CN101989673B - Solid waveguide attenuator with high-power microwave - Google Patents
Solid waveguide attenuator with high-power microwave Download PDFInfo
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- CN101989673B CN101989673B CN201010260169.2A CN201010260169A CN101989673B CN 101989673 B CN101989673 B CN 101989673B CN 201010260169 A CN201010260169 A CN 201010260169A CN 101989673 B CN101989673 B CN 101989673B
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- annular seal
- seal space
- attenuator
- wave conductor
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Abstract
The invention belongs to a solid waveguide attenuator with high-power microwave in a microwave device, comprising a heat dissipation sheet, a conducting oil storage cup, a wave conductor, an isosceles trapezoid sealing cavity, separation cavities which are arranged in the sealing cavity are divided by isosceles trapezoid metal sheets, an isosceles trapezoid attenuation sheet arranged in each separation cavity, a conducting oil inlet tube (opening) and a conducting oil outlet tube (opening) and conducting oils filled in the sealing cavity, wherein the conducting oil inlet tube (opening) and the conducting oil outlet tube (opening) are arranged at two sides of the sealing cavity and are communicated with the conducting oil storage cup. In the solid waveguide attenuator with high-power microwave provided by the invention, as the metal isolation sheets, the attenuation sheets and conducting oils are additionally arranged, the standing-wave ratio can be effectively reduced below 1.10, and the power capacity and the conduction efficiency are improved greatly; and the solid waveguide attenuator with high-power microwave has the characteristics of low standing-wave ratio, high heat-radiating efficiency, high power decrement, wide attenuation frequency range, low return loss and high reliability, is capable of bearing the power which is about 20 times of that in the prior art, is used for matching with a power microwave measurement system for use, and is capable of attenuating the high-power signal to be in a range in which a measurement system can be measured.
Description
Technical field
The invention belongs to the microwave device in electronic technology field, particularly a kind of the and supporting solid waveguide attenuator of using of power microwave measurement system.This attenuator to signal is analyzed and measured, improves its measuring accuracy within use power signal being decayed to the scope that measuring system can measure.
Background technology
Different types of attenuator application is in different fields, as be applied to optics optical attenuator, be applied to the attenuator of microwave regime.Microwave attenuator is one of element the most frequently used in microwave system, especially in power microwave measurement system, often need to utilize within attenuator decays to power signal the scope that measuring system can measure, then signal is analyzed and measured and improves its measuring accuracy.Common HIGH-POWERED MICROWAVES attenuator is divided into dry type attenuator and attenuating liquid device two classes at present.Attenuating liquid device mainly adopts water as attenuating material, water is that a kind of good microwave absorbing material also can be defined as away heat simultaneously, the tubulose of making at the inner useful glass of waveguide, quartz or other microwave low-loss material or the hydroecium of taper, coordinate again peripheral water-flow circuit, microwave is realized to high-power decay.Water fade device is easily broken owing to making the material of hydroecium, or adhesive strength leaks not, has work safety hidden danger, simultaneously due to the huge water circulation system in periphery, makes again this class water fade device huge structure, complexity.
Solid attenuator mainly adopts and in waveguide cavity, fills the absorbing material of a fixed structure and volume, to reach the object of decay power signal.In order to meet the requirement of standing-wave ratio, absorbing material front end is generally wedge shape, wedgelike, the grading structure such as stepped.At notification number, be CN2107718U, denomination of invention is in the patent documentation of < < circular-groove waveguide attenuator > >, to disclose a kind of media sheet two ends to be wedge shape or knife-edge, on dieelctric sheet surface, apply or plate one deck electromagnetic wave absorbent material, and dieelctric sheet is fixed in circular recess wave guide, thereby forms described circular-groove waveguide attenuator.This circular-groove waveguide attenuator, owing to adopting the mode that applies (plating) one deck suction ripple (receipts) material to make attenuator, absorbing material amount seldom, has therefore determined that the decay power amount of attenuator is also little; In addition, this circular-groove waveguide attenuator medium sheet only has fraction to contact with waveguide, is directly transferred to heat in waveguide seldom, major part can only rely on air heat radiation.The conductive coefficient of air is 0.024w/mk, and the material that generally conductive coefficient is less than to 0.02w/mk is defined as heat guard (material), so the radiating efficiency of this attenuator is very low; In addition waveguide internal electric field distribution characteristics be that middle electric field is strong, a little less than the electric field of both sides, this attenuator is owing to only in waveguide centre position, a slice attenuator being set, greatly limited the maximum power that attenuator bears, the average power that this type of solid attenuator generally can bear is 500W left and right only, if once the power of microwave is too high, just can cause attenuator to burn out.Thereby this type of microwave solids waveguide attenuator exists standing-wave ratio larger, attenuation is little, poor reliability, radiating efficiency are low, easily cause attenuator to burn out in using, can not be as HIGH-POWERED MICROWAVES attenuator use, and the defect such as range of application is narrow.
