CN101950835A - Liquid-type high-power microwave rectangular waveguide attenuator - Google Patents
Liquid-type high-power microwave rectangular waveguide attenuator Download PDFInfo
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- CN101950835A CN101950835A CN2010102689326A CN201010268932A CN101950835A CN 101950835 A CN101950835 A CN 101950835A CN 2010102689326 A CN2010102689326 A CN 2010102689326A CN 201010268932 A CN201010268932 A CN 201010268932A CN 101950835 A CN101950835 A CN 101950835A
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Abstract
The invention belongs to a liquid-type high-power microwave rectangular waveguide attenuator which is matched with a power microwave measuring system in a microwave device. The liquid-type high-power microwave rectangular waveguide attenuator comprises a wave conductor, a trapezoid body attenuation liquid container, attenuation liquid, a forced circulating cooling system, wherein the trapezoid body attenuation liquid container is arranged in the waveguide body and is provided with an attenuation liquid inlet and an attenuation liquid outlet, the cooling tank containing attenuation liquid is arranged outside the wave conductor and is communicated with, the forced circulating cooling system comprising the attenuation liquid container, a circulating pump and an attenuation liquid circulating pipe. The invention adopts trapezoid body liquid crystal glass as the attenuation liquid container, takes saline solution as attenuation liquid and adds the forced circulating cooling system, and thus the liquid-type high-power microwave rectangular waveguide attenuator has wide working band, good stability, small standing-wave ratio, high power capacity, high cooling efficiency and high bearable maximum average power. If being matched with matched with a power microwave measuring system,, the liquid-type high-power microwave rectangular waveguide attenuator can effectively attenuate large power signal to the range capable of being measured by the measuring system, which provides a favourable condition for accurately analyzing and measuring the signal, is favourable for expanding the application range thereof and the like.
Description
Technical field
The invention belongs to the microwave device in the electronic technology field, particularly a kind of supporting with liquid-type High-Power Microwave rectangular waveguide attenuator with the power microwave measurement system.This attenuator in use decays to high power signals within the scope that measuring system can measure, so that signal is analyzed and measured and improves its measuring accuracy.
Background technology
Microwave attenuator is one of element the most frequently used in the microwave system, especially in the power microwave measurement system, often need utilize attenuator that power signal is decayed within the scope that measuring system can measure, again signal be analyzed and measured, and improve its measuring accuracy.Common HIGH-POWERED MICROWAVES attenuator is divided into dry type attenuator and attenuating liquid two classes at present.The dry type attenuator utilizes solid as microwave absorbing material, and its attenuation is with the frequency instability, thereby the attenuator of this type is generally operational in fixedly frequency, so and the power that bears of low this type of attenuator of solid attenuator radiating efficiency also limited.The attenuating liquid device mainly adopts water as attenuating material, and water is that a kind of microwave absorbing material commonly used also can be defined as away heat simultaneously; Name is called " design of Simulation and the experiment of high power rectangular waveguide adjustable attenuator " (the 38th the 4th phase of volume of " Southeast China University's journal (natural science edition) " July in 2008, P589-592) disclosed technology promptly belongs to this type of attenuating liquid device, this attenuator is decay liquid with water, structure of container is cutter (sheet) shape (is in its chamber decay liquid also for the curved blade shape of infraoral), longitudinally hold up two metallic plates on Narrow Wall of Waveguide groove both sides, dull and stereotyped end face is put a convex upper cover plate, there is screw rod at the cover plate center, screw rod drives driver plate, driver plate drives container and moves up and down in waveguide, its objective is by changing the attenuation that the position of container in waveguide changes attenuator.This attenuator one is owing to adopt water as attenuation medium, though water is a kind of microwave absorbing material commonly used, its poor stability is big with respect to its fluctuation of different working frequency points; The 2nd, attenuation medium (liquid) be shaped as blade shape, liquid measure is few, so the attenuation of attenuator is little, power capacity is little and radiating efficiency is low; With the described structure of this article is example: the maximum average power that its maximum attenuation amount is 10.3dB only, can bear is only about 1.5KW and can only be at steady operation under the 2.45GHz.Therefore, such attenuator exists that the working band of attenuation medium (liquid) is narrow, big, the poor stability of performance difference under the different frequent points, eliminating to heat maximum average power limited, that can bear is lower, also is not suitable as defectives such as HIGH-POWERED MICROWAVES attenuator use.
