EP0213864A2 - Symétriseurs - Google Patents

Symétriseurs Download PDF

Info

Publication number
EP0213864A2
EP0213864A2 EP86306357A EP86306357A EP0213864A2 EP 0213864 A2 EP0213864 A2 EP 0213864A2 EP 86306357 A EP86306357 A EP 86306357A EP 86306357 A EP86306357 A EP 86306357A EP 0213864 A2 EP0213864 A2 EP 0213864A2
Authority
EP
European Patent Office
Prior art keywords
balun circuit
strip
metallic
strips
output
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Withdrawn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
EP86306357A
Other languages
German (de)
English (en)
Other versions
EP0213864A3 (fr
Inventor
Christopher Hunter Oxley
Anthony James Holden
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.)
Plessey Overseas Ltd
Original Assignee
Plessey Overseas Ltd
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 Plessey Overseas Ltd filed Critical Plessey Overseas Ltd
Publication of EP0213864A2 publication Critical patent/EP0213864A2/fr
Publication of EP0213864A3 publication Critical patent/EP0213864A3/fr
Withdrawn legal-status Critical Current

Links

Images

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 Balun circuits and more particularly but not exclusively to Balun circuits which have a co-planar arrangement.
  • Balun circuits allow coupling of balanced and unbalanced lines in for example telecommunications systems.
  • balun circuits have been constructed using coils or quite complex linear patterns and have thus required relatively large areas to accommodate them, creating problems in compatability with integrated circuits.
  • balun circuit can be included in an integrated circuit having a small area and constructed using known semiconductor fabrication processes.
  • the present invention provides a balun circuit for an input signal of a particular wavelength comprising:- a dielectric substrate, a first metallic strip on the surface of the substrate having an input to receive the input signal and a first output; and, a second metallic strip, also on the surface of the substrate with a second output and with an end pinned to a reference voltage, the first and second metallic strips being substantially parallel to one another with a gap there between whereby the strips mutually induct, the second metallic strip having a length to be equal to a quarter the wavelength of the input signal, the values of the gap and strip widths being predetermined such that the output impedances of the first and second metallic strips respectively are substantally equal.
  • the reference voltage will be OV or earth.
  • the outputs of the first and second metallic strips will be fed to a long-tailed transistor pair to give a balanced signal output from the pair.
  • the substrate material may be a ceramic or a semiconductor.
  • a dielectric substrate 1 has on its surface two metallic strips 3 and 5 parallel to one another and spaced by a gap 7.
  • the first strip 3 has an input part 9 and an output part 11 at either end with a width 13 while the second strip 5 is pinned to earth 15 at one end and has an output part 17 at the other end with a width 19 and length 21.
  • the values of gap 7 and widths 13 and 19 are dictated by the dielectric constant of the substrate and the impedance transformation to be achieved by the balun circuit.
  • the length 21 of the second metallic strip 5 is designed to have substantially a quarter the anti-symmetric mode wavelength of an input signal fed to the input part 9 of the first metallic strip 3.
  • Figure 2 shows a balun circuit of figure 1 with a long-tailed pair of field-effect transistors attached to the strip output ports via their source connections.
  • the source 35 of transistor 31 is connected to strip 3 and the source 37 of transistor 33 connected to strip 5.
  • the gates of the transistors 33 and 31 are connected by strip 39 and the output 41 of the long-tailed pair taken across the drains of the transistors 31 and 33.
  • the output 31 is stable and well balanced.
  • balun circuit can be constructed on semi­conductor material like gallium arsenide or on ceramics material, for which methods of metal deposition are well known.
  • semi­conductor material like gallium arsenide or on ceramics material, for which methods of metal deposition are well known.
  • the use of a semiconductor material presents possibly the best advantages, as this allows the production of monolithic circuits obviating requirement for discrete components.
  • the dimension of the strip gap 7 and widths 13 and 19 are typically in the range of 10 to 1000 microns.

Landscapes

  • Microwave Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
  • Waveguides (AREA)
  • Telephone Function (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Toys (AREA)
EP86306357A 1985-08-31 1986-08-18 Symétriseurs Withdrawn EP0213864A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8521727 1985-08-31
GB858521727A GB8521727D0 (en) 1985-08-31 1985-08-31 Balun circuits

Publications (2)

Publication Number Publication Date
EP0213864A2 true EP0213864A2 (fr) 1987-03-11
EP0213864A3 EP0213864A3 (fr) 1988-09-07

Family

ID=10584574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86306357A Withdrawn EP0213864A3 (fr) 1985-08-31 1986-08-18 Symétriseurs

Country Status (3)

Country Link
EP (1) EP0213864A3 (fr)
JP (1) JPS6271304A (fr)
GB (2) GB8521727D0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142697A (en) * 1989-09-26 1992-08-25 U.S. Philips Corporation Balanced high-frequency mixer having a balun circuit
DE4321411C1 (de) * 1993-06-26 1994-11-10 Ant Nachrichtentech Symmetrierschaltung
US6018277A (en) * 1997-03-20 2000-01-25 Nokia Mobile Phones Limited Series of strip lines for phasing and balancing a signal

