CN104137328B - Directional coupler - Google Patents
Directional coupler Download PDFInfo
- Publication number
- CN104137328B CN104137328B CN201280070947.9A CN201280070947A CN104137328B CN 104137328 B CN104137328 B CN 104137328B CN 201280070947 A CN201280070947 A CN 201280070947A CN 104137328 B CN104137328 B CN 104137328B
- Authority
- CN
- China
- Prior art keywords
- base plate
- directional coupler
- dielectric base
- auxiliary line
- main 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.)
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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
-
- 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
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- Transmitters (AREA)
- Amplifiers (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Directional coupler device involved by present embodiment possesses：Dielectric base plate (10), be formed at described dielectric base plate (10) the main line (11) on surface, the surface being formed at described dielectric base plate (10) or the back side and when overlooking described dielectric base plate (10) and described main line (11) auxiliary line (12) that separates predetermined distance and configure and be arranged between described main line (11) and described auxiliary line (12) and dielectric base plate (10) described in insertion peristome (14).
Description
Technical field
Embodiments of the present invention are related to for example in the power amplifier transmitting powerful digital video transmitter
The directional coupler using.
Background technology
In the past, with regard to the general construction of directional coupler, using the whole face in the back side of dielectric base plate be earth conductor and
Microstrip line construction in its surface construction main line and auxiliary line (directional coupler) pattern.Become a part for auxiliary line
Coupling circuit separates the line pattern that small interval is configured with appropriate length on substrate with main line.
If it is known that in general, by the length of this coupling circuit (between coupling port and isolated port away from
From) being set to λ/4 with respect to the wavelength X of the transmission signal going out from main line detection, then directivity is best.But, in UHF ripple
Section, the circuit length of λ/4 wavelength is longer, and circuit becomes large-scale.Therefore, even directivity is sacrificed on certain degree, also often using tool
There is the loop coupling circuit of the appropriate length shorter than λ/4.
Citation
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 7-336117 publication
Content of the invention
Invention problem to be solved
But, transmit in the device of high-power signal in digital video transmitter power amplifier etc., transmission lines
The level of output is larger, therefore to high-power carry out detection when, pay attention to directional coupler directivity (isolation characteristic).
It is therefore desirable to realize improving the small-sized directional coupler of directivity.
The purpose of present embodiment is, provides high directivity and small-sized directional coupler.
Means for solving the problems
Directional coupler involved by present embodiment possesses：Dielectric base plate；Main line, is formed at described electrolyte base
The surface of plate；Auxiliary line, is formed at surface or the back side of described dielectric base plate, when overlooking described dielectric base plate, this pair
Circuit separates predetermined distance with described main line and configures；Peristome, is arranged between described main line and described auxiliary line, should
Dielectric base plate described in peristome insertion.
Brief description
Fig. 1 is the axonometric chart that the structure to the directional coupler involved by present embodiment is indicated.
Fig. 2 is top view and the sectional view of the directional coupler shown in Fig. 1.
Fig. 3 is the figure that the simulation result to the directional coupler shown in Fig. 1 is indicated.
Fig. 4 is the axonometric chart that the structure to the directional coupler involved by comparative example is indicated.
Fig. 5 is top view and the sectional view of the directional coupler shown in Fig. 4.
Fig. 6 is the figure that the simulation result to the directional coupler shown in Fig. 4 is indicated.
Specific embodiment
Hereinafter, referring to the drawings the directional coupler involved by present embodiment is illustrated.
Fig. 1 is the axonometric chart that the structure to the directional coupler involved by present embodiment is indicated, and will count on the ground
Used in word video transmitter high power amplifier, directional coupler is indicated as one.Fig. 2 (a) is determining of Fig. 1
To the top view of bonder, Fig. 2 (b) is A-A ' sectional view.In addition, in FIG, radome 15 omits.
Main line 11 is configured at the surface of dielectric base plate 10, and auxiliary line 12 is formed at the back side of dielectric base plate 10,
When overlooking dielectric base plate 10, auxiliary line 12 separates predetermined distance with main line 11 and configures.Additionally, with overlapping with auxiliary line 12
Mode be formed with the ground plane 13 of auxiliary line 12 on the surface of dielectric base plate 10.Consider resistance to electric power, main line 11 uses
The suspension circuit configurations of line width can be widened.Auxiliary line 12 is constructed using microstrip.Alternatively, it is also possible to replace by-pass
Road 12 and ground plane 13 and auxiliary line 12 is configured on the surface of dielectric base plate 10.
