EP2160793A1 - Directional coupler with inductively compensated directionality - Google Patents
Directional coupler with inductively compensated directionalityInfo
- Publication number
- EP2160793A1 EP2160793A1 EP08759243A EP08759243A EP2160793A1 EP 2160793 A1 EP2160793 A1 EP 2160793A1 EP 08759243 A EP08759243 A EP 08759243A EP 08759243 A EP08759243 A EP 08759243A EP 2160793 A1 EP2160793 A1 EP 2160793A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- directional coupler
- terminal
- coupled line
- coupled
- 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
Links
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
Definitions
- the invention relates to a directional coupler for directional transmission of high-frequency signals.
- the invention is based on the object to provide a directional coupler, which has a high directivity in a desired frequency range with little effort of the circuit structure.
- the object is achieved by a directional coupler with the features of independent claim 1.
- Advantageous developments are the subject of the dependent claims.
- the directional coupler according to the invention has at least two coupled lines, at least three terminals and at least one inductor.
- a high frequency signal is transmitted from the first coupled line to the second coupled line.
- the second coupled line has a forward path and a reverse path connected to a common port.
- a first inductance is connected in series with the reverse path.
- the first coupled line advantageously has at least two connections.
- the second coupled line advantageously has at least one connection. This structure allows the imprinting of signals in the circuit and the picking up of signals to the circuit.
- the desired coupling takes place from a first connection of the first line to a connection of the second line.
- Such a coupling is advantageously carried out at maximum low attenuation.
- a coupling from a second terminal of the first line to the terminal of the second line is undesirable.
- Such a coupling is advantageously carried out at high attenuation.
- a high directivity is achievable.
- the second coupled line is connected to an absorber or wave sump.
- the circuit is preferably constructed in stripline technology.
- the circuit is advantageously constructed on the front side of a substrate.
- the back of the substrate is advantageously metallized.
- the wave sump is advantageously formed by an ohmic connection to the metallized rear side of the substrate, which advantageously has reference potential or ground potential. The connection to a wave sump ensures a reflection-free finish.
- the length of the forward path and / or the length of the backward path and / or the size of the first inductance advantageously determine the transmission characteristics and the directivity of the circuit in a frequency-dependent manner. By determining the three parameters, the tuning of the desired frequency response of the directivity is possible.
- the third terminal of the circuit with a second inductance in series, and advantageously connected in parallel with a capacitor.
- the second inductance and the capacitance form an LC element.
- the frequency response of the directivity and the transmission properties on the size of the second inductor and the size of the capacitance can be accurately determined. This allows even greater flexibility of tunability of the frequency response of the directivity.
- two second coupled lines and second first inductances are used. This is advantageously a point-symmetrical structure of the
- FIG. 1 shows a first exemplary basic circuit diagram of a first exemplary embodiment of the directional coupler according to the invention
- FIG. 2 shows an exemplary representation of the arrangement of the components of the first exemplary embodiment of the directional coupler according to the invention
- Fig. 3 shows a second embodiment of the directional coupler according to the invention.
- Fig. 4 is an exemplary illustration of the arrangement of the components of the second embodiment of the directional coupler according to the invention.
- FIG. 1 shows a first exemplary circuit diagram of a directional coupler according to the invention.
- a first conduit 19 is coupled to a second conduit 18.
- the first line has the two terminals 10 and 14.
- the second line is connected to a terminal 12 via a forward path 17 and a reverse path 15.
- the reverse path 15 connected in series or integrated in the reverse path 15 is an inductance 16.
- a coupling 11 of the signals from the terminal 10 to the terminal 12 is desired, while a coupling 13 from the terminal 14 to the terminal 12 is undesirable.
- a superimposition of the signal components is achieved there.
- By an optimized length of the forward path 17 and the return path 15 and an optimized size of the inductance 16 a desired frequency response of the directivity is generated by constructive and destructive interference at the terminal 12.
- FIG. 2 shows a first exemplary representation of the arrangement of the components of the first exemplary embodiment of the directional coupler according to the invention shown in FIG.
- the circuit is constructed on a metallized back substrate 31 in stripline technology.
