EP0201409B1 - Breitbandiger Richtungskoppler für einen Mikrostreifenleiter - Google Patents

Breitbandiger Richtungskoppler für einen Mikrostreifenleiter Download PDF

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Publication number
EP0201409B1
EP0201409B1 EP86400924A EP86400924A EP0201409B1 EP 0201409 B1 EP0201409 B1 EP 0201409B1 EP 86400924 A EP86400924 A EP 86400924A EP 86400924 A EP86400924 A EP 86400924A EP 0201409 B1 EP0201409 B1 EP 0201409B1
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EP
European Patent Office
Prior art keywords
main line
line section
fraction
core
section
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
EP86400924A
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English (en)
French (fr)
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EP0201409A1 (de
Inventor
René Le Dain
Henri Havot
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Ministere des PTT
Telediffusion de France ets Public de Diffusion
Original Assignee
Ministere des PTT
Telediffusion de France ets Public de Diffusion
Centre National dEtudes des Telecommunications CNET
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Application filed by Ministere des PTT, Telediffusion de France ets Public de Diffusion, 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
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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 directive coupler, usable in a very wide frequency band.
  • couplers for collective or community antenna and for cable television networks, for which it is already desirable to anticipate the evolution of frequencies of use towards high values.
  • this coupler there is no real relationship between this coupler and those 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 provides in particular a directional coupler according to claim 1.
  • 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 a14, A. 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 distributing or deriving signals in a range which 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 consist 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 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 AT. is the wavelength in air corresponding to a frequency chosen in the desired bandwidth and ⁇ 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 Zoe and Zoo 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 metallic 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.

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  • Waveguides (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Waveguide Aerials (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Document Processing Apparatus (AREA)
  • Communication Cables (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Claims (7)

1. Richtkoppler für Streifenleiter-Hauptleitungen, mit einem geradlinigen Hauptleitungsabschnitt und einem Abschnitt einer Streifenleiter-Nebenleitung, dessen Steg (16) mit dem Steg (10) des Hauptleitungsabschnittes über eine Länge von 2J4 gekoppelt ist, wobei λ die Wellenlänge in einem mittleren Bereich des ausgewählten Durchlaßbereiches ist und wobei ein erstes Ende des Nebenleitungsabschnittes mit einem Ausgang zu einer Last verbunden und zur Ausbildung eines Überstandes (L3) der Länge kleiner als λ/16 verlängert ist, dadurch gekennzeichnet, daß der Nebenleitungsabschnitt aus einem ersten Teil (L1), der parallel zum Hauptleitungsabschnitt und in geringer Entfernung von diesem angeordnet ist, um eine feste Kopplung zu haben, und aus einem zweiten Teil (L2) gebildet ist, der vom Hauptleitungsabschnitt abweicht und an seinem freien Ende, das dem zweiten Ende des Nebenleitungsabschnittes entspricht, durch eine charakteristische Impedanz (20) abgeschlossen ist, wobei das freie Ende des ersten Teils (L1) das erste Ende des Nebenleitungsabschnittes bildet, und daß der Überstand parallel zum Hauptleitungsabschnitt (L3) ist, um eine Mikrokapazität zum Abgriff von Energie von der Hauptleitung zu bilden.
2. Koppler nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Teil geradlinig ist und einen konstanten Winkel mit dem Steg (10) der Hauptleitung bildet.
3. Koppler nach Anspruch 1 oder 2 zur Übertragung von Radio- oder Fernsehsignalen im Frequenzbereich von 40 bis 2000 MHz, dadurch gekennzeichnet, daß die Wellenlänge λ diejenige für eine Frequenz von 460 MHz ist.
4. Koppler nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß der erste Teil eine Kopplung mit der Hauptleitung von kleiner als 10 dB aufweist.
5. Koppler nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, daß der Steg (26) des den ersten Teil verlängernden Überstandes dieselbe Dicke wie der Steg des Nebenleitungsabschnittes besitzt.
6. Koppler nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine resistive Impedanz (30) zwischen dem Steg (10) des Hauptleitungsabschnittes und dem Steg (16) des Nebenleitungsabschnittes auf der Höhe des Ausganges (22) zu der Last angeordnet ist.
7. Koppler nach einem der Ansprüche 3 oder 7, dadurch gekennzeichnet, daß die genannte lmpedanz im Bereich zwischen 750 und 1000 Ohm liegt.
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 EP0201409A1 (de) 1986-12-17
EP0201409B1 true 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)

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EP0298434A3 (de) * 1987-07-08 1990-05-02 Siemens Aktiengesellschaft 90-grad Koppler in Dünnschichttechnik
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
DE102011075312A1 (de) * 2011-05-05 2012-11-08 Rohde & Schwarz Gmbh & Co. Kg Quasi-breitbandiger Doherty-Verstärker und diesbezügliche Kondensatorschaltung
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
CN106575812B (zh) 2014-06-12 2020-10-30 天工方案公司 与定向耦合器相关的设备和方法
US9553617B2 (en) 2014-07-24 2017-01-24 Skyworks Solutions, Inc. Apparatus and methods for reconfigurable directional couplers in an RF transceiver with controllable capacitive coupling
US9793592B2 (en) 2014-12-10 2017-10-17 Skyworks Solutions, Inc. RF coupler with decoupled state
TWI720014B (zh) 2015-09-10 2021-03-01 美商西凱渥資訊處理科技公司 用於多頻功率偵測之電磁耦合器及具有電磁耦合器之系統
WO2017136631A1 (en) 2016-02-05 2017-08-10 Skyworks Solutions, Inc. Electromagnetic couplers with multi-band filtering
US10340577B2 (en) 2016-02-17 2019-07-02 Eagantu Ltd. Wide band directional coupler
TWI720128B (zh) 2016-02-29 2021-03-01 美商天工方案公司 整合式濾波器及定向耦合器總成
WO2017172575A1 (en) 2016-03-30 2017-10-05 Skyworks Solutions, Inc. Tunable active silicon for coupler linearity improvement and reconfiguration
WO2017184352A1 (en) 2016-04-18 2017-10-26 Eagantu Ltd. A wide band radio frequency circulator
TWI735568B (zh) 2016-04-29 2021-08-11 美商天工方案公司 補償電磁耦合器
WO2017189825A1 (en) 2016-04-29 2017-11-02 Skyworks Solutions, Inc. Tunable electromagnetic coupler and modules and devices using same
CN109417215B (zh) 2016-05-09 2021-08-24 天工方案公司 具有自动频率检测的自调节电磁耦合器
US10164681B2 (en) 2016-06-06 2018-12-25 Skyworks Solutions, Inc. Isolating noise sources and coupling fields in RF chips
CN109565292B (zh) 2016-06-22 2021-02-05 天工方案公司 用于多频功率检测的电磁耦合器装置和包含其的设备
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
US12057611B2 (en) 2021-06-02 2024-08-06 Skyworks Solutions, Inc. Directional coupler with multiple arrangements of termination
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

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Also Published As

Publication number Publication date
EP0201409A1 (de) 1986-12-17
ATE56313T1 (de) 1990-09-15
FR2581256A1 (fr) 1986-10-31
ES8704293A1 (es) 1987-04-01
US4677399A (en) 1987-06-30
ES554303A0 (es) 1987-04-01
FR2581256B1 (fr) 1988-04-08
DE3673863D1 (de) 1990-10-11

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