CN105826646B - A kind of porous rectangular waveguide directional coupler - Google Patents
A kind of porous rectangular waveguide directional coupler Download PDFInfo
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- CN105826646B CN105826646B CN201610312777.0A CN201610312777A CN105826646B CN 105826646 B CN105826646 B CN 105826646B CN 201610312777 A CN201610312777 A CN 201610312777A CN 105826646 B CN105826646 B CN 105826646B
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- rectangular waveguide
- main
- coupling aperture
- coupling
- directional coupler
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- 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
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Abstract
Include the main rectangular waveguide as microwave main channel, the secondary rectangular waveguide as sampled signal channel and as the coupling aperture of coupling channel the invention discloses a kind of porous rectangular waveguide directional coupler；The faces main mould H of main rectangular waveguide and the faces main mould H of secondary rectangular waveguide are mutually parallel；Main rectangular waveguide and secondary rectangular waveguide are mutually isolated, and the two is connected to by the coupling aperture of the axis arrangement along main rectangular waveguide；Coupling aperture include about main rectangular waveguide wide wall in transmission direction symmetrical first row coupling aperture and second row coupling aperture.Porous rectangular waveguide directional coupler provided by the present invention, simple in structure, easy to process, only there are six coupling apertures for total, can realization be directly processed on cavity using traditional handicraft.By emulation testing, there is wider bandwidth of operation and smaller insertion loss.Relative to traditional waveguide coupler, the present invention is small, simple in structure, can easily be integrated in the circuit of high band.
Description
Technical field
The invention belongs to multi-hole directional coupler technical fields, and in particular to a kind of to be coupled using six symmetrical holes
Porous rectangular waveguide directional coupler.
Background technology
Directional coupler is widely used a kind of microwave/millimeter wave component in microwave system, it is mainly used for letter
Number isolation, separation and mixing；Directional coupler is made of two transmission lines, coaxial line, rectangular waveguide, circular waveguide, strip line
Directional coupler is all may make up with microstrip line etc.；It is widely different so directional coupler type is various from the point of view of structure, but from it
Coupling mechanism from the point of view of be broadly divided into four kinds, i.e. Small aperture coupling, parallel coupling, branch's coupling and the double T of matching.
First directional coupler truly is designed in nineteen forty-four by H.A.Wheeler and is realized, Wheeler is used
The cylinder of a pair of a length of a quarter center frequency wavelength realizes that the energy of electric field and magnetic field intercouples, regrettably this
Kind method can only realize the bandwidth of an octave.
Current main directional coupler includes micro-strip and guide directional coupler, but microstrip line due to transmission loss it is big because
Without being adapted to operate in millimere-wave band, although the nonplanar waves guide structure such as Medium Wave Guide and rectangular waveguide loss very little performance is very
Height, but since volume is big and is difficult to integrated processing, it is difficult to be widely used in highly integrated system.
The advantages of traditional single-hole directional coupler has some：If simple in structure, parameter is few, design is got up more convenient；But
Be it there is also some disadvantages：If narrow bandwidth, directionality are poor, it is suitable to work only at design frequency, drifts out this frequency
Rate, directionality will reduce.
Although conventional porous directional coupler can accomplish that very wide bandwidth, directionality also have to be improved very much, there is also
Some disadvantages, it is excessively high especially in millimeter wave terahertz wave band if volume is big, requirement on machining accuracy is high, insertion loss is high
Insertion Loss makes the device lose use value.
Invention content
Present invention aim to address the above problem, provide it is a kind of it is small, insertion loss is low, with it is wide, can provide it is weak
The porous rectangular waveguide directional coupler of coupling.
In order to solve the above technical problems, the technical scheme is that：A kind of porous rectangular waveguide directional coupler, including
Main rectangular waveguide as microwave main channel, the secondary rectangular waveguide as sampled signal channel and as the coupling of coupling channel
Hole；The faces main mould H of main rectangular waveguide and the faces main mould H of secondary rectangular waveguide are mutually parallel；Main rectangular waveguide and secondary rectangular waveguide phase
Mutually isolation, the two are connected to by the coupling aperture of the axis arrangement along main rectangular waveguide；Coupling aperture includes about main rectangular waveguide
Wide wall symmetrical first row coupling aperture and second row coupling aperture in transmission direction.