- the structure forms a directional coupler, which contains connections for both coupling directions.
- a first stripline 32 is terminated with two coaxial terminals 30 and 40.
- Second strip lines 33 and 36 are coupled to the first stripline 32.
- the second strip lines 33 and 36 are connected via a respective forward path 34 and 35 and a respective backward path 39 and 44, each having a coaxial connection 37 and 42.
- Inductors 38 and 43 are connected in series with the reverse paths 39 and 44, and the inductors 38, 42 are integrated in the reverse paths 39, 44.
- the desired coupling directions lead from terminal 30 to terminal 37 and from terminal 40 to terminal 42.
- the undesirable coupling directions lead from terminal 30 to terminal 42 and from terminal 40 to terminal 37.
- By transmitting the signals of the ports 30 and 40 via forward paths 34 and 35 and reverse paths 39 and 44 to the common ports 37 and 42 is achieved by a superposition of the signal components.
- By an optimized length of the forward paths 34 and 35 and the return paths 39 and 44 and an optimized sizes of the inductances 38 and 43 is at the terminals 37 and 42 a desired
- the second strip lines 33 and 36, the associated forward paths 34 and 35, reverse paths 39 and 44, inductors 38, 43 and coaxial terminals 37 and 42 are arranged point symmetrical to a point on the first stripline 32. This results in a directional coupler with four terminals 30, 37, 40 and 42 and two provided coupling directions.
- Fig. 3 shows a second exemplary principle circuit diagram of a second embodiment of the coupler according to the invention.
- a first line 62 is connected to a second one
- the first line has the two terminals 50 and 56.
- the second line is connected to a terminal 53 via a forward path 60 and a reverse path 57.
- the reverse path is connected in series or integrated into this one
- Inductance 59 Connected in series to terminal 53 is a second inductance 54.
- Capacitance 52 is connected in parallel with forward path 60 by connecting forward path 60 via capacitance 52 to capacitance 52 Reference potential or the circuit ground is connected.
- the inductance 54 and the capacitance 52 form an LC element.
- a wave absorber 58 is connected in parallel with the reverse path 57 by connecting the reverse path 57 to the reference potential or the circuit ground via an ohmic resistor 58.
- a coupling 51 of the signals from the terminal 50 to the terminal 53 is desired, while a coupling 55 from the terminal 56 to the terminal 53 is undesirable.
- a superimposition of the signal components is achieved there.
- An optimized length of the forward path 60 and the return path 57 and an optimized size of the inductor 59 a desired frequency response of the directivity is generated by constructive and destructive interference at the terminal 53.
- the additional LC element is used to precisely set the desired frequency response of the directivity.
- FIG. 4 shows a second exemplary representation of the arrangement of the components of a circuit according to the invention corresponding to the exemplary embodiment according to FIG. 3.
- the circuit is constructed on a metallized back substrate 81 in stripline technology.
- the structure forms a directional coupler, which contains connections for both coupling directions.
- a first stripline 82 is terminated with two coaxial terminals 80 and 93.
- Second strip lines 83 and 86 are coupled to the first stripline 82.
- the second strip lines 83 and 86 are connected via a respective forward path 84 and 85 and a respective backward path 92 and 100, each having a coaxial connection 88 and 96.
- the reverse paths 92 and 100 are first Inductors 90 and 98 connected in series.
- the terminals 88 and 96 are second inductances 89 and 97 connected in series.
- the forward paths 84 and 85, in addition, capacitances 87 and 95 are connected in parallel.
- the capacitances 87 and 95 are connected to the metallized back side of the substrate 81.
- the second inductances and the capacitances form LC elements.
- the return paths 92 and 100 are further connected in parallel with shaft bottoms 91 and 99.
- the wells are realized by ohmic connections to the metallized backside of the substrate 81.
- the desired coupling directions lead from terminal 80 to terminal 88 and from terminal 93 to terminal 96.
- the undesired coupling directions lead from terminal 80 to terminal 96 and from terminal 93 to terminal 88. Due to the spatial proximity of the first stripline 82 and the second stripline 83 and 86, the strip lines are electromagnetically coupled.
