EP0201409A1 - Breitbandiger Richtungskoppler für einen Mikrostreifenleiter - Google Patents

Breitbandiger Richtungskoppler für einen Mikrostreifenleiter Download PDF

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Publication number
EP0201409A1
EP0201409A1 EP86400924A EP86400924A EP0201409A1 EP 0201409 A1 EP0201409 A1 EP 0201409A1 EP 86400924 A EP86400924 A EP 86400924A EP 86400924 A EP86400924 A EP 86400924A EP 0201409 A1 EP0201409 A1 EP 0201409A1
Authority
EP
European Patent Office
Prior art keywords
line
fraction
core
section
coupler according
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.)
Granted
Application number
EP86400924A
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English (en)
French (fr)
Other versions
EP0201409B1 (de
Inventor
René Le Dain
Henri Havot
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.)
Ministere des PTT
Telediffusion de France ets Public de Diffusion
Original Assignee
Ministere des PTT
Telediffusion de France ets Public de Diffusion
Etat Francais
Centre National dEtudes des Telecommunications CNET
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 Ministere des PTT, Telediffusion de France ets Public de Diffusion, Etat Francais, Centre National dEtudes des Telecommunications CNET filed Critical Ministere des PTT
Priority to AT86400924T priority Critical patent/ATE56313T1/de
Publication of EP0201409A1 publication Critical patent/EP0201409A1/de
Application granted granted Critical
Publication of EP0201409B1 publication Critical patent/EP0201409B1/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
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
    • H01P5/185—Edge coupled lines

