. Die Wicklungen W1, W2 bestehen vorzugsweise aus Kupferlackdraht.2, the ferrite core is a double hole core DK with two holes L1 and L2. The twisted windings W1 and W2 are wound through the holes. In the assumed example, the first winding W1 has two turns and the second winding W2 has three turns. The windings W1, W2 preferably consist of enamelled copper wire.

Nach dem Schaltbild in Fig. 3 ist mit einem Eingang E eines Hochfrequenz-Breitbandübertragers ÜL eine Hochfrequenzleitung L angeschlossen, die zum Beispiel eine Impedanz Z = 75 Ω aufweist. Einem Übertrager Ü, der den gleichen prinzipiellen Aufbau wie der Übertrager nach Fig. 2 aufweist, ist primärseitig ein erster Kondensator C1 und sekundärseitig ein zweiter Kondensator C2 parallelgeschaltet. An den Ausgang O ist eine Laserdiode LD angeschlossen, die zum Beispiel eine Impedanz Z = 25 Ω aufweist. Die Kondensatoren C1, C2 bewirken eine Kompensation von parasitären Induktivitäten des Übertragers Ü. Die Wicklungen W1 und W2 haben in diesem Fall ein Windungsverhältnis von 1 : 3.According to the circuit diagram in FIG. 3, a high-frequency line L is connected to an input E of a high-frequency broadband transmitter ÜL, which line has, for example, an impedance Z = 75 Ω. A transformer U, which has the same basic structure as the transformer according to FIG. 2, a first capacitor C1 is connected on the primary side and a second capacitor C2 is connected in parallel on the secondary side. A laser diode LD is connected to the output O and has, for example, an impedance Z = 25 Ω. The capacitors C1, C2 compensate for parasitic inductances of the transformer U. In this case, the windings W1 and W2 have a turn ratio of 1: 3.

Claims (6)

Hochfrequenz-Breitbandübertrager mit zwei auf einem Ferritkern angeordneten Wicklungen, von denen eine erste Wicklung zwischen einem Eingang und einem Ausgang des Übertragers und eine zweite Wicklung zwischen dem Ausgang und dem Massepotential liegt, dadurch gekennzeichnet, daß die erste Wicklung (W1) mit der zweiten Wicklung (W2) verdrillt auf den Ferritkern (K) gewickelt ist.High-frequency broadband transformer with two windings arranged on a ferrite core, of which a first winding lies between an input and an output of the transformer and a second winding between the output and the ground potential, characterized in that the first winding (W1) with the second winding (W2) is twisted on the ferrite core (K). Hochfrequenz-Breitbandübertrager nach Anspruch 1, dadurch gekennzeichnet, daß der Ferritkern (K) ein Doppellochkern (DK) ist.High-frequency broadband transmitter according to claim 1, characterized in that the ferrite core (K) is a double-hole core (DK). Hochfrequenz-Breitbandübertrager nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Eingang (E) oder dem Ausgang (O) des Hochfrequenz-Breitbandübertragers (Ü) ein Kondensator (C1, C2) parallelgeschaltet ist.High-frequency broadband transmitter according to Claim 1 or 2, characterized in that a capacitor (C1, C2) is connected in parallel to the input (E) or the output (O) of the high-frequency broadband transmitter (Ü). Hochfrequenz-Breitbandübertrager nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß dem Eingang (E) und dem Ausgang (O) des Hochfrequenz-Breitbandübertragers (Ü) je ein Kondensator (C1, C2) parallelgeschaltet ist.High-frequency broadband transmitter according to claim 1 or 2, characterized in that the input (E) and the output (O) of the high-frequency broadband transmitter (Ü) each have a capacitor (C1, C2) connected in parallel. Hochfrequenz-Breitbandübertrager nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Wicklungen (W1, W2) aus Kupferlackdraht bestehen.High-frequency broadband transmitter according to one of claims 1 to 4, characterized in that the windings (W1, W2) consist of enamelled copper wire. Hochfrequenz-Breitbandübertrager nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Hochfrequenz-Breitbandübertrager (ÜL) zur Anpassung der Impedanz (Z1) einer mit dem Eingang (E) des Übertragers verbundenen Hochfrequenzleitung (L1) und einer anderen Impedanz (Z2) einer mit dem Ausgang (O) des Übertragers verbundenen Laserdiode (LD) vorgesehen ist.High-frequency broadband transmitter according to one of claims 1 to 5, characterized in that the high-frequency broadband transmitter (ÜL) for matching the impedance (Z1) of a high-frequency line (L1) connected to the input (E) of the transmitter and another impedance (Z2) a laser diode (LD) connected to the output (O) of the transmitter is provided.
EP19910117190 1991-02-02 1991-10-09 High-frequency broadband transducer Withdrawn EP0498036A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4103184A DE4103184A1 (en) 1991-02-02 1991-02-02 HIGH-FREQUENCY BROADBAND TRANSMITTER
DE4103184 1991-02-02