And, it is provided with peristome 14 between main line 11 and auxiliary line 12.This peristome 14 insertion dielectric base plate 10.
The width W of this peristome 14, the shape of length L, from main line 11 to peristome apart from D1 and from peristome 14 to by-pass
The coupling circuit part on road 12 apart from D2, optimized using electromagnetic-field simulation.
Here, the impact that peristome 14 is caused illustrates.Main line 11 and auxiliary line 12 are facing and clip electricity
The construction of medium substrate 10, is air in its periphery, and the phase velocity of therefore even mould is faster than strange mould, for the deterioration of this directivity.Right
This, in the present embodiment, by arrange peristome 14 make a return journey power down medium substrate 10 a part of electrolyte such that it is able to make
The phase velocity of two moulds is close.For this reason, the directivity of directional coupler can be improved.
The simulation result of the directional coupler involved by present embodiment is shown in Fig. 3.Shown in the formula (1) of following note,
Directivity D of directional coupler can by from input port P1 to degree of coupling I of coupling port P3 with from input port P1 pair
The difference of degree of coupling C of isolated port P4 is calculating.
Directivity D=| I-C | [dB] formula (1)
According to the result of Fig. 3, during by above-mentioned formula (1) calculated direction D, obtain 31dB about directivity.Separately
Outward, the S2 in Fig. 3,1 is equivalent to I, S3,1 is equivalent to C.
Here, in order to be compared with present embodiment, showing the knot of the directional coupler involved by comparative example in Fig. 4
Structure.Fig. 5 (a) is the top view of the directional coupler of Fig. 4, and Fig. 5 (b) is B-B ' sectional view.Except be not provided with peristome 14 with
Outward, it is the structure same with the directional coupler involved by present embodiment.
In Fig. 5 (a), if the length of coupling circuit be Lc (＜ λ/4 wavelength), and be set to main line distance be Dc.Coupling
Right determined by Dc.In general, length Lc that widely uses the coupling circuit of the directional coupler ring shorter than λ/4 wavelength
The distribution construction of antenna-like.However, in this configuration, even mould is different from the phase place transfer rate of strange mould, therefore there is orientation coupling
The shortcoming of the directivity deterioration of clutch.In the case of the weaker loose coupling of the degree of coupling, the directional tendency deteriorating further.
The simulation result of the directional coupler of Fig. 4 is shown in Fig. 6.In the configuration in figure 4, the result according to Fig. 6,
When by above-mentioned formula (1) calculated direction D, directivity is 11dB.
Fig. 3 is compared with Fig. 6, in the directional coupler of present embodiment, compared with the directional coupler of Fig. 4,
Directivity improves 20dB, even if the coupling circuit part of auxiliary line 12 does not have the length of λ/4 wavelength it is also possible to obtain enough
Directivity.Therefore it is known that, the directivity of directional coupler can be improved by arranging this peristome 14.
As previously discussed, in the present embodiment, by the peristome of setting correction between main line and auxiliary line
Directivity can be improved.Even if coupling circuit does not have the length of λ/4 wavelength it is also possible to obtain high directivity.Therefore, by this
Embodiment, is capable of high directivity and small-sized directional coupler.
And, the application examples as the directional coupler involved by present embodiment, such as can be by this directional coupler
It is arranged at UHF (Ultra-High Frequency：Superfrequency) wave band the high power amplifier of digital video transmitter
Output transmission lines.Configure between the synthesis output of power amplifier and out connector, as the output to output
The circuit that level and reflective level are detected.
In addition, being illustrated to several embodiments, but these embodiments are to point out it is intended that not as an example
It is to limit the scope of invention.These new embodiments can be implemented in other various modes, in the purport without departing from invention
In the range of, various omissions, displacement, change can be carried out.These embodiments and its deformation, are contained in scope, the master of invention
Purport, and be contained in invention and its equivalent scope of claim secretary.