Definitions

  • the invention relates to directional couplers usable for the derivation or distribution of very high frequency signals whose transmission requires the use of microstrip lines.
  • couplers intended for such applications. Many have a low passband and directivity, for example 12 dB over 1 or 2 octaves, and / or high losses, the latter case being notably that of resistor distributors.
  • various applications make it desirable to have a very directional coupler, usable in a very wide frequency band.
  • couplers for collective or community antenna and for cable television networks, for which it is desirable to already foresee the evolution of frequencies of use towards high values.
  • Coupler which, in one embodiment, comprises a section of wire which is, over part of its length, parallel to the central conductor of the coaxial cable and in contact with it. At least one end portion of the sampling section is advantageously oblique to facilitate insertion of the section (column 4, lines 6 to 8). The obliquity of the insertion hole has no other role.
  • this coupler there is no real relationship between this coupler and two concerned by the invention.
  • Their propagation modes are entirely different: in one case, we have a coaxial structure that we seek to modify as little as possible to avoid altering the propagation conditions and performance, in the other case, an asymmetric structure ( microstrip conductor and ground plane) whose performance is improved.
  • we have a homogeneous or almost homogeneous dielectric in the other case, we have a non-homogeneous dielectric, composed of two elements (substrate and air).
  • the invention aims to provide a coupler for microstrip line having low losses and a high directivity, therefore allowing a cascade mounting of several couplers, without excessively penalizing the range, and this in a high frequency range, while remaining low implementation cost.
  • the invention proposes in particular a directional coupler comprising a section of microstrip line whose core is coupled to that of the main line over a length X / 4, being the wavelength in a median part of the bandwidth, this section having a first fraction parallel to the main line and at a short distance from it so as to have a tight coupling and a second fraction diverging from the line and closed on a characteristic impedance, the free end of the the first fraction being connected to the load and this first fraction being extended, over a length of less than X / 16, to constitute a microcapacity for taking energy from the main line.
  • microcapacity extension the spacing from the line will be close to that of the first fraction, gives the coupler a high directivity.
  • a second fraction of the straight section will generally be used and making a constant angle with the main line.
  • the constant coupling of the first fraction will generally be less than 10 dB.
  • the frequency response curve of the coupler can be modeled by modifying the length ratio of the two fractions. It will in particular be possible to carry out a pre-emphasis compensating for the characteristic of the main line.
  • the section may have a total length corresponding to X / 4, ⁇ being the wavelength for a frequency of 460 MHz.
  • the coupler which will be described by way of example is of a type which can be used for distribution or bypass. signals in a range that can reach and exceed five octaves with high directivity and low losses.
  • the coupler is intended to take energy from a core microstrip line 10. This line is produced on an insulating substrate 12, the lower face of which carries a conductive coating 14 (FIG. 2).
  • the substrate 12 may in particular be made of resin - (epoxy resin for example) reinforced, for example, by glass fiber, according to a technology which is that of printed circuits.
  • the coupler comprises a section of microstrip line produced on the substrate 12.
  • This section comprises a core 16 having a first fraction, of length L1, parallel to the core 10 and at a short distance from the latter to ensure tight coupling, and a second fraction, of length L2, diverging from the line and usually straight.
  • the angle ⁇ of the two fractions will generally not exceed 10 ° because, beyond, the coupling ceases to be satisfactory.
  • the free end of the second fraction is provided with an outlet 18 closed on impedance 20, characteristic impedance of the line section 16.
  • the other end of the section is provided with an outlet 22, which constitutes the outlet of the diverter . It is possible to provide, on the output 22, a metallized element 24 of compensation, allowing an adjustment of improvement of the standing wave ratio.
  • the coupler comprises enclosing a microcapacity placed in the extension of the first fraction 16, beyond the outlet 22.
  • This microcapacity is formed by a microstrip element 26 of length L3.
  • the length of microstrip line of the coupler will be given a total length L such that: where is the wavelength in air corresponding to a frequency chosen in the desired bandwidth and c is the dielectric constant of the substrate.
  • the response curve can be modeled by adjusting the ratio of the lengths L1 and L2.
  • the angle between the second fraction and the main line may also vary, but will generally remain much less than 45 °.
  • the calculation will determine, from the spacing between the core 10 and the section 16, the thickness of the substrate and the width of the section 16, the different coupling values C: where Z oe and Z ⁇ are the characteristic impedances in even and odd mode, respectively.
  • the length L3 of the element 26 must remain less than ⁇ / 16, so as not to disturb the operation of the main line. It is the length L3 and the spacing S ( Figure 1) which essentially determine the influence of the element 26: they will be adjusted by experience.
  • the width W of the element 26, on the other hand, has no significant influence on the directivity, and will be chosen in particular as a function of the load connected to the output 22, since it influences the output impedance.
  • the spacing S was 0.3 mm.
  • the angle a was about 3 °.
  • the same thickness of metal coating was used to make the section 16, the outlets 18 and 22 and the element 26.
  • the performance of the coupler is further increased by the addition of an impedance 30 between the core 10 and the section 16, at the level of the output 22.
  • the value Z of this impedance 30 is chosen according to the desired coupling at low frequency. It does not alter the transmission in the rest of the band if it is suitably chosen: a resistor whose value is between 750 and 1000 Ohms has given satisfactory results for the pass band mentioned above. It can be constituted by a discrete component or be integrated on the substrate.

Landscapes

  • Waveguides (AREA)
  • Waveguide Aerials (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Communication Cables (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Document Processing Apparatus (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
EP86400924A 1985-04-26 1986-04-25 Breitbandiger Richtungskoppler für einen Mikrostreifenleiter Expired - Lifetime EP0201409B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86400924T ATE56313T1 (de) 1985-04-26 1986-04-25 Breitbandiger richtungskoppler fuer einen mikrostreifenleiter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8506422A FR2581256B1 (fr) 1985-04-26 1985-04-26 Coupleur directif a large bande pour ligne a microruban
FR8506422 1985-04-26

Publications (2)

Publication Number Publication Date
EP0201409A1 true EP0201409A1 (de) 1986-12-17
EP0201409B1 EP0201409B1 (de) 1990-09-05

Family

ID=9318739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400924A Expired - Lifetime EP0201409B1 (de) 1985-04-26 1986-04-25 Breitbandiger Richtungskoppler für einen Mikrostreifenleiter

Country Status (6)

Country Link
US (1) US4677399A (de)
EP (1) EP0201409B1 (de)
AT (1) ATE56313T1 (de)
DE (1) DE3673863D1 (de)
ES (1) ES8704293A1 (de)
FR (1) FR2581256B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0298434A2 (de) * 1987-07-08 1989-01-11 Siemens Aktiengesellschaft 90-grad Koppler in Dünnschichttechnik
EP2705602B1 (de) * 2011-05-05 2017-06-07 Rohde & Schwarz GmbH & Co. KG Quasi-breitbandiger doherty-verstärker und diesbezügliche kondensatorschaltung

