EP1218962B1 - Symmetrierglied - Google Patents

Symmetrierglied Download PDF

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Publication number
EP1218962B1
EP1218962B1 EP00960914A EP00960914A EP1218962B1 EP 1218962 B1 EP1218962 B1 EP 1218962B1 EP 00960914 A EP00960914 A EP 00960914A EP 00960914 A EP00960914 A EP 00960914A EP 1218962 B1 EP1218962 B1 EP 1218962B1
Authority
EP
European Patent Office
Prior art keywords
line
balun
gate
lines
conductors
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
EP00960914A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1218962A1 (de
Inventor
Stefan Kern
Gregor Gerhard
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.)
Telent GmbH
Original Assignee
Marconi Communications 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 Marconi Communications GmbH filed Critical Marconi Communications GmbH
Publication of EP1218962A1 publication Critical patent/EP1218962A1/de
Application granted granted Critical
Publication of EP1218962B1 publication Critical patent/EP1218962B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 interconnected planar cables, one end of a first, between a second and a third line running line as unbalanced signal input is used and the other end this first line is contacted with ground and respectively one end of the other two leads is a balanced one Signal input forms.
  • Symmecrierglieder put in a known manner transitions between symmetric and unbalanced Transmission lines ago. From a symmetrical line one speaks, if the signal transmitted over it as Reference potential does not have the mass. On the other hand is one unbalanced transmission line unilaterally grounded contacted, so that a transmitted signal over the Has ground as a reference potential. Baluns of this type are used e.g. at the inputs and outputs of Double balanced mixers or amplifiers or modulators etc. used. One of three coupled planar wires existing balun is known e.g. from J.
  • From EP 0 844 684 A1 is a balun with three planar lines known in which one end of a first, between a second and a third Lead running line as unbalanced gate serves and the other end of this first line with Mass is contacted. Two adjacent ends of the second and third line form symmetrical gate, and from the other two ends the second and third line is one with ground and the other connected to the unbalanced gate.
  • the invention is based on the object Specify balun of the aforementioned type at with the simplest possible means a DC decoupling is realized.
  • the stated object is achieved with the features of claim 1 solved.
  • the DC decoupling is realized by that of the second and third line not serving as gates Ends are capacitively coupled together.
  • the Capacitive coupling of the line ends in a very simple way and be realized either by the fact that the ends the second and third line with line sections are connected, which over a predefinable length run side by side or in that the ends of the second and third line over one or more Capacitors are connected together. It is appropriate with the third line to connect a capacity in series. This capacity improves the symmetry between the symmetrical gates. It serves to balance the Phase difference to 180 °.
  • the balun shown in Figure 1 consists of three adjacent and coupled with each other planar lines 1, 2 and 3.
  • the coupling length of these three Lines correspond to about a quarter of the middle Operating wavelength of the balun.
  • the first line 1, between the other two lines 2 and 3 runs, is contacted at one end to ground. Is to in the substrate on which the leads are applied, a via 4 to the ground plane on the Provided underside of the substrate.
  • the opposite End of this first line 1 forms an unbalanced gate 5.
  • the this unbalanced gate 5 adjacent end of second line 2 is a first gate for symmetrical Signals and the second gate 7 for balanced signals is located at the end of the third line 3, which is the Ground terminal of the first line 1 is adjacent.
  • the gates 6 and 7 opposite ends of the second conduit 2 and the third line 3 are each with a line section 9, 10 connected.
  • the coupling length of the two line sections 9 and 10 is chosen so that a desired capacitive coupling between the ends of the two lines 2 and 3 is formed. These capacitive coupling of the two lines 2 and 3 causes that the balun is DC-decoupled.
  • FIG. 2 shows a balun, which is shown in FIG Principle has the same structure as the balun Figure 1 and therefore also the same reference numerals having.
  • the shown in Figures 1 and 2 Distinguish embodiments of a balun itself by the kind of the capacitive coupling between the Ends of the two lines 2 and 3. While according to the Embodiment in Figure 1, the capacitive coupling by a line coupling between the line sections 9 and 10 takes place, are at the balun of FIG 2, the two line sections 9 and 10 over two as Concentrated components performed capacitors C2 and C3 linked together.

Landscapes

  • Coils Or Transformers For Communication (AREA)
  • Microwave Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Dc Digital Transmission (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Liquid Crystal Substances (AREA)
  • Steroid Compounds (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Communication Cables (AREA)
  • Electric Cable Installation (AREA)
  • Near-Field Transmission Systems (AREA)
  • Amplifiers (AREA)
  • Paper (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Carbon And Carbon Compounds (AREA)
EP00960914A 1999-09-14 2000-09-12 Symmetrierglied Expired - Lifetime EP1218962B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19943954 1999-09-14
DE19943954 1999-09-14
PCT/IB2000/001371 WO2001020709A1 (de) 1999-09-14 2000-09-12 Symmetrierglied

Publications (2)

Publication Number Publication Date
EP1218962A1 EP1218962A1 (de) 2002-07-03
EP1218962B1 true EP1218962B1 (de) 2005-11-09

Family

ID=7921941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00960914A Expired - Lifetime EP1218962B1 (de) 1999-09-14 2000-09-12 Symmetrierglied

Country Status (8)

Country Link
US (1) US6809610B1 (zh)
EP (1) EP1218962B1 (zh)
CN (1) CN1206768C (zh)
AT (1) ATE309623T1 (zh)
AU (1) AU7306800A (zh)
DE (1) DE50011583D1 (zh)
NO (1) NO20021285L (zh)
WO (1) WO2001020709A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201228090A (en) * 2010-12-31 2012-07-01 Ind Tech Res Inst Input apparatus on chip for differential signals and balun thereof
CN107356265B (zh) * 2017-07-10 2020-06-16 哈尔滨工业大学 一种基于陀螺飞轮力矩线圈电流的偶不平衡量辨识方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59148405A (ja) 1983-02-14 1984-08-25 Matsushita Electric Ind Co Ltd 平衡不平衡変換器
JPH10163715A (ja) * 1996-11-26 1998-06-19 Murata Mfg Co Ltd 不平衡−平衡変換器
FI103614B (fi) * 1997-03-20 1999-07-30 Nokia Mobile Phones Ltd Vaiheistus- ja balansointielin
US5886589A (en) * 1997-05-30 1999-03-23 Analog Devices, Incorporated Balanced to unbalanced transmission line transformers
SE513470C2 (sv) * 1999-07-08 2000-09-18 Ericsson Telefon Ab L M Balunkrets

Also Published As

Publication number Publication date
AU7306800A (en) 2001-04-17
CN1206768C (zh) 2005-06-15
NO20021285L (no) 2002-05-14
DE50011583D1 (de) 2005-12-15
NO20021285D0 (no) 2002-03-14
CN1390369A (zh) 2003-01-08
WO2001020709A1 (de) 2001-03-22
EP1218962A1 (de) 2002-07-03
US6809610B1 (en) 2004-10-26
ATE309623T1 (de) 2005-11-15

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