CN102315507B - High-power waveguide directional coupler - Google Patents
High-power waveguide directional coupler Download PDFInfo
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- CN102315507B CN102315507B CN201110188373.2A CN201110188373A CN102315507B CN 102315507 B CN102315507 B CN 102315507B CN 201110188373 A CN201110188373 A CN 201110188373A CN 102315507 B CN102315507 B CN 102315507B
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- waveguide
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- coaxial lines
- directional coupler
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Abstract
The invention discloses a high-power waveguide directional coupler, comprising a waveguide, wherein two coupling holes relative symmetrical about the central axis of a waveguide wall are arranged on a wide edge of the waveguide along the transmission direction of the waveguide and each coupling hole is formed by two round holes and a rectangle hole between the two round holes; two ends of the rectangle hole are respectively communicated with the two round holes, and a metal beam is arranged in the middle part in the rectangle hole; the bottom of the metal beam is parallel and level to an inner wall of the waveguide; two coaxial lines are respectively arranged above the two coupling holes and the central axes of the two coaxial lines are respectively coincident with the central axes of the two round holes of each coupling hole; and a rectangle shell is respectively fixedly connected with the two coaxial lines, the two coaxial lines and the rectangle shell are fixedly arranged at the ends of the two coupling holes and separated and sealed by plastic gaskets, ends of the two coaxial lines are provided with joints respectively, and conductors in the two coaxial lines are connected with metal poles adhered to the plastic gaskets. The coupler disclosed by the invention has the advantages of compact structure, small volume, stable microwave performance, convenience in maintenance and debugging and high yield and is applicable to mass production.
Description
Technical field
The present invention relates to the microwave engineering technical fields such as telecommunications, radar, particularly during microwave transmission for the guide directional coupler of power monitoring.
Background technology
Directional coupler is a kind of four port elements with directional transmissions characteristic of microwave technical field, is typically used as power measurement or monitoring arrangement, forms reflectometer etc.The reflected signal that directional coupler can monitor independently incoming signal power on microwave transmission line and bring due to load mismatch, the thereafter general power detector being formed by microwave diode that connects.Directional coupler need to have higher directivity, could measure exactly incident power and reflection power.Large Power Microwave Transmitter is in communication at present, it is more and more extensive that apply in the field such as radar, electronic countermeasures, especially in the auxiliary heating system of nuclear fusion device tokamak, single tube power output has reached kilowatt even MW class of continuous wave hundreds of, because the power that in the wave detector after directional coupler, microwave diode can pass through is continuously very low, generally only have tens milliwatts, this just needs the degree of coupling of directional coupler very little (arrive-70dB of 50dB).And in order to measure exactly microwave incident and reflection power, directional coupler needs again higher directivity (being at least greater than 20dB).But, in prior art, being with the difference of close coupling, the directional coupler of weak coupling high directivity is difficult to realize.
In addition, the environment that the guide directional coupler of high power transmission need to seal, to inflate in waveguide, improves the breakdown strength of medium, thereby can realize the operation of High power CW.Traditional guide directional coupler can not be realized the sealing in waveguide, thereby is difficult to realize the high power operation of hundred multikilowatt continuous waves.
Summary of the invention
Above-described variety of issue for current existence, the object of this invention is to provide a kind of dual directional coupler structure with hermetically-sealed construction, weak coupling and high directivity, can when moving, High-Power Microwave be coupled out quickly and accurately a small amount of incident power and reflection power, to offer microwave detector, thereby obtain the incoming signal of microwave transmitting and transmit, to monitor the operating state of transmitter.
Technical scheme of the present invention is as follows:
A kind of high-power waveguide directional coupler, include waveguide, it is characterized in that: on the broadside of described waveguide, transmission direction along waveguide is provided with two coupling apertures about wave guide wall central axis symmetry, each coupling aperture forms by two circular holes and the rectangular opening between two circular holes, the two ends of described rectangular opening communicate with two circular holes respectively, and the middle part in rectangular opening is provided with metal beam, and the bottom of described metal beam is concordant with the inwall of waveguide; The top of described two coupling apertures is respectively equipped with two coaxial lines, the axis of two coaxial lines overlaps with the axis of two circular holes of coupling aperture respectively, there is rectangular housing to be fixedly connected with two described coaxial lines respectively, two described coaxial lines are fixedly mounted on the end of two coupling apertures and are mutually isolated and sealed by plastic spacer together with rectangular housing, the end of described two coaxial lines is separately installed with joint, and the center conductor in joint is connected with the Metallic rod being close on plastic spacer.
Described high-power waveguide directional coupler, is characterized in that: the height of described metal beam is lower than the height of rectangular opening.