- Reverse paths 92 and 100 and an optimized magnitudes of the inductors 90 and 98 is generated at the terminals 88 and 96 a desired frequency response of the directivity in a wide frequency band by constructive and destructive interference.
- the additional LC elements are used to precisely set the desired frequency response of the directivity.
- the second strip lines 83 and 86, the associated forward paths 84 and 85, reverse paths 92 and 100, inductors 89, 90 and 97, 98, capacitances 87 and 95, well bottoms 91 and 99, and coaxial ports 88 and 96 are point symmetric to a point on the first Strip line 82 is arranged. This results in a directional coupler with four terminals 80, 88, 93 and 96 and two provided coupling directions.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007029127A DE102007029127A1 (en) | 2007-06-25 | 2007-06-25 | Directional coupler with inductively compensated directivity |
PCT/EP2008/004791 WO2009000434A1 (en) | 2007-06-25 | 2008-06-13 | Directional coupler with inductively compensated directionality |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2160793A1 true EP2160793A1 (en) | 2010-03-10 |
EP2160793B1 EP2160793B1 (en) | 2012-04-04 |
Family
ID=39739758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08759243A Active EP2160793B1 (en) | 2007-06-25 | 2008-06-13 | Directional coupler with inductively compensated directionality |
Country Status (7)
Country | Link |
---|---|
US (1) | US8049575B2 (en) |
EP (1) | EP2160793B1 (en) |
AT (1) | ATE552624T1 (en) |
DE (1) | DE102007029127A1 (en) |
IL (1) | IL202602A0 (en) |
PT (1) | PT2160793E (en) |
WO (1) | WO2009000434A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2463689B (en) * | 2008-09-22 | 2010-11-24 | Ge Aviat Systems Ltd | Arc fault location detection for aircraft wiring |
EP3220477B1 (en) * | 2016-03-17 | 2018-08-15 | AKG Acoustics GmbH | Directional coupler and power splitter made therefrom |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1112559B (en) | 1960-04-21 | 1961-08-10 | Siemens Ag | Arrangement for coupling or decoupling voltages of a wide frequency band using directional couplers consisting of coupling loops |
US5424694A (en) | 1994-06-30 | 1995-06-13 | Alliedsignal Inc. | Miniature directional coupler |
JPH08162812A (en) * | 1994-12-07 | 1996-06-21 | Fujitsu Ltd | High frequency coupler |
JP3289643B2 (en) | 1997-04-11 | 2002-06-10 | 株式会社村田製作所 | Directional coupler |
DE19915246A1 (en) | 1999-04-03 | 2000-10-05 | Philips Corp Intellectual Pty | Thin film broadband coupler e.g. for mobile telephone, has carrier substrate and two strip lines |
SE0000751D0 (en) * | 2000-03-07 | 2000-03-07 | Swetree Genomics Ab | Transgenic trees and methods for their production |
DE10342611A1 (en) * | 2003-09-12 | 2005-04-14 | Hüttinger Elektronik Gmbh + Co. Kg | 90 ° hybrid for splitting or merging high-frequency power |
-
2007
- 2007-06-25 DE DE102007029127A patent/DE102007029127A1/en not_active Withdrawn
-
2008
- 2008-06-13 AT AT08759243T patent/ATE552624T1/en active
- 2008-06-13 US US12/443,807 patent/US8049575B2/en active Active
- 2008-06-13 EP EP08759243A patent/EP2160793B1/en active Active
- 2008-06-13 WO PCT/EP2008/004791 patent/WO2009000434A1/en active Application Filing
- 2008-06-13 PT PT08759243T patent/PT2160793E/en unknown
-
2009
- 2009-12-08 IL IL202602A patent/IL202602A0/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2009000434A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009000434A1 (en) | 2008-12-31 |
EP2160793B1 (en) | 2012-04-04 |
US20100182098A1 (en) | 2010-07-22 |
PT2160793E (en) | 2012-05-25 |
ATE552624T1 (en) | 2012-04-15 |
DE102007029127A1 (en) | 2009-01-02 |
IL202602A0 (en) | 2010-06-30 |
US8049575B2 (en) | 2011-11-01 |
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