EP0683539A1 - Structure de ligne micro-onde - Google Patents

Structure de ligne micro-onde Download PDF

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Publication number
EP0683539A1
EP0683539A1 EP95105692A EP95105692A EP0683539A1 EP 0683539 A1 EP0683539 A1 EP 0683539A1 EP 95105692 A EP95105692 A EP 95105692A EP 95105692 A EP95105692 A EP 95105692A EP 0683539 A1 EP0683539 A1 EP 0683539A1
Authority
EP
European Patent Office
Prior art keywords
line
conductor
coplanar
conductor track
coplanar line
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.)
Ceased
Application number
EP95105692A
Other languages
German (de)
English (en)
Inventor
Werner Dr. Dipl.-Ing. Bischof
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
ANT Nachrichtentechnik 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, ANT Nachrichtentechnik GmbH filed Critical Robert Bosch GmbH
Publication of EP0683539A1 publication Critical patent/EP0683539A1/fr
Ceased 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
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/026—Coplanar striplines [CPS]
    • 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 microwave line structure according to the preamble of claim 1.
  • planar lines are used for circuits in microwave technology, e.g. in the form of microstrip lines or coplanar lines.
  • microstrip lines consist of two planar lines applied on opposite sides of a substrate.
  • Coplanar lines have two or three lines running side by side on a substrate side.
  • a microwave line structure as set out in the introduction, can be found in German Patent 40 32 260.
  • a microstrip line is arranged between the two conductor tracks of a coplanar line.
  • balun In high-frequency technology, the transition from an asymmetrical line, for example a coaxial line, to a symmetrical line, for example a two-wire line, is accomplished by a balun, which has also entered the specialist literature under the name Balun.
  • the book Zinke, Brunswick shows examples of such symmetry elements: "Textbook of High Frequency Technology" Volume 1, page 104.
  • Integrated circuits so-called monolithically integrated microwave circuits MMIC, are increasingly being used in microwave technology.
  • the present invention was based on the object of specifying a microwave line structure of the type mentioned at the outset which makes it possible to produce a balancing circuit for monolithically integrated circuits in a planar form and to use it in a wide frequency range.
  • the microwave line structure according to the invention allows a symmetry transition of an asymmetrical line type, e.g. Microstrip line, coplanar line, to a symmetrical line type, e.g. Two-wire line, or on two asymmetrical lines with push-pull excitation or in reverse mode of operation, namely in monolithically integrable planar circuit technology.
  • a relatively large operating frequency bandwidth is made possible, with the solution of claim 2, on the other hand, a still significantly expanded bandwidth, for example from 5 to 75 GHz.
  • FIG. 3a shows an equivalent circuit diagram for the arrangement according to FIG. 3.
  • FIG. 1 shows a microstrip line which has a first conductor track 1 which is metallized on one side of a substrate.
  • Semiconductor materials such as gallium arsenide, indium phosphide or silicon, but also ceramic or quartz glass can preferably be used as substrates.
  • a second line 3 belonging to the microstrip line is led at a distance above the line 1 resting on the substrate.
  • the distance between the two lines 1 and 3 is held by posts 4 which protrude from the line 1 metallized on the substrate 2 and serve as supports for the line 3.
  • the posts 4 carrying the line 3 are lined up at suitable intervals, so that the space between the two lines 1 and 3 is mainly filled with air.
  • a 50-ohm microstrip line can be implemented, in which the line 3 guided over the posts 4 does not have to be dimensioned so narrow that sufficient couplings can still be achieved between this line and further lines metallized on the substrate.
  • the posts 4 consist of either a dielectric or a conductive material. In the latter case, it is necessary to isolate them from the metallized conductor track 1 on the substrate 2. As can be seen from the exemplary embodiment in FIG. 1, cutouts 5 are provided in the conductor track 1 for this case. Furthermore, a coplanar line extending to both sides of the microstrip line with the two conductor tracks 6 and 7, which are likewise metallized on the substrate 2, can be removed.
  • This spatially close arrangement creates a coupling between two different line types, namely the microstrip line and the coplanar line.
  • This coupled line arrangement is the basic component of the present balancing circuit.
  • the waveguide 1, 3 carries an electromagnetic wave, which is introduced at its asymmetrical input gate A (Fig. 2).
  • the two conductor tracks 6 and 7 of the coplanar line are connected to one another and to the first conductor of the microstrip line.
  • the length of the coplanar line is approximately 1/4 of the wavelength of the operating frequency. Since it is open at the other end, this is a short-circuited coplanar stub which forms an open circuit at ⁇ / 4 resonance at the other end, so that reverse currents on the first conductor 1 are prevented.
  • the first conductor 1 at gate B is thus free of mass. This means that a load can be connected to this symmetrical gate B without a mass, in particular also an earth-symmetrical two-wire line.
  • the reactance of the coplanar stub deteriorates the behavior of the arrangement outside the resonance frequency.
  • the reactance profile can be compensated for over a large frequency range by a further coplanar stub 9 according to FIG.
  • the conductor 1 is interrupted approximately in the middle and a symmetrical line gate B is led out at both ends. If the two earth-symmetrical conductors at gate B are connected directly with two unbalanced lines, two outputs with push-pull signals are obtained. The phase difference remains almost exactly 180 ° over a very, very wide frequency range.
  • the arrangements according to the invention can of course also be used reciprocally and can thus be used as a power divider or as a power adder.
  • the geometry of the waveguide 1, 3 can be dimensioned differently according to the requirement, so that an impedance transformation between the gates A and B also takes place.