Described high-power waveguide directional coupler, is characterized in that: described rectangular housing is forming a cavity between two coaxial lines with above coupling aperture, and the shape of cavity is identical with the shape of coupling aperture, and the degree of depth of cavity is different from the degree of depth of coupling aperture.
Described high-power waveguide directional coupler, is characterized in that: described joint is N connector or L16 joint, and the characteristic impedance of joint is 50 ohm.
Described high-power waveguide directional coupler, is characterized in that: along the transmission direction of waveguide, described joint is followed successively by coupling and isolating joint.
Its principle is, waveguide is served as theme, and transmission mode is main mould TE
10mould, the cavity of pad top is by-pass.Slotted eye by wave guide wall top is coupled out portion of energy, at coupling port wave phase, with superimposed, at isolated port wave phase, oppositely cancels out each other.In addition, in mechanical structure, adopted the mode of pressing plastic spacer to reach the sealing in waveguide, so that inflation improves power capacity in waveguide.
The above structure of the present invention is the structure of top, waveguide-coupled hole one side, and the structure of opposite side is identical with said structure.
The above is internal structure of the present invention, and its external support structure can adopt mechanically conventional means to realize, and its external structure can be different.
Adopt structure of the present invention to implement to have processed a collection of 2.45GHz degree of coupling for-62dB weak coupling dual directional coupler, through test proof, more than the directivity of all couplers has all reached 21dB, and many all more than 25dB, fully proved validity of the present invention, rate of finished products is very high.In addition, the present invention once spring in 2011 on 2.45GHz High-Power Microwave testboard, under the environment of sealing inflation, successfully by 200kW High power CW microwave energy.The present invention successfully provide incident power and reflected power signal to after the wave detector that connects, and utilize follow-up protective circuit, monitor exactly the running status of high power klystron microwave source, effectively protected whole microwave system and microwave device.
The present invention can be widely used in various High Power Microwave System, the High Power Microwave System that comprises various pulsing operations and continuous wave operation, such as radar system, accelerator, Tokamak Plasma lower hybrid wave heating system etc., dual directional coupler as a kind of reliable operation, with incident and the reflection power on monitoring microwave transmission line, and the operating state of transmitter.
Beneficial effect of the present invention:
The present invention has compact conformation, volume is little, and microwave property is stable, safeguards and debugs advantage easily, and rate of finished products is high, is suitable for mass production.
Accompanying drawing explanation
Fig. 1 is internal structure schematic diagram of the present invention.
Fig. 2 is the end view of internal structure of the present invention.
Fig. 3 is the degree of coupling of coupler a and the measurement result of isolation of one embodiment of the present of invention one side.
Fig. 4 is the degree of coupling of opposite side coupler b in Fig. 3 and the measurement result of isolation.
Embodiment
As shown in Figure 1, the present invention forms dual directional coupler by two the directional coupler a and the b that are positioned in Guide of Wide Wall, and these two directional couplers are symmetrical about the center line of waveguide broadside.
Internal structure end view of the present invention as shown in Figure 2, adopts on waveguide 1 broadside, along the transmission direction of waveguide, opens two about the grooved coupling aperture of wave guide wall central axis symmetry.Because two coupling aperture top structures are identical, the following stated is the structure of a side.Coupling aperture 2 is comprised of two circular holes in a distance and the rectangular opening between circular hole.In the middle of rectangular opening, be a metal beam 3, crossbeam bottom is concordant with waveguide inwall, and height is lower than hole height.Coupling aperture top adds plastic spacer 4, and it is shaped as rectangle, covers whole coupling aperture 2.Plastic spacer 4 tops are cavitys 5 that the coaxial line inwall on rectangular metal cavity and both sides forms, and cavity 5 is pressed on pad 4.Cavity 5 structures are identical with coupling aperture 2 planes on wave guide wall, but the degree of depth is different.Two coaxial lines 6 and 7 outsides are connection standard N connector or L16 joint respectively, the center conductor axis of two coaxial lines 6 and 7 joints respectively with wave guide wall on coupling circular hole 2 central axes, and center conductor is connected with the Metallic rod 8 being close on plastic spacer 4.Along the transmission direction of waveguide, first coaxial line 6 is coupling port, and second coaxial line 7 is isolated port.
The above structure of the present invention is the structure of top, waveguide-coupled hole one side, forms a directional coupler a.The structure of opposite side is identical with said structure, forms the directional coupler b of another structure.
Coaxial line 6 as above and 7 characteristic impedance are 50 ohm.
The above is internal structure of the present invention, and its external support structure can adopt mechanically conventional means to realize, and its external structure can be diversified.
In the concrete enforcement of the present invention, also can adopt in directional coupler a or b.