Preferably, the first row coupling aperture and second row coupling aperture respectively include three coupling apertures, three couplings often arranged
It closes in hole, the coupling aperture for being located at both sides is symmetrical in the center line of vertical direction about intermediate coupling aperture.
Preferably, in three coupling apertures often arranged, it is rectangle to be located at intermediate coupling aperture, and the coupling aperture for being located at both sides is three
It is angular.
Preferably, in three coupling apertures often arranged, the pitch of holes of coupling aperture is 0.8mm.
Preferably, the coupled section height of the main rectangular waveguide and secondary rectangular waveguide is equal.
Preferably, the narrow wall of the outside of the coupling aperture main rectangular waveguide of side corresponding thereto is tangent.
Preferably, the main rectangular waveguide and secondary rectangular waveguide are the regular metal waveguide of rectangular in cross-section.
Preferably, the main rectangular waveguide is equal with the secondary cross-sectional sizes of rectangular waveguide.
Preferably, one end of the main rectangular waveguide is input terminal, and the other end is straight-through output end；Secondary rectangular waveguide with it is defeated
It is isolation output end to enter end in the same side, in the same side is coupled output with straight-through output end.
Preferably, the secondary rectangular waveguide takes the shape of the letter U.
The beneficial effects of the invention are as follows：
(1) a kind of porous rectangular waveguide directional coupler provided by the present invention, simple in structure, easy to process, whole knot
Only there are six coupling apertures for structure, can realization be directly processed on cavity using traditional handicraft.By emulation testing, have wider
Bandwidth of operation and smaller insertion loss.
(2) relative to traditional waveguide coupler, the present invention is small, simple in structure, can easily be integrated in high band
Circuit in.
(3) main rectangular waveguide and secondary rectangular waveguide are realized by coupling aperture of different shapes and are coupled, all by proportional zoom
The size of coupling aperture can adjust stiffness of coupling, and coupling aperture becomes larger, and couple enhancing, and coupling aperture becomes smaller, and couple decrease, to
Weak coupling can be obtained；Simultaneously can also by changing the isolation distance t between main rectangular waveguide and secondary rectangular waveguide, that is,
The thickness of coupling aperture adjusts stiffness of coupling, and coupling aperture thickness becomes smaller, and couples enhancing, coupling aperture thickness becomes larger, and couples decrease.
(4) coupler has preferable directionality, by the size ratio of fine tuning size coupling aperture, can adjust isolation,
And the degree of coupling will not be much affected, to make directionality be optimized.
Description of the drawings
Fig. 1 is the structural schematic diagram of the porous rectangular waveguide directional coupler of the present invention；
Fig. 2 is the vertical view of the porous rectangular waveguide directional coupler of the present invention；
Fig. 3 is the perspective view of the porous rectangular waveguide directional coupler of the present invention；
Fig. 4 is the size marking schematic diagram of the main rectangular waveguide of the present invention and secondary rectangular waveguide；
Fig. 5 is the size marking schematic diagram of coupling aperture of the present invention；
Fig. 6 is the emulation testing figure of the porous rectangular waveguide directional coupler of the present invention.
Reference sign：1, main rectangular waveguide；2, secondary rectangular waveguide；3, coupling aperture；31, first row coupling aperture；32,
Two row's coupling apertures；4, input terminal；5, output end is led directly to；6, output end is isolated；7, coupled output.
Specific implementation mode
The present invention is described further in the following with reference to the drawings and specific embodiments：
As shown in Figure 1, a kind of porous rectangular waveguide directional coupler of the present invention, includes the main square as microwave main channel
Shape waveguide 1, the secondary rectangular waveguide 2 as sampled signal channel and the coupling aperture 3 as coupling channel；Main rectangular waveguide 1
The faces main mould H and the faces main mould H of secondary rectangular waveguide 2 are mutually parallel, and the faces main mould H said herein are magnetic field face；Main rectangular waveguide 1 and pair
Rectangular waveguide 2 is mutually isolated, and the two is connected to by the coupling aperture 3 of the axis arrangement along main rectangular waveguide 1；Main rectangular waveguide 1
One end is input terminal 4, and the other end is straight-through output end 5, and 4 outer signal source of input terminal enables pumping signal to pass through main rectangle
Waveguide 1；Secondary rectangular waveguide 2 is that output end 6 is isolated in the same side with input terminal 4, in the same side is coupling with straight-through output end 5
Close output end 7.