Claims (2)
1. a kind of directional coupler is it is characterised in that possess：
Dielectric base plate；
The main line of suspension circuit configurations, is formed at the surface of described dielectric base plate；
The auxiliary line of microstrip construction, is formed at surface or the back side of described dielectric base plate, overlooks described electrolyte
During substrate, this auxiliary line separates predetermined distance with described main line and configures；And
Peristome, is arranged between described main line and described auxiliary line, this dielectric base plate described in peristome insertion,
In the way of overlapping with described auxiliary line, the surface in described dielectric base plate is formed with the ground plane of described auxiliary line.
2. directional coupler as claimed in claim 1 it is characterised in that
With respect to the wavelength X of the transmission signal detecting from described main line, the length of described auxiliary line is shorter than λ/4.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-057525 | 2012-03-14 | ||
| JP2012057525A JP5439527B2 (en) | 2012-03-14 | 2012-03-14 | Directional coupler |
| PCT/JP2012/073664 WO2013136557A1 (en) | 2012-03-14 | 2012-09-14 | Directional coupler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104137328A CN104137328A (en) | 2014-11-05 |
| CN104137328B true CN104137328B (en) | 2017-03-08 |
Family
ID=49160513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280070947.9A Active CN104137328B (en) | 2012-03-14 | 2012-09-14 | Directional coupler |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2827441B1 (en) |
| JP (1) | JP5439527B2 (en) |
| CN (1) | CN104137328B (en) |
| WO (1) | WO2013136557A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018088640A (en) | 2016-11-29 | 2018-06-07 | 株式会社東芝 | Manufacturing method of directional coupler |
| RU188691U1 (en) * | 2019-02-07 | 2019-04-22 | Федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет аэрокосмического приборостроения" | Striped coupler |
| CN112034224B (en) * | 2020-08-25 | 2023-07-14 | 中国电子科技集团公司第三十六研究所 | Coupling detector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4181083B2 (en) * | 2003-12-24 | 2008-11-12 | 三菱電機株式会社 | Plating method and high frequency line |
| JP4356628B2 (en) * | 2005-02-25 | 2009-11-04 | 日本電気株式会社 | Directional coupler |
| CN101577358A (en) * | 2009-06-23 | 2009-11-11 | 北京信息科技大学 | Micromechanical terahertz waveguide, terahertz waveguide type resonant cavity and preparation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2951218A (en) * | 1957-02-19 | 1960-08-30 | Itt | Directional couplings |
| JPS62114301A (en) * | 1985-11-13 | 1987-05-26 | Mitsubishi Electric Corp | Suspended line type directional coupler |
| JP2768411B2 (en) * | 1991-09-30 | 1998-06-25 | 宇部興産株式会社 | Dielectric waveguide directional coupler |
| JPH07336117A (en) | 1994-06-13 | 1995-12-22 | Murata Mfg Co Ltd | Directional coupler |
| KR100339373B1 (en) * | 1998-10-13 | 2002-07-18 | 구자홍 | micro strip coupler and method for fabricating the same |
| FI124514B (en) * | 2006-05-12 | 2014-09-30 | Filtronic Comtek Oy | The directional coupler |
-
2012
- 2012-03-14 JP JP2012057525A patent/JP5439527B2/en active Active
- 2012-09-14 EP EP12871488.8A patent/EP2827441B1/en active Active
- 2012-09-14 CN CN201280070947.9A patent/CN104137328B/en active Active
- 2012-09-14 WO PCT/JP2012/073664 patent/WO2013136557A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4181083B2 (en) * | 2003-12-24 | 2008-11-12 | 三菱電機株式会社 | Plating method and high frequency line |
| JP4356628B2 (en) * | 2005-02-25 | 2009-11-04 | 日本電気株式会社 | Directional coupler |
| CN101577358A (en) * | 2009-06-23 | 2009-11-11 | 北京信息科技大学 | Micromechanical terahertz waveguide, terahertz waveguide type resonant cavity and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5439527B2 (en) | 2014-03-12 |
| EP2827441A4 (en) | 2015-11-04 |
| CN104137328A (en) | 2014-11-05 |
| JP2013192084A (en) | 2013-09-26 |
| EP2827441A1 (en) | 2015-01-21 |
| EP2827441B1 (en) | 2019-10-23 |
| WO2013136557A1 (en) | 2013-09-19 |
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