In concrete enforcement, when ripple is propagated along direction as shown in Figure 2, no matter to a or b directional coupler, 6 is coupled end, and 7 is isolation end.When direction of wave travel is reverse, 7 is coupled end, and 6 is isolated port.When port 7 connects 50 ohm of matched loads, can measure incident power by port 6.When 6 ports connect 50 ohm of matched loads, can measure reflection power by port 7.
Fig. 3 is the degree of coupling of coupler a and the measurement result of isolation of one embodiment of the present of invention one side.Can find out that its degree of coupling is-62.2dB, directivity is about 30dB.Fig. 4 is the degree of coupling of its opposite side coupler b and the measurement result of isolation.Can find out that its degree of coupling is-62.6dB, directivity is about 25dB.In addition, the present invention once spring in 2011 on 2.45GHz High-Power Microwave testboard, under the environment of sealing inflation, successfully by 200kW High power CW microwave energy.This shows that the present invention has reached the weak coupling of directional coupler and the effect of high directivity, reached the high power operation ability of hundred multikilowatt continuous waves simultaneously, fully proved exploitativeness of the present invention.
Claims (5)
1. a high-power waveguide directional coupler, include waveguide, it is characterized in that: on the broadside of described waveguide, transmission direction along waveguide is provided with two coupling apertures about wave guide wall central axis symmetry, each coupling aperture forms by two circular holes and the rectangular opening between two circular holes, the two ends of described rectangular opening communicate with two circular holes respectively, and the middle part in rectangular opening is provided with metal beam, and the bottom of described metal beam is concordant with the inwall of waveguide; The top of described two coupling apertures is respectively equipped with two coaxial lines, the axis of two coaxial lines overlaps with the axis of two circular holes of coupling aperture respectively, there is rectangular housing to be fixedly connected with two described coaxial lines respectively, two described coaxial lines are fixedly mounted on the end of two coupling apertures and by plastic spacer, coupling aperture and rectangular housing are mutually isolated and sealed together with rectangular housing, the end of described two coaxial lines is separately installed with joint, and the center conductor in joint is connected with the Metallic rod being close on plastic spacer.
2. high-power waveguide directional coupler according to claim 1, is characterized in that: the height of described metal beam is lower than the height of rectangular opening.
3. high-power waveguide directional coupler according to claim 1, it is characterized in that: described rectangular housing is forming a cavity between two coaxial lines with above coupling aperture, the shape of cavity is identical with the shape of coupling aperture, and the degree of depth of cavity is different from the degree of depth of coupling aperture.
4. high-power waveguide directional coupler according to claim 1, is characterized in that: described joint is N connector or L16 joint, and the characteristic impedance of joint is 50 ohm.
5. high-power waveguide directional coupler according to claim 1, is characterized in that: along the transmission direction of waveguide, described joint is followed successively by coupling and isolating joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110188373.2A CN102315507B (en) | 2011-07-07 | 2011-07-07 | High-power waveguide directional coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110188373.2A CN102315507B (en) | 2011-07-07 | 2011-07-07 | High-power waveguide directional coupler |
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| Publication Number | Publication Date |
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| CN102315507A CN102315507A (en) | 2012-01-11 |
| CN102315507B true CN102315507B (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110188373.2A Expired - Fee Related CN102315507B (en) | 2011-07-07 | 2011-07-07 | High-power waveguide directional coupler |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698597B (en) * | 2013-12-27 | 2016-03-09 | 中国人民解放军63655部队 | A kind of high-power microwave power detector |
| CN104882660B (en) * | 2014-04-30 | 2017-11-28 | 西安空间无线电技术研究所 | A kind of C frequency ranges test coupler |
| CN111033889B (en) * | 2018-04-20 | 2021-10-08 | 松下知识产权经营株式会社 | Directional coupler and microwave heating device with same |
| CN111029704A (en) * | 2019-12-17 | 2020-04-17 | 电子科技大学 | Compact waveguide bidirectional coupler |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373688C (en) * | 2005-12-06 | 2008-03-05 | 电子科技大学 | Adjustable single hole coaxial output directional coupler |
| CN201134493Y (en) * | 2007-12-27 | 2008-10-15 | 奥雷通光通讯设备（上海）有限公司 | Novel directional coupler |
| CN101728618A (en) * | 2008-10-28 | 2010-06-09 | 西安恒达微波技术开发公司 | Double ridge waveguide directional coupler |
| JP5558225B2 (en) * | 2009-06-25 | 2014-07-23 | 京セラ株式会社 | Directional coupler |
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2011
- 2011-07-07 CN CN201110188373.2A patent/CN102315507B/en not_active Expired - Fee Related
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| CN102315507A (en) | 2012-01-11 |
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