CN101989673A - Solid waveguide attenuator with high-power microwave - Google Patents
Solid waveguide attenuator with high-power microwave Download PDFInfo
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- CN101989673A CN101989673A CN2010102601692A CN201010260169A CN101989673A CN 101989673 A CN101989673 A CN 101989673A CN 2010102601692 A CN2010102601692 A CN 2010102601692A CN 201010260169 A CN201010260169 A CN 201010260169A CN 101989673 A CN101989673 A CN 101989673A
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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 the electronic technology field, the particularly a kind of and supporting solid waveguide attenuator of using of power microwave measurement system.This attenuator in use decays to power signal within the scope that measuring system can measure, so that signal is analyzed and measured, improves its measuring accuracy.
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 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 device two classes at present.The 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, cooperate peripheral water-flow circuit again, microwave is realized high-power decay.The water fade device is because to make the material of hydroecium broken easily, and perhaps adhesive strength is not enough and leak, and has work safety hidden danger, simultaneously because peripheral bulky water circulation system makes this class water fade device structure huge, complicated again.
The solid attenuator mainly adopts in waveguide cavity the absorbing material of filling a fixed structure and volume, to reach the purpose of decay power signal.In order to satisfy the requirement of standing-wave ratio, the absorbing material front end generally is wedge shape, wedgelike, grading structure such as stepped.At notification number is CN2107718U, denomination of invention is wedge shape or knife-edge for disclosing a kind of media sheet two ends in the patent documentation of " circular recess wave guide attenuator ", in the dieelctric sheet surface applied or plate one deck electromagnetic wave absorbent material, and dieelctric sheet is fixed in the circular recess wave guide, thereby forms described circular recess wave guide attenuator.This circular recess wave guide attenuator, owing to adopt the mode that applies (plating) one deck suction ripple (receipts) material to make attenuator, therefore the absorbing material amount has seldom determined that the decay power amount of attenuator is also little; In addition, this circular recess wave guide attenuator medium sheet has only fraction to contact with waveguide, be directly transferred in the waveguide heat seldom, major part can only rely on the air heat radiation.The conductive coefficient of air is 0.024w/mk, generally conductive coefficient is defined as heat guard (material) less than the material of 0.02w/mk, 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 be provided with a slice attenuator in the waveguide centre position, greatly limited the maximum power that attenuator bears, the average power that this type of solid attenuator generally can bear is only about 500W, if the power of microwave is in a single day too high, just can cause attenuator to burn out.Thereby this type of microwave solids waveguide attenuator exists standing-wave ratio bigger, and 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 usefulness, and defective such as range of application is narrow.
Summary of the invention
The objective of the invention is defective at the background technology existence, a kind of HIGH-POWERED MICROWAVES solid waveguide of research and design attenuator, 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 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, effectively improve its measuring accuracy, enlarge purposes such as its range of application.
Solution of the present invention is at background technology radiating efficiency and the low disadvantage of power attenuation amount, before the employing, back inwall is the waveguide annular seal space of the isosceles trapezoid on inclined-plane, adopt sheet metal to be divided into a plurality of cavitys and an attenuator (suction wave plate) is set in each cavity at wave conductor inner chamber direct-axis to (along the microwave transmission direction), so that Electric Field Distribution is tending towards even, both can solve the too high phenomenon of monolithic attenuator temperature, can improve its power capacity and conduction efficiency effectively again, in waveguide cavity, inject the high conduction oil (coefficient of heat conduction is 0.128w/mk) of conduction efficiency simultaneously as heat eliminating medium, with further raising radiating efficiency and power capacity; The present invention promptly 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 interior attenuator of wave conductor annular seal space, key is also to be respectively equipped with the conduction oil oil storage cup in the waveguide both sides, the waveguide annular seal space is for adopting metal spacing block with the annular seal space of its direct-axis to the one group of separate cavities that is separated into the connection of forward and backward both sides, each separate cavities middle part and the metal spacing block attenuator that be arranged in parallel, and also be respectively equipped with a conduction oil import and export that is communicated with oil storage cup in the both sides of annular seal space, equal falling heat-transfer oil in annular seal space and each separate cavities thereof; The upper and lower base of each metal spacing block respectively with the waveguide annular seal space in top and bottom fix, each attenuator then all is fastenedly connected by its base and waveguide annular seal space inner bottom part, the 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 then by oil storage cup and communicating pipe injecting the waveguide annular seal space.
Above-mentioned waveguide annular seal space is the isosceles trapezoid annular seal space that front and back walls is the inclined-plane.Described metal spacing block is that dual-side (waist) is the isosceles trapezoid metal spacing block on inclined-plane, be provided with a gap that is communicated with other separate cavities between the forward and backward inwall of the dual-side of this metal spacing block (waist) and pairing waveguide annular seal space, circulate for conduction oil.And the described one group of separate cavities that is separated into the connection of forward and backward both sides, 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 go up the base be equipped with a gap between the forward and backward inwall of corresponding waveguide annular seal space and the waveguide annular seal space inner top.