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5565881A (en) * 1994-03-11 1996-10-15 Motorola, Inc. Balun apparatus including impedance transformer having transformation length
JP2669405B2 (ja) * 1995-07-27 1997-10-27 日本電気株式会社 バラントランス

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721912A (en) * 1971-04-19 1973-03-20 Sperry Rand Corp Short time electromagnetic wave signal sampling system
US3848198A (en) * 1972-12-14 1974-11-12 Rca Corp Microwave transmission line and devices using multiple coplanar conductors
US3991390A (en) * 1975-07-31 1976-11-09 Motorola, Inc. Series connected stripline balun
EP0146086A2 (fr) * 1983-12-09 1985-06-26 Polska Akademia Nauk Centrum Badan Kosmicznych Transformateur symétrique-asymétrique à micro-ondes pour mélangeurs et modulateurs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798575A (en) * 1972-12-14 1974-03-19 Rca Corp Microwave transmission line and devices using multiple coplanar conductors
US3965445A (en) * 1975-02-03 1976-06-22 Motorola, Inc. Microstrip or stripline coupled-transmission-line impedance transformer
US4275364A (en) * 1979-09-24 1981-06-23 The United States Of America As Represented By The Secretary Of The Navy Resonant element transformer
US4465985A (en) * 1982-03-02 1984-08-14 The United States Of America As Represented By The Secretary Of The Air Force Hardwire missile receiver coupler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721912A (en) * 1971-04-19 1973-03-20 Sperry Rand Corp Short time electromagnetic wave signal sampling system
US3848198A (en) * 1972-12-14 1974-11-12 Rca Corp Microwave transmission line and devices using multiple coplanar conductors
US3991390A (en) * 1975-07-31 1976-11-09 Motorola, Inc. Series connected stripline balun
EP0146086A2 (fr) * 1983-12-09 1985-06-26 Polska Akademia Nauk Centrum Badan Kosmicznych Transformateur symétrique-asymétrique à micro-ondes pour mélangeurs et modulateurs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
14TH EUROPEAN MICROWAVE CONFERENCE, Liège, 10th - 13th September 1984, pages 166-171, Microwave Exhibitions and Publishers Ltd, Tunbridge Wells, Kent, GB; W. MARCZEWSKI et al.: "The overlapped microstrip for MICs and MMICs" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5142697A (en) * 1989-09-26 1992-08-25 U.S. Philips Corporation Balanced high-frequency mixer having a balun circuit
DE4321411C1 (de) * 1993-06-26 1994-11-10 Ant Nachrichtentech Symmetrierschaltung
US6018277A (en) * 1997-03-20 2000-01-25 Nokia Mobile Phones Limited Series of strip lines for phasing and balancing a signal

Also Published As

Publication number Publication date
GB8620014D0 (en) 1986-09-24
GB2179801A (en) 1987-03-11
EP0213864A3 (fr) 1988-09-07
JPS6271304A (ja) 1987-04-02
GB8521727D0 (en) 1985-10-02

Similar Documents

Publication Publication Date Title
US4967171A (en) Microwave integrated circuit
US4409608A (en) Recessed interdigitated integrated capacitor
US5446425A (en) Floating potential conductor coupled quarter-wavelength coupled line type directional coupler comprising cut portion formed in ground plane conductor
JPH0783217B2 (ja) フインライン構造体
US10396780B2 (en) High frequency phase shifter using limited ground plane transition and switching arrangement
US20160322942A1 (en) Improved matching techniques for wide-bandgap power transistors
KR20020013940A (ko) 발룬 회로
EP1840913A1 (fr) Condensateur et circuit électronique
US6064253A (en) Multiple stage self-biasing RF transistor circuit
EP0213864A2 (fr) Symétriseurs
JP2001501066A (ja) スロットラインとコプレーナ導波路との間の小型能動変換器
EP0411919B1 (fr) Circuit d'adaptation de transistor à haute fréquence
US5519233A (en) Microchip capacitor and thin film resistor as circuit elements in internal impedance matching circuit of microwave transistor
EP0412627B1 (fr) Déphaseur en ligne chargée
JP2781788B2 (ja) 方向性結合器
EP1263047B1 (fr) Technique de disposition de C3MOS inductif de la largeur de bande
JPH0767042B2 (ja) 分岐回路
GB1561433A (en) Microstrip-to-slot line transducer
JPH01300701A (ja) コプラナー型アンテナ
JPH01233812A (ja) マイクロ波用多段増幅回路
JP3454201B2 (ja) 高周波分岐／結合装置
US5432430A (en) Phase shifting circuit and method for generating several output signals of different phases
JP2677030B2 (ja) 半導体移相器
JPS6388908A (ja) モノリシツク集積回路
JPS583303A (ja) 位相検出回路

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19880701

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOLDEN, ANTHONY JAMES

Inventor name: OXLEY, CHRISTOPHER HUNTER