Publications (2)

Publication Number Publication Date
EP0498036A2 true EP0498036A2 (en) 1992-08-12
EP0498036A3 EP0498036A3 (en) 1992-12-02

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EP19910117190 Withdrawn EP0498036A3 (en) 1991-02-02 1991-10-09 High-frequency broadband transducer

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US (1) US5216393A (en)
EP (1) EP0498036A3 (en)
JP (1) JPH04335507A (en)
DE (1) DE4103184A1 (en)
FI (1) FI920096A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500867A (en) 1994-09-13 1996-03-19 At&T Corp. Laser package having an impedance matching transformer
US5619172A (en) * 1995-09-14 1997-04-08 Vari-L Company, Inc. High impedance ratio wideband transformer circuit
US5742213A (en) * 1995-09-14 1998-04-21 Vari-L Company, Inc. Unbalanced to balanced high impedance ratio wideband transformer circuit
US7724484B2 (en) * 2006-12-29 2010-05-25 Cobham Defense Electronic Systems Corporation Ultra broadband 10-W CW integrated limiter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1238974B (en) * 1965-04-24 1967-04-20 Telefunken Patent High frequency transmitter
DE3022023A1 (en) * 1980-06-12 1981-12-17 Robert Bosch Gmbh, 7000 Stuttgart Broadband, reflection-free HF directional coupler - has sec. winding tapping producing matching wave impedance

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5459859A (en) * 1977-10-20 1979-05-14 Sanyo Electric Co Ltd Input transformer device of television picture receiver
US4379273A (en) * 1981-06-25 1983-04-05 Mcdonnell Douglas Corporation Pulse transformer laser diode package
US4687947A (en) * 1985-02-08 1987-08-18 Melvin Cobb Electrical power conservation circuit
US5051710A (en) * 1990-06-25 1991-09-24 Motorola, Inc. Variable Zo transmission line transformer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1238974B (en) * 1965-04-24 1967-04-20 Telefunken Patent High frequency transmitter
DE3022023A1 (en) * 1980-06-12 1981-12-17 Robert Bosch Gmbh, 7000 Stuttgart Broadband, reflection-free HF directional coupler - has sec. winding tapping producing matching wave impedance

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ELECTRONICS Bd. 46, Nr. 17, 16. August 1973, BLACKSBURG, VIRGINIA Seiten 113 - 116 KRAUSS ET AL 'Designinig toroidal transformers to optimize wideband performance' *
THE REVIEW OF SCIENTIFIC INSTRUMENTS Bd. 34, Nr. 10, 27. Februar 1963, YORKTOWN HEIGHTS, NEW YORK Seiten 1075 - 1081 TANSAL ET AL 'Wide-band pulse transformers for matching low impedance loads' *

Also Published As

Publication number Publication date
US5216393A (en) 1993-06-01
FI920096A (en) 1992-08-03
JPH04335507A (en) 1992-11-24
EP0498036A3 (en) 1992-12-02
DE4103184A1 (en) 1992-08-06
FI920096A0 (en) 1992-01-09

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