Summary of the invention
The objective of the invention is defective at the background technology existence, a kind of liquid-type High-Power Microwave of research and design rectangular waveguide attenuator, with the frequency band range of effective its steady operation of expansion and the power capacity of attenuator, the maximum average power that increases substantially its radiating efficiency, power attenuation amount and can bear; Can be supporting thereby reach with the power microwave measurement system, be used for high-power signal is decayed within the scope that measuring system can measure so that signal is accurately analyzed and measured, and effectively improves its measuring accuracy, enlarge purposes such as its range of application.
Solution of the present invention is at narrow, the poor stability of background technology attenuation medium (liquid) working band, disadvantage such as power capacity is little, radiating efficiency is low, and the maximum average power that can bear is little; Adopt salting liquid narrow to overcome working band as attenuation medium, the defective of poor stability, and before adopting, trailing flank be the inclined-plane the prismatoid container as the decay liquid container, prismatoid container direct-axis is placed the wave conductor inner chamber to (along the microwave transmission direction), and the decay liquid forced circulation cooling system outer with being located at wave conductor is communicated with, when rolling up decay liquid, the high-temp liquid medium is passed to the heat radiation that circulates of cooling system outside the wave conductor in the prismatoid container, with the stabilising decay liquid temp, thereby reach stabilising decay device attenuation, increase substantially its power capacity and overcome the attenuating liquid medium and cause the too high drawback of temperature because of continuing to absorb microwave power.Therefore, the present invention includes wave conductor, being provided with decay liquid advances, the decay liquid container and the fixed mechanism thereof of outlet, contain the decay liquid in container, key is also to be provided with one and contains decay liquid cooler bin (jar) outside wave conductor, circulating pump and decay liquid circulation pipe are at interior forced circulation cooling system, and decay liquid is salting liquid, decay is before liquid container then is, trailing flank is the prismatoid container on inclined-plane, on the prismatoid container, lower bottom part also is respectively equipped with decay liquid and advances, the fluid mouth of pipe, advance corresponding to the decay liquid on the prismatoid container at wave conductor top cover plate and lower bottom part, drain pipe oral area position also is respectively equipped with the decay liquid that is connected with the liquid forced circulation cooling system of decaying and advances, liquid outlet joint also is provided with fixing between the upper bottom surface of prismatoid container and cover plate, sealing gasket; Prismatoid container direct-axis is in the fluid mouth of pipe that places wave conductor inner chamber, its bottom inserts wave conductor decay liquid liquid outlet joint, and fixing, the sealing gasket by being located at prismatoid container upper bottom surface and cover plate and wave conductor are fixed into one, also seal between the decay liquid feed tube joint on the prismatoid container decay liquid feed liquor mouth of pipe and the cover plate by fixing, sealing gasket, then by the sealing ring sealing, the decay liquid liquid inlet and outlet pipe joint on the wave conductor then is connected with the forced circulation cooling system by circulation pipe between the decay liquid fluid mouth of pipe and the wave conductor liquid outlet joint.
Above-mentioned prismatoid decay liquid container is a quartz glass prismatoid container.And described salting liquid is metabisulfite solution or sodium chloride solution, and the concentration of solution is 1-3wt%.
The present invention is owing to adopting the isosceles trapezoid quartz container to adopt salting liquid as the liquid of decaying as the decay liquid container, and set up decay liquid forced circulation cooling system; The decay liquid capacity of attenuator is big, standing-wave ratio very little (less than 1.3), power attenuation amount are big, can work and good stability in the wideband section of 1.8-2.6GHz, and the average power that can bear is about 30 times of background technology.Thereby attenuator of the present invention has that the frequency band range of work is wide, good stability, standing-wave ratio are little, has increased substantially power capacity, the radiating efficiency of attenuator and the maximum average power that can bear; Supporting with the power microwave measurement system, high-power signal can be decayed within the scope that measuring system can measure signal is accurately analyzed and measured, can effectively improve its measuring accuracy, enlarge characteristics such as its range of application.
Description of drawings
Fig. 1 is an attenuator three-dimensional structure diagram of the present invention (axonometric drawing);
Fig. 2 is structural representation of the present invention (an axially cutaway view).