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  • Waveguides (AREA)
EP95105692A 1994-05-21 1995-04-15 Structure de ligne micro-onde Ceased EP0683539A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4417976 1994-05-21
DE4417976A DE4417976C1 (de) 1994-05-21 1994-05-21 Mikrowellenleitungsstruktur

Publications (1)

Publication Number Publication Date
EP0683539A1 true EP0683539A1 (fr) 1995-11-22

Family

ID=6518766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105692A Ceased EP0683539A1 (fr) 1994-05-21 1995-04-15 Structure de ligne micro-onde

Country Status (3)

Country Link
US (1) US5594393A (fr)
EP (1) EP0683539A1 (fr)
DE (1) DE4417976C1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5745017A (en) * 1995-01-03 1998-04-28 Rf Prime Corporation Thick film construct for quadrature translation of RF signals
US5907266A (en) * 1996-11-26 1999-05-25 Raytheon Company Alignment tolerant overlay directional coupler
US5805037A (en) * 1996-12-23 1998-09-08 Motorola Corporation Distributed transmission line structure
USH1959H1 (en) 1998-09-03 2001-05-01 Anthony Kikel Single balanced to dual unbalanced transformer
US6211541B1 (en) 1999-02-01 2001-04-03 Lucent Technologies, Inc. Article for de-embedding parasitics in integrated circuits
US6194750B1 (en) 1999-02-01 2001-02-27 Lucent Technologies, Inc. Integrated circuit comprising means for high frequency signal transmission
ATE448583T1 (de) * 2003-06-13 2009-11-15 Ericsson Telefon Ab L M Übertragungsleitung
US20050083147A1 (en) * 2003-10-20 2005-04-21 Barr Andrew H. Circuit board and method in which the impedance of a transmission-path is selected by varying at least one opening in a proximate conductive plane
US20050190019A1 (en) * 2004-02-27 2005-09-01 Carsten Metz Low-loss transmission line structure
KR100715861B1 (ko) * 2006-02-17 2007-05-11 삼성전자주식회사 발룬
US8164397B2 (en) * 2009-08-17 2012-04-24 International Business Machines Corporation Method, structure, and design structure for an impedance-optimized microstrip transmission line for multi-band and ultra-wide band applications
KR101311791B1 (ko) * 2011-12-26 2013-09-25 고려대학교 산학협력단 결함 접지 구조를 이용한 발룬 회로
US9692387B2 (en) * 2015-07-24 2017-06-27 Nxp Usa, Inc. Balun transformer
US10790567B2 (en) * 2019-02-18 2020-09-29 Qorvo Us, Inc. Enhanced air core transmission lines and transformers
WO2024156352A1 (fr) * 2023-01-26 2024-08-02 Telefonaktiebolaget Lm Ericsson (Publ) Ruban conducteur autoportant pour ligne de transmission

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125810A (en) * 1977-04-08 1978-11-14 Vari-L Company, Inc. Broadband high frequency baluns and mixer
DE4032260C1 (en) * 1990-10-11 1992-04-23 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De Microwave strip conductor - has conductive track formed on surface of substrate, e.g. gallium arsenide

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025232A (en) * 1989-10-31 1991-06-18 Texas Instruments Incorporated Monolithic multilayer planar transmission line
US5369795A (en) * 1991-05-29 1994-11-29 Hewlett-Packard Company High frequency transformer and mixer using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125810A (en) * 1977-04-08 1978-11-14 Vari-L Company, Inc. Broadband high frequency baluns and mixer
DE4032260C1 (en) * 1990-10-11 1992-04-23 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De Microwave strip conductor - has conductive track formed on surface of substrate, e.g. gallium arsenide

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
M. HOUDART ET AL.: "Various excitation of coplanar waveguide", 1979 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM, 30 April 1979 (1979-04-30) - 2 May 1979 (1979-05-02), ORLANDO,US, pages 116 - 118, XP031666472 *
ZINKE ET AL.: "Lehrbuch der Hochfrequenztechnik,Band 1", SPRINGER-VERLAG, BERLIN *

Also Published As

Publication number Publication date
DE4417976C1 (de) 1995-05-18
US5594393A (en) 1997-01-14

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