The present invention is because the forward and backward inwall of employing is the waveguide annular seal space of the isosceles trapezoid on inclined-plane, and with adopt in the annular seal space metal spacing block with its direct-axis to being separated into the separate cavities that a plurality of forward and backward both sides are communicated with, an attenuator all is set in each separate cavities, the dual-side of metal spacing block and attenuator (waist) is the inclined-plane, reduce standing-wave ratio effectively, improved its power capacity and conduction efficiency, electric field has been divided equally in the setting of metal spacing block again, has strengthened the absorption of attenuator to microwave again effectively; The falling heat-transfer coefficient is that five times conduction oil of air conductive coefficient is as heat-conducting medium, with apace with on the fin of heat transferred outside waveguide in the waveguide annular seal space.Thereby the present invention has standing-wave ratio very little (less than 1.10), radiating efficiency and power attenuation amount have been increased substantially, the average power that can bear is about 20 times of background technology, be used for the power microwave measurement system supporting, high-power signal can be decayed within the scope that measuring system can measure, and attenuation frequency ranges is wide, return loss is little, characteristics such as reliability height.
Description of drawings
Fig. 1 is an 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.
Among the 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
To bear average power is that the microwave solids attenuator of 10KW is an example: it is the BJ22 wave conductor of 990mm that wave conductor 1 adopts length, 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 (promptly highly identical with waveguide cavity 1-1), thick 1mm, upper top and the lower bottom part of tying in waveguide cavity 1-1 welded on upper and lower base respectively, and present embodiment is established 2 spacers and is 3 separate cavities of 34mm for 39.22mm, both sides are wide with annular seal space 1-2 direct-axis is wide in the middle of be separated into; 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, and the lower bottom part with waveguide cavity 1-1 is tightened to one respectively; 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 usefulness of 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 about 20 times of background technology.
Claims (5)
1. HIGH-POWERED MICROWAVES solid waveguide attenuator, comprise outside flange-cooled wave conductor and be located at the interior attenuator of wave conductor annular seal space, it is characterized in that also being respectively equipped with the conduction oil oil storage cup in the waveguide both sides, the waveguide annular seal space is for adopting metal spacing block with the annular seal space of its direct-axis to the one group of separate cavities that is separated into the connection of forward and backward both sides, each separate cavities middle part and the metal spacing block attenuator that be arranged in parallel, and also be respectively equipped with a conduction oil import and export that is communicated with oil storage cup in the both sides of annular seal space, equal falling heat-transfer oil in annular seal space and each separate cavities thereof; The upper and lower base of each metal spacing block respectively with the waveguide annular seal space in top and bottom fix, each attenuator then all is fastenedly connected by its base and waveguide annular seal space inner bottom part, the 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 then by oil storage cup and communicating pipe injecting the waveguide annular seal space.
2. by the described HIGH-POWERED MICROWAVES solid waveguide of claim 1 attenuator, it is characterized in that described waveguide annular seal space is the isosceles trapezoid annular seal space that front and back walls is the inclined-plane.
3. by the described HIGH-POWERED MICROWAVES solid waveguide of claim 1 attenuator, it is characterized in that described metal spacing block is that dual-side is the isosceles trapezoid metal spacing block on inclined-plane, be provided with a gap that is communicated with other separate cavities between the forward and backward inwall of the dual-side of this metal spacing block and pairing waveguide annular seal space, circulate for conduction oil.
4. by the described HIGH-POWERED MICROWAVES solid waveguide of claim 1 attenuator, the number that it is characterized in that described one group of separate cavities is 2-5.
5. by the described HIGH-POWERED MICROWAVES solid waveguide of claim 1 attenuator, it is characterized in that the dual-side of described each attenuator and go up the base be equipped with a gap between the forward and backward inwall of corresponding waveguide annular seal space and the waveguide annular seal space inner top.
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 |
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| 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 |
|---|---|
| CN101989673A true CN101989673A (en) | 2011-03-23 |
| CN101989673B CN101989673B (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010260169.2A Expired - Fee Related CN101989673B (en) | 2010-08-20 | 2010-08-20 | Solid waveguide attenuator with high-power microwave |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113241508A (en) * | 2021-05-24 | 2021-08-10 | 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107718U (en) * | 1991-12-19 | 1992-06-17 | 东南大学 | Circular-groove waveguide attenuator |
| JP2002217607A (en) * | 2001-01-15 | 2002-08-02 | Nec Eng Ltd | Waveguide attenuator |
-
2010
- 2010-08-20 CN CN201010260169.2A patent/CN101989673B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107718U (en) * | 1991-12-19 | 1992-06-17 | 东南大学 | Circular-groove waveguide attenuator |
| JP2002217607A (en) * | 2001-01-15 | 2002-08-02 | Nec Eng Ltd | Waveguide attenuator |
Non-Patent Citations (1)
| Title |
|---|
| 张翠翠等: "用于高功率微波测量***的干负载设计", 《电子测量技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113241508A (en) * | 2021-05-24 | 2021-08-10 | 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 |
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| Publication number | Publication date |
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| CN101989673B (en) | 2014-07-16 |
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