Among the figure: 1. wave conductor, 1-1. decay liquid liquid outlet joint, 2. waveguide cover plate, 2-1. decay liquid feed tube joint, 3. fixing, sealing gasket, 4. prismatoid container, the 4-1. feed liquor mouth of pipe, the 4-2. fluid mouth of pipe, 5. decay liquid, 6. sealing gasket, 7. sealing ring.
Embodiment
Wave conductor 1 adopts length to be Φ 9mm, high 70mm, waveguide cover plate 2 (long * wide * thick) 600 * 110 * 3mm, the decay liquid feed tube joint 2-1 internal diameter Φ 15mm on it, high 70mm for the BJ22 wave conductor of 800mm, two decay liquid liquid outlet joint 1-1 internal diameters; Fixing, sealing gasket 3 adopts (long * wide * thick) 200 * 103 * 3mm rubber blanket; Trapezoidal container 4 present embodiment adopting quartz glass, its long 500mm that goes to the bottom, the long 200mm of upper base, wide 103mm, high 52.5mm, thick 3mm, volume 1.91L, feed liquor mouth of pipe 4-1 internal diameter Φ 11mm, high 40mm, two fluid mouth of pipe 4-2 internal diameters are Φ 6mm, high 40mm, and it is the metabisulfite solution of 1-3wt% that decay liquid 5 adopts concentration; In the present embodiment forced circulation cooling system: the water cooling case, the volume 1.0m that establish cooling coil in cooler bin adopts
3The circulating pump model is that bsp27160, flow 16L/ minute, inlet and liquid outlet internal diameter are Φ 15mm, and its liquid outlet directly is connected inlet by flexible pipe and then is connected with two liquid liquid outlet joint 1-1 that decay respectively by tee pipe coupling and flexible pipe with decay liquid feed tube joint 2-1.
The supporting usefulness of present embodiment liquid-type attenuator and microwave measurement system, when decay liquid working temperature about 55 ℃, operating frequency is during at 1.8-2.6GHz, its attenuation is 50.5dB-52.5dB (is background technology about 5 times), voltage standing wave ratio VSWR less than 1.3, volume reflection is very little, has good matching properties; Can bear average power is 50KW, is about 30 times of background technology.Voltage standing wave ratio VSWR less than 1.3, volume reflection is very little, has good matching properties; Can bear average power is 50KW, is about 30 times of background technology.
Claims (3)
1. liquid-type High-Power Microwave rectangular waveguide attenuator, comprise wave conductor, being provided with decay liquid advances, the decay liquid container and the fixed mechanism thereof of outlet, contain the decay liquid in container, it is characterized in that outside wave conductor, also being provided with one and contain decay liquid cooler bin, circulating pump and decay liquid circulation pipe are at interior forced circulation cooling system, and decay liquid is salting liquid, decay is before liquid container then is, trailing flank is the prismatoid container on inclined-plane, on the prismatoid container, lower bottom part also is respectively equipped with decay liquid and advances, the fluid mouth of pipe, advance corresponding to the decay liquid on the prismatoid container at wave conductor top cover plate and lower bottom part, drain pipe oral area position also is respectively equipped with the decay liquid that is connected with the liquid forced circulation cooling system of decaying and advances, liquid outlet joint also is provided with fixing between the upper bottom surface of prismatoid container and cover plate, sealing gasket; Prismatoid container direct-axis is in the fluid mouth of pipe that places wave conductor inner chamber, its bottom inserts wave conductor decay liquid liquid outlet joint, and fixing, the sealing gasket by being located at prismatoid container upper bottom surface and cover plate and wave conductor are fixed into one, also seal between the decay liquid feed tube joint on the prismatoid container decay liquid feed liquor mouth of pipe and the cover plate by fixing, sealing gasket, then by the sealing ring sealing, the decay liquid liquid inlet and outlet pipe joint on the wave conductor then is connected with the forced circulation cooling system by circulation pipe between the decay liquid fluid mouth of pipe and the wave conductor liquid outlet joint.
2. by the described liquid-type High-Power Microwave of claim 1 rectangular waveguide attenuator, it is characterized in that described prismatoid decay liquid container is a quartz glass prismatoid container.