Coupling aperture 3 include about main rectangular waveguide 1 wide wall in transmission direction symmetrical first row coupling aperture 31
With second row coupling aperture 32.First row coupling aperture 31 and second row coupling aperture 32 respectively include three coupling apertures, three often arranged
In coupling aperture, the coupling aperture for being located at both sides is symmetrical in the center line of vertical direction about intermediate coupling aperture, is located at intermediate coupling
Hole is rectangle, and the coupling aperture for being located at both sides is triangle.The height for three coupling apertures often arranged is equal.
Main rectangular waveguide 1 and secondary rectangular waveguide 2 are the regular metal waveguide of rectangular in cross-section, in the present embodiment, main
Both rectangular waveguide 1 is equal with the cross-sectional sizes of secondary rectangular waveguide 2, i.e., coupled section height is equal, the outside of coupling aperture 3 and its
The narrow wall of the main rectangular waveguide 1 of corresponding side is tangent, while also tangent with the narrow wall of secondary rectangular waveguide 2.Coupling said herein
Section is connected with coupling aperture 3 that section being mutually coupled for main rectangular waveguide 1 and pair rectangular waveguide 2 respectively.
Particularly, secondary rectangular waveguide 2 takes the shape of the letter U, convenient for measuring.
As shown in Fig. 2, Fig. 4 and Fig. 5, the specific size of the porous rectangular waveguide directional coupler in the present embodiment is：It is main
The cross-sectional sizes of rectangular waveguide 1 and secondary rectangular waveguide 2 are 7.112mm × 3.556mm, the wide wall height a=of main rectangular waveguide 1
7.112mm, narrow wall wide degree b=3.556mm.
The pitch of holes d=0.8mm for three coupling apertures often arranged, each coupling aperture have the chamfering of r=0.5mm.
The isolation distance t=0.5mm of main rectangular waveguide 1 and secondary rectangular waveguide 2.
In three coupling apertures often arranged, the triangle coupling aperture length of side w tangent with the narrow wall of main rectangular waveguide 12=
2.2mm, one side length of side h vertical with the side2=2.41mm, the vertical edges are close to rectangle coupling aperture.Rectangle coupling aperture and main square
The tangent length of side w of the narrow wall of shape waveguide 11=2.5mm, one side length of side h vertical with the side1=2.41mm.
As shown in figure 4, the other sizes parameter of U-shaped pair rectangular waveguide 2 and main rectangular waveguide 1 is：l1=10mm, l2=l3
=20mm, R1=3.24mm, R2=10.35mm.
The porous rectangular waveguide directional coupler of above-mentioned size is emulated using HFSS15.0, simulation result such as Fig. 6
It is shown.The present invention frequency characteristic include：Insertion loss S21, return loss S11, decibel isolation S41 and the decibel degree of coupling
S31.Wherein abscissa represents frequency variable；Ordinate represents amplitude scalar, unit dB.The novel porous rectangular wave of the present invention
It leads directional coupler isolation in ka all bands and is more than 28dB, coupling flatness is less than 1dB.And in up to 41.3% bandwidth
The stiffness of coupling that inside may be implemented is -19.79 ± 0.56dB, while while entire waveguide bandwidth reaches, can be contracted significantly
Subtract the volume of coupler.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill can make according to the technical disclosures disclosed by the invention various does not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (8)
1. a kind of porous rectangular waveguide directional coupler, it is characterised in that：It include the main rectangular waveguide as microwave main channel
(1), as the secondary rectangular waveguide (2) in sampled signal channel and as the coupling aperture (3) of coupling channel；Main rectangular waveguide (1)
The faces main mould H and the faces main mould H of secondary rectangular waveguide (2) be mutually parallel；Main rectangular waveguide (1) and secondary rectangular waveguide (2) mutually every
From the two is connected to by the coupling aperture (3) of the axis arrangement along main rectangular waveguide (1)；Coupling aperture (3) includes about main rectangular wave
Lead the wide wall of (1) symmetrical first row coupling aperture (31) and second row coupling aperture (32) in transmission direction；
The first row coupling aperture (31) and second row coupling aperture (32) respectively include three coupling apertures, three coupling apertures often arranged
In, the coupling aperture for being located at both sides is symmetrical in the center line of vertical direction about intermediate coupling aperture；
In three coupling apertures often arranged, it is rectangle to be located at intermediate coupling aperture, and the coupling aperture for being located at both sides is triangle.