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6624722B2 (en) * 2001-09-12 2003-09-23 Radio Frequency Systems, Inc. Coplanar directional coupler for hybrid geometry
DE10316047B4 (de) * 2003-04-08 2006-11-30 Rohde & Schwarz Gmbh & Co. Kg Richtkoppler in koplanarer Wellenleitertechnik
KR100563790B1 (ko) * 2003-11-27 2006-03-30 심한식 이동 통신용 방향성 커플러
KR100623519B1 (ko) * 2004-04-28 2006-09-19 안달 높은 지향성을 갖는 마이크로스트립 방향성 결합기
US7248129B2 (en) * 2004-05-19 2007-07-24 Xytrans, Inc. Microstrip directional coupler
KR100616672B1 (ko) 2005-02-14 2006-08-28 삼성전기주식회사 정전 용량 보상형 방향성 커플러 및 이를 구비한 다중밴드용 ｉｐｄ
FR2916086B1 (fr) * 2007-05-11 2010-09-03 Thales Sa Coupleur de signaux hyperfrequences en technologie microruban.
TWI394507B (zh) * 2008-12-15 2013-04-21 Univ Nat Taiwan 互補式金屬耦合線
CN101783431A (zh) * 2009-01-16 2010-07-21 庄晴光 互补式金属耦合线
US9318788B2 (en) * 2013-06-05 2016-04-19 Telefonaktiebolaget Lm Ericsson (Publ) Directional coupler
US9755670B2 (en) 2014-05-29 2017-09-05 Skyworks Solutions, Inc. Adaptive load for coupler in broadband multimode multiband front end module
GB2542057B (en) * 2014-06-12 2021-09-29 Skyworks Solutions Inc Devices and methods related to directional couplers
US9496902B2 (en) 2014-07-24 2016-11-15 Skyworks Solutions, Inc. Apparatus and methods for reconfigurable directional couplers in an RF transceiver with selectable phase shifters
US9793592B2 (en) 2014-12-10 2017-10-17 Skyworks Solutions, Inc. RF coupler with decoupled state
WO2017044729A1 (en) 2015-09-10 2017-03-16 Skyworks Solutions, Inc. Electromagnetic couplers for multi-frequency power detection
US9954564B2 (en) 2016-02-05 2018-04-24 Skyworks Solutions, Inc. Electromagnetic couplers with multi-band filtering
US10340577B2 (en) 2016-02-17 2019-07-02 Eagantu Ltd. Wide band directional coupler
WO2017151321A1 (en) 2016-02-29 2017-09-08 Skyworks Solutions, Inc. Integrated filter and directional coupler assemblies
CN109155361B (zh) 2016-03-30 2022-11-08 天工方案公司 用于耦合器线性度改进和重新配置的可调节活性硅
CN108886191A (zh) 2016-04-18 2018-11-23 伊根图有限公司 宽频带射频环形器
CN109314299B (zh) 2016-04-29 2021-09-21 天工方案公司 可调谐电磁耦合器和使用其的模块和装置
WO2017189824A1 (en) 2016-04-29 2017-11-02 Skyworks Solutions, Inc. Compensated electromagnetic coupler
KR20180135080A (ko) 2016-05-09 2018-12-19 스카이워크스 솔루션즈, 인코포레이티드 자동 주파수 검출을 하는 셀프 조정 전자기 결합기
US10164681B2 (en) 2016-06-06 2018-12-25 Skyworks Solutions, Inc. Isolating noise sources and coupling fields in RF chips
US10403955B2 (en) 2016-06-22 2019-09-03 Skyworks Solutions, Inc. Electromagnetic coupler arrangements for multi-frequency power detection, and devices including same
US10522896B2 (en) * 2016-09-20 2019-12-31 Semiconductor Components Industries, Llc Embedded directional couplers and related methods
US10742189B2 (en) 2017-06-06 2020-08-11 Skyworks Solutions, Inc. Switched multi-coupler apparatus and modules and devices using same
CN113904084B (zh) * 2021-10-25 2022-09-27 中国电子科技集团公司第二十九研究所 一种宽带高平坦度微带耦合器设计方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575571A (en) * 1947-05-13 1951-11-20 Hazeltine Research Inc Wave-signal directional coupler
US3063026A (en) * 1960-05-26 1962-11-06 Narda Microwave Corp Coaxial hybrid junctions
US3315182A (en) * 1965-02-02 1967-04-18 Hewlett Packard Co Directional coupler having directivity improving means situated near end of couplingregion
US3390356A (en) * 1965-07-30 1968-06-25 Hewlett Packard Co Tem mode coupler having an exponentially varying coefficient of coupling
US3416102A (en) * 1966-07-07 1968-12-10 Philip D. Hamlin Method and apparatus for tapping a coaxial cable
US3432775A (en) * 1965-10-08 1969-03-11 Hughes Aircraft Co Wide-band hybrid network
DE2016801A1 (de) * 1970-04-08 1971-10-21 Siemens Ag Richtkoppler aus einem Doppelleitungs abschnitt
US3777284A (en) * 1972-03-27 1973-12-04 Us Navy Directional phase-shifting coupler
DE2658364A1 (de) * 1976-12-23 1978-06-29 Hans Juergen Dr Ing Herzog Richtkoppler aus gekoppelten streifenleitungen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4139827A (en) * 1977-02-16 1979-02-13 Krytar High directivity TEM mode strip line coupler and method of making same
GB1598804A (en) * 1977-04-01 1981-09-23 Secr Defence Coupling devices
US4185258A (en) * 1978-05-08 1980-01-22 Sanders Associates, Inc. Broadband high power bias circuit
US4216446A (en) * 1978-08-28 1980-08-05 Motorola, Inc. Quarter wave microstrip directional coupler having improved directivity