3. by the described liquid-type High-Power Microwave of claim 1 rectangular waveguide attenuator, it is characterized in that described salting liquid is metabisulfite solution or sodium chloride solution, the concentration of solution is 1-3wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010268932 CN101950835B (en) | 2010-08-31 | 2010-08-31 | Liquid-type high-power microwave rectangular waveguide attenuator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010268932 CN101950835B (en) | 2010-08-31 | 2010-08-31 | Liquid-type high-power microwave rectangular waveguide attenuator |
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| CN101950835A true CN101950835A (en) | 2011-01-19 |
| CN101950835B CN101950835B (en) | 2013-05-08 |
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| CN 201010268932 Expired - Fee Related CN101950835B (en) | 2010-08-31 | 2010-08-31 | Liquid-type high-power microwave rectangular waveguide attenuator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520998A (en) * | 2018-07-03 | 2018-09-11 | 安徽帮创智能科技有限公司 | A kind of waveguide adjustable attenuator |
| CN108879053A (en) * | 2018-07-03 | 2018-11-23 | 安徽帮创智能科技有限公司 | A kind of waveguide attenuator |
| CN108879052A (en) * | 2018-07-03 | 2018-11-23 | 安徽帮创智能科技有限公司 | A kind of liquid waveguide adjustable attenuator |
| CN111883892A (en) * | 2020-07-23 | 2020-11-03 | 南京航空航天大学 | Broadband liquid attenuator based on T-shaped resistance network |
| CN111934074A (en) * | 2020-07-23 | 2020-11-13 | 南京航空航天大学 | Broadband liquid attenuator for high-power microwave measurement |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3660784A (en) * | 1970-08-28 | 1972-05-02 | Raytheon Co | Energy absorber and evaporative cooling system |
| US3940719A (en) * | 1974-10-25 | 1976-02-24 | Raytheon Company | Microwave waveguide dissipative load comprising fluid cooled lossy waveguide section |
| RU2034374C1 (en) * | 1992-07-10 | 1995-04-30 | Научно-исследовательский институт радиостроения | Superhigh-frequency attenuator |
| CN2651930Y (en) * | 2003-07-22 | 2004-10-27 | 北京恒福思特科技发展有限责任公司 | Cold medium circulating cooler of microwave radiometer |
-
2010
- 2010-08-31 CN CN 201010268932 patent/CN101950835B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3660784A (en) * | 1970-08-28 | 1972-05-02 | Raytheon Co | Energy absorber and evaporative cooling system |
| US3940719A (en) * | 1974-10-25 | 1976-02-24 | Raytheon Company | Microwave waveguide dissipative load comprising fluid cooled lossy waveguide section |
| RU2034374C1 (en) * | 1992-07-10 | 1995-04-30 | Научно-исследовательский институт радиостроения | Superhigh-frequency attenuator |
| CN2651930Y (en) * | 2003-07-22 | 2004-10-27 | 北京恒福思特科技发展有限责任公司 | Cold medium circulating cooler of microwave radiometer |
Non-Patent Citations (2)
| Title |
|---|
| VARSHA .S ET AL.: "Design of X-Band Waveguide Attenuator", 《IEEE CONFERENCES ON MICROWAVE THEORY AND APPLICATIONS,2008》, 24 November 2008 (2008-11-24), pages 745 - 747, XP031413436 * |
| 沈长圣等: "高功率矩形波导可调衰减器的仿真设计与实验", 《东南大学学报》, vol. 38, no. 4, 31 July 2008 (2008-07-31), pages 589 - 592 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520998A (en) * | 2018-07-03 | 2018-09-11 | 安徽帮创智能科技有限公司 | A kind of waveguide adjustable attenuator |
| CN108879053A (en) * | 2018-07-03 | 2018-11-23 | 安徽帮创智能科技有限公司 | A kind of waveguide attenuator |
| CN108879052A (en) * | 2018-07-03 | 2018-11-23 | 安徽帮创智能科技有限公司 | A kind of liquid waveguide adjustable attenuator |
| CN111883892A (en) * | 2020-07-23 | 2020-11-03 | 南京航空航天大学 | Broadband liquid attenuator based on T-shaped resistance network |
| CN111934074A (en) * | 2020-07-23 | 2020-11-13 | 南京航空航天大学 | Broadband liquid attenuator for high-power microwave measurement |
| CN111883892B (en) * | 2020-07-23 | 2021-05-25 | 南京航空航天大学 | Broadband liquid attenuator based on T-shaped resistance network |
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| CN101950835B (en) | 2013-05-08 |
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