Summary of the invention
The object of the invention is the defect existing for background technology, a kind of solid waveguide attenuator with high-power microwave of research and design, increase substantially its radiating efficiency, power attenuation amount and reliability thereof, realize the lower standing-wave ratio ratio of minimum voltage amplitude (the maximum voltage amplitude with); Can be supporting with power microwave measurement system thereby reach, within high-power signal being decayed to the scope that measuring system can measure so that signal is carried out to accurate analysis and measurement, effectively improve its measuring accuracy, expand the objects such as its range of application.
Solution of the present invention is for background technology radiating efficiency and the low disadvantage of power attenuation amount, before employing, rear inwall is the waveguide annular seal space of the isosceles trapezoid on inclined-plane, at wave conductor inner chamber direct-axis, to (along microwave transmission direction), adopt sheet metal to be divided into a plurality of cavitys and an attenuator (suction wave plate) is set in each cavity, so that Electric Field Distribution is tending towards even, both can solve the phenomenon of monolithic attenuator excess Temperature, can effectively improve its power capacity and conduction efficiency again, in waveguide cavity, inject the conduction oil that conduction efficiency is high (coefficient of heat conduction is 0.128w/mk) as heat eliminating medium simultaneously, further to improve radiating efficiency and power capacity, the present invention realizes its goal of the invention with this.Therefore microwave solids waveguide attenuator of the present invention comprises outside flange-cooled wave conductor and is located at the attenuator in wave conductor annular seal space, key is to be also respectively equipped with conduction oil oil storage cup in waveguide both sides, waveguide annular seal space for adopt metal spacing block by its direct-axis to the annular seal space that is separated into one group of separate cavities that forward and backward both sides are communicated with, each separate cavities middle part and the metal spacing block attenuator that be arranged in parallel, and in the both sides of annular seal space, being also respectively equipped with a conduction oil import and export being communicated with oil storage cup, in annular seal space and each separate cavities thereof, all falling heat-transfer is oily; The upper and lower base of each metal spacing block respectively with waveguide annular seal space in top and bottom fix, each attenuator is all fastenedly connected by its base and waveguide annular seal space inner bottom part, conduction oil oil storage cup is fastenedly connected by communicating pipe and the conduction oil import and export sealed type of being located at waveguide annular seal space both sides, and conduction oil is by oil storage cup and communicating pipe injecting waveguide annular seal space.
Above-mentioned waveguide annular seal space is the isosceles trapezoid annular seal space that front and back walls is inclined-plane.Described metal spacing block is that dual-side (waist) is the isosceles trapezoid metal spacing block on inclined-plane, between the forward and backward inwall of the dual-side of this metal spacing block (waist) and corresponding waveguide annular seal space, be provided with a gap being communicated with other separate cavities, for conduction oil, circulate.And described in be separated into one group of separate cavities that forward and backward both sides are communicated with, the number of its separate cavities is 2-5.Described each separate cavities middle part and the metal spacing block attenuator that be arranged in parallel, the dual-side of each attenuator (waist) and upper base be equipped with a gap between the forward and backward inwall of corresponding waveguide annular seal space and waveguide annular seal space inner top.
The present invention is owing to adopting the waveguide annular seal space of the isosceles trapezoid that forward and backward inwall is inclined-plane, and by annular seal space, adopt metal spacing block by its direct-axis to the separate cavities that is separated into a plurality of forward and backward both sides and is communicated with, an attenuator is all set in each separate cavities, the dual-side of metal spacing block and attenuator (waist) is inclined-plane, effectively reduce standing-wave ratio, improved its power capacity and conduction efficiency, electric field has been divided equally again in the setting of metal spacing block, has effectively strengthened again the absorption of attenuator to microwave; In waveguide annular seal space, falling heat-transfer coefficient is that the conduction oil of five times of air conductive coefficient is as heat-conducting medium, rapidly heat is delivered on the fin outside waveguide.Thereby the present invention has standing-wave ratio very little (being less than 1.10), radiating efficiency and power attenuation amount have been increased substantially, the average power can bear is 20 times of left and right of background technology, for supporting with power microwave measurement system, within high-power signal can being decayed to the scope that measuring system can measure, and attenuation frequency ranges is wide, return loss is little, reliability high.
Accompanying drawing explanation
Fig. 1 is attenuator three-dimensional structure diagram of the present invention (axonometric drawing);
Fig. 2 is the axial cutaway view of attenuator of the present invention (A-A figure);
Fig. 3 is attenuator wave conductor transverse sectional view of the present invention (B-B view) and oil storage cup partial sectional view.
In figure: 1. wave conductor, 1-1. waveguide cavity, 1-2. annular seal space, the forward and backward inclined-plane of 1-3. annular seal space (quartz glass plate), 2 fin, 3. oil storage cup, 3-1. valve, 3-2. communicating pipe, 4. metal spacing block, 5. attenuator, 6. sealing ring, 7. conduction oil.