2. porous rectangular waveguide directional coupler according to claim 1, it is characterised in that：Three coupling apertures often arranged
In, the pitch of holes of coupling aperture is 0.8mm.
3. porous rectangular waveguide directional coupler according to claim 1, it is characterised in that：The main rectangular waveguide (1)
It is equal with the coupled section height of secondary rectangular waveguide (2).
4. porous rectangular waveguide directional coupler according to claim 1 or 3, it is characterised in that：The coupling aperture (3)
The narrow wall of the outside main rectangular waveguide (1) of side corresponding thereto is tangent.
5. porous rectangular waveguide directional coupler according to claim 1, it is characterised in that：The main rectangular waveguide (1)
It is the regular metal waveguide of rectangular in cross-section with secondary rectangular waveguide (2).
6. porous rectangular waveguide directional coupler according to claim 1 or 5, it is characterised in that：The main rectangular waveguide
(1) and the cross-sectional sizes of secondary rectangular waveguide (2) are equal.
7. porous rectangular waveguide directional coupler according to claim 1, it is characterised in that：The main rectangular waveguide (1)
One end be input terminal (4), the other end is straight-through output end (5)；Secondary rectangular waveguide (2) is in the same side with input terminal (4)
Output end (6) is isolated, in the same side is coupled output (7) with straight-through output end (5).
8. porous rectangular waveguide directional coupler according to claim 1, it is characterised in that：The pair rectangular waveguide (2)
It takes the shape of the letter U.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450642B (en) * | 2016-10-26 | 2019-03-15 | 中国科学院新疆天文台 | A kind of porous coupled mode directional coupler of Q-band |
| CN107134627A (en) * | 2017-06-08 | 2017-09-05 | 中北大学 | Many diamond hole coupled mode guide directional couplers |
| CN107910626B (en) * | 2017-10-13 | 2019-11-15 | 西安电子科技大学 | Multiband based on sharp bending rectangular waveguide minimizes directional coupler |
| CN108091974B (en) * | 2017-12-12 | 2023-11-14 | 江苏德是和通信科技有限公司 | Rectangular waveguide directional coupler |
| CN108649308B (en) * | 2018-05-15 | 2020-09-25 | 电子科技大学 | Improved terahertz branch waveguide coupler |
| CN111370833B (en) * | 2020-03-26 | 2021-04-30 | 清华大学 | Rectangular waveguide directional coupler |
| CN113050220A (en) * | 2021-03-15 | 2021-06-29 | 中国科学院微电子研究所 | Gradual change curved waveguide device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203225326U (en) * | 2012-08-10 | 2013-10-02 | 成都赛纳赛德科技有限公司 | Porous directional coupler provided with main rectangular waveguide and auxiliary rectangular waveguide having different sizes |
| CN104836009A (en) * | 2015-05-22 | 2015-08-12 | 电子科技大学 | Large-power microwave rectangular waveguide directional coupler |
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| US5185046A (en) * | 1991-10-22 | 1993-02-09 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Method for non-destructive estimation of waveguide directional coupler dimensions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203225326U (en) * | 2012-08-10 | 2013-10-02 | 成都赛纳赛德科技有限公司 | Porous directional coupler provided with main rectangular waveguide and auxiliary rectangular waveguide having different sizes |
| CN104836009A (en) * | 2015-05-22 | 2015-08-12 | 电子科技大学 | Large-power microwave rectangular waveguide directional coupler |
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