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575571A (en) * 1947-05-13 1951-11-20 Hazeltine Research Inc Wave-signal directional coupler
US3063026A (en) * 1960-05-26 1962-11-06 Narda Microwave Corp Coaxial hybrid junctions
US3315182A (en) * 1965-02-02 1967-04-18 Hewlett Packard Co Directional coupler having directivity improving means situated near end of couplingregion
US3390356A (en) * 1965-07-30 1968-06-25 Hewlett Packard Co Tem mode coupler having an exponentially varying coefficient of coupling
US3432775A (en) * 1965-10-08 1969-03-11 Hughes Aircraft Co Wide-band hybrid network
US3416102A (en) * 1966-07-07 1968-12-10 Philip D. Hamlin Method and apparatus for tapping a coaxial cable
DE2016801A1 (de) * 1970-04-08 1971-10-21 Siemens Ag Richtkoppler aus einem Doppelleitungs abschnitt
US3777284A (en) * 1972-03-27 1973-12-04 Us Navy Directional phase-shifting coupler
DE2658364A1 (de) * 1976-12-23 1978-06-29 Hans Juergen Dr Ing Herzog Richtkoppler aus gekoppelten streifenleitungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELECTRONICS LETTERS, vol. 14, no. 3, février 1978, pages 50,51, Hitchin, Herts, GB; H.J. HERZOG: "Microstrip couplers with improved directivity" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0298434A2 (de) * 1987-07-08 1989-01-11 Siemens Aktiengesellschaft 90-grad Koppler in Dünnschichttechnik
EP0298434A3 (de) * 1987-07-08 1990-05-02 Siemens Aktiengesellschaft 90-grad Koppler in Dünnschichttechnik
EP2705602B1 (de) * 2011-05-05 2017-06-07 Rohde & Schwarz GmbH & Co. KG Quasi-breitbandiger doherty-verstärker und diesbezügliche kondensatorschaltung

Also Published As

Publication number Publication date
EP0201409B1 (de) 1990-09-05
FR2581256A1 (fr) 1986-10-31
ES8704293A1 (es) 1987-04-01
DE3673863D1 (de) 1990-10-11
ATE56313T1 (de) 1990-09-15
FR2581256B1 (fr) 1988-04-08
ES554303A0 (es) 1987-04-01
US4677399A (en) 1987-06-30

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