Embodiment
Take that to bear the microwave solids attenuator that average power is 10KW be example: wave conductor 1 adopts the BJ22 wave conductor of the long 990mm of being, the long 790mm that goes to the bottom of annular seal space 1-2, the long 190mm of upper base, the wide waveguide cavity 1-1 width that is, the forward and backward inclined-plane of annular seal space 1-3 present embodiment adopting quartz glass sheet is symmetrical arranged, quartz glass plate (long * wide * thick) 362 * 122 * 3mm; The long 690mm that goes to the bottom of metal spacing block 4, two waist length are 305mm, high 54.61mm (highly identical with waveguide cavity 1-1), thick 1mm, upper top and the lower bottom part of tying in waveguide cavity 1-1 welded respectively on upper and lower base, present embodiment establish 2 spacers by annular seal space 1-2 direct-axis in the middle of being separated into wide for 39.22mm, both sides are wide is 3 separate cavities of 34mm; Attenuator 5 is divided in 3 separate cavities, the thick 23mm of middle attenuator, the thick 18mm that is of both sides attenuator, each attenuator length of side of going to the bottom is that 720mm, height are 50mm, dual-side (waist) is long is 304mm, is tightened to one respectively with the lower bottom part of waveguide cavity 1-1; Oil storage cup 3 (diameter * height) 80 * 100mm, communicating pipe 3-2 internal diameter Φ 10mm; Present embodiment conduction oil 7 adopts 320# oil.
The supporting use of the present embodiment solid attenuator and microwave measurement system, its attenuation scope is 54.5dB-57.25dB, and standing-wave ratio VSWR is less than 1.06, and return loss is very little, has good matching properties; Can bear average power is 10KW, is 20 times of left and right of background technology.
Claims (4)
1. a solid waveguide attenuator with high-power microwave, comprise outside flange-cooled wave conductor and be located at the attenuator in wave conductor annular seal space, it is characterized in that being also respectively equipped with conduction oil oil storage cup in waveguide both sides, wave conductor annular seal space for adopt metal spacing block by its direct-axis to before being separated into, the annular seal space of one group of separate cavities that rear both sides are communicated with, before the dual-side of this metal spacing block and corresponding wave conductor annular seal space, between rear inwall, be provided with a gap being communicated with other separate cavities, for conduction oil, circulate, each separate cavities middle part and the metal spacing block attenuator that be arranged in parallel, the dual-side of each attenuator and upper base with corresponding wave conductor annular seal space before, between rear inwall and wave conductor annular seal space inner top, be equipped with a gap, and be also respectively equipped with a conduction oil being communicated with oil storage cup in the both sides of annular seal space, enter, outlet, in annular seal space and each separate cavities thereof, all falling heat-transfer is oily, the upper and lower base of each metal spacing block respectively with waveguide annular seal space in top and bottom fix, each attenuator is all fastenedly connected by its base and wave conductor annular seal space inner bottom part, conduction oil oil storage cup is fastenedly connected by communicating pipe and the conduction oil import and export sealed type of being located at wave conductor annular seal space both sides, and conduction oil is by oil storage cup and communicating pipe injecting wave conductor annular seal space.
2. by solid waveguide attenuator with high-power microwave described in claim 1, it is characterized in that described wave conductor annular seal space is the isosceles trapezoid annular seal space that front and back walls is inclined-plane.
3. by solid waveguide attenuator with high-power microwave described in claim 1, it is characterized in that described metal spacing block is that dual-side is the isosceles trapezoid metal spacing block on inclined-plane.
4. by solid waveguide attenuator with high-power microwave described in claim 1, the number that it is characterized in that described one group of separate cavities is 2-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010260169.2A CN101989673B (en) | 2010-08-20 | 2010-08-20 | Solid waveguide attenuator with high-power microwave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010260169.2A CN101989673B (en) | 2010-08-20 | 2010-08-20 | Solid waveguide attenuator with high-power microwave |
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| Publication Number | Publication Date |
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| CN101989673A CN101989673A (en) | 2011-03-23 |
| CN101989673B true CN101989673B (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010260169.2A Expired - Fee Related CN101989673B (en) | 2010-08-20 | 2010-08-20 | Solid waveguide attenuator with high-power microwave |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113241508B (en) * | 2021-05-24 | 2021-11-26 | 中国电子科技集团公司第四十一研究所 | Manual waveguide attenuation switching device, tester and switching method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107718U (en) * | 1991-12-19 | 1992-06-17 | 东南大学 | Circular-groove waveguide attenuator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002217607A (en) * | 2001-01-15 | 2002-08-02 | Nec Eng Ltd | Waveguide attenuator |
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2010
- 2010-08-20 CN CN201010260169.2A patent/CN101989673B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107718U (en) * | 1991-12-19 | 1992-06-17 | 东南大学 | Circular-groove waveguide attenuator |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2002-217607A 2002.08.02 |
| 张翠翠等.用于高功率微波测量系统的干负载设计.《电子测量技术》.2010,第33卷(第8期), |
| 用于高功率微波测量系统的干负载设计;张翠翠等;《电子测量技术》;20100815;第33卷(第8期);第1-3页 * |
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| CN101989673A (en) | 2011-03-23 |
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