CN104619059B - Magnetron cathode cable microwave leakage protector - Google Patents
Magnetron cathode cable microwave leakage protector Download PDFInfo
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- CN104619059B CN104619059B CN201410796578.2A CN201410796578A CN104619059B CN 104619059 B CN104619059 B CN 104619059B CN 201410796578 A CN201410796578 A CN 201410796578A CN 104619059 B CN104619059 B CN 104619059B
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- sleeve
- cathode cable
- microwave leakage
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- absorbing material
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Abstract
The present invention relates to magnetron.The invention discloses a kind of magnetron cathode cable microwave leakage protector, utilize coaxial line structure and absorbing material to stop microwave leakage.Technical scheme of the present invention is, magnetron cathode cable microwave leakage protector, comprise joint face, cathode cable, sleeve and short-circuit piece, described joint face is arranged on described sleeve top, described short-circuit piece is arranged on barrel end, and described sleeve cross section is circular, and described sleeve is provided with fin, described cathode cable is connected with joint face along sleeve axis through short-circuit piece, fills absorbing material between described sleeve and cathode cable.The invention has the beneficial effects as follows, the microwave energy that magnetron cathode cable leaks is in coaxial transmission line transmitting procedure, fully absorbed by the absorbing material of filling between sleeve and cathode cable, its heat transformed is dispersed into surrounding space by fin, ensure that the normal work of coaxial line transmission system, improve the reliability of protector, stop microwave leakage.
Description
Technical field
The present invention relates to magnetron, particularly magnetron cathode cable microwave leakage protector.
Background technology
The application of magnetron in industry, science and medical science (IMS) research is increasingly extensive, and application constantly expands.Particularly in industry heating application, have continuous wave, the feature such as high-power, long-time, now the microwave leakage of magnetron will produce detrimental effects to control circuit.In addition for guaranteeing the permanently effective work of electronic product and the electromagnetic protection to environment, various countries have formulated strict electromagnetic compatibility (EMC) standard to electronic product, therefore must be optimized the electromagnetic compatibility of magnetron (EMC) performance.The leakage power of magnetron cathode lead-out wire be can not ignore.Have two kinds to the processing method of this problem at present, namely target lead-out wire adds the combined sleeve of λ/4 chokes sleeve and LC filtering sleeve or chokes sleeve and LC filtering.But these two kinds of structures have certain defect: concerning the chokes sleeve of λ/4, because the microwave that magnetron produces has certain discrete range, quarter-wave condition can not strictly meet, in addition, when microwave energy in chokes sleeve can not consume (capacity exceeding it) in time, microwave also will leak out.To LC filtering sleeve, when working in microwave frequency band, its filtering path must could be limited on transmission line microwave for strict microwave transmission line, thus microwave filtering.
The general method of metal contact wires ground connection that directly adopts carrys out filtering at present, and such microwave is inevitably radiated from earth connection in the air.During test, when the power be carried on earth connection is-30dBm ω, the energy on line reduces along with the rising of frequency.When frequency is higher than 60MHz, the energy of more than 90% is all radiated among space.In addition, test finds along with the radiation of rising magnetron cathode cable at operating frequency place of rated output power continues to raise.
Summary of the invention
Technical problem to be solved by this invention is exactly the shortcoming for prior art microwave leakage protector, provides a kind of magnetron cathode cable microwave leakage protector, utilizes coaxial line structure and absorbing material to stop microwave leakage.
The present invention solve the technical problem, the technical scheme adopted is, magnetron cathode cable microwave leakage protector, is characterized in that, comprise joint face, cathode cable, sleeve and short-circuit piece, described joint face is arranged on described sleeve top, described short-circuit piece is arranged on barrel end, and described sleeve cross section is circular, and described sleeve is provided with fin, described cathode cable is connected with joint face along sleeve axis through short-circuit piece, fills absorbing material between described sleeve and cathode cable.
Magnetron cathode cable microwave leakage protector of the present invention, cathode cable and sleeve form coaxial line transmission system, the microwave energy that magnetron cathode cable leaks is in coaxial transmission line transmitting procedure, fully absorbed by the absorbing material of filling between sleeve and cathode cable, its heat transformed is dispersed into surrounding space by fin, ensure that the normal work of coaxial line transmission system, improve the reliability of protector.In the present invention, short-circuit piece forms coaxial line termination short circuit load, is limited in by microwave energy in length sleeve this section of space, stops microwave leakage to greatest extent.
Further, described sleeve diameter is enough large, to ensure to fill absorbing material thickness.
Because sleeve is equivalent to the outer conductor of coaxial line transmission system, its diameter (ignore sleeve thickness and can regard sleeve diameter as), except meeting coaxial transmission line requirement, also should ensure to fill absorbing material thickness, be beneficial to microwave and fully absorb.
Concrete, described absorbing material is the ECCOSORBSF model absorbing material of Emerson company.
Further, described fin is uniformly distributed along sleeve radial direction.
Further, described fin is along quill shaft to being uniformly distributed.
Fin is uniformly distributed and is conducive to improving radiating efficiency.
Concrete, described joint face, sleeve, short-circuit piece and fin are made up of good conductor.
Adopt good conductor to make joint face, sleeve, short-circuit piece and fin, be beneficial to improve microwave attenuation and prevent microwave leakage, fin adopts good conductor, is beneficial to improve radiating efficiency, ensures that microwave leakage protector normally runs.
More specifically, described good conductor is copper material.
Adopt copper material to make joint face, sleeve, short-circuit piece and fin, there is enough intensity and excellent electrical and thermal conductivity performance, and there is feature easy to process.
The invention has the beneficial effects as follows, adopt coaxial transmission line and real short circuit face structure, microwave strictly can be limited in coaxial line system, greatly reduce microwave leakage.Microwave transmission line is combined with absorbing material, is filled between sleeve and cathode cable with absorbing material, effectively consume and leak microwave power.The present invention efficiently solves the microwave leakage problem that cathode cable produces in magnetron frequency drift situation.Efficiently solve the problem of conventional cathode LC filtering wire spatial microwave radiation.Consume negative electrode timely and effectively and leak microwave power, continuous wave can be applied to, negative electrode microwave leakage that is high-power, that work long hours protects.Can be used for the negative electrode microwave leakage protection of frequency modulated magnetron (broadband).
Accompanying drawing explanation
Fig. 1 is the schematic diagram of embodiment 1;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the schematic diagram of embodiment 2;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is microwave leakage distribution map outside certain magnetron;
Fig. 6 is after installing magnetron cathode cable microwave leakage protector of the present invention, the microwave leakage distribution map at same magnetic keyholed back plate same position place.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
Embodiment 1
The present embodiment is described for the magnetron cathode cable microwave leakage protective sleeve of 2.45GHz.
As shown in Figure 1, 2, this routine magnetron cathode cable microwave leakage protector, comprises sleeve 1, joint face 2, cathode cable 3, short-circuit piece 4, absorbing material 5 and fin 6.This routine absorbing material 5 adopts the ECCOSORBSF model absorbing material of Emerson company, and its electrical loss is just being cut to tan δ
e=5.This routine joint face 2 is arranged on sleeve 1 top, and short-circuit piece 4 is arranged on sleeve 1 end, and from Fig. 1 and Fig. 2, this routine sleeve 1 cross section is circular, and the fin 6 that sleeve 1 is installed axially installs a slice at a certain distance along sleeve 1, uniformly distributes.Cathode cable 2 is connected with joint face 2 along sleeve 1 axis through short-circuit piece 4, is connected with magnetron (not shown) by joint face 2.Absorbing material 5 is filled between sleeve and cathode cable.In this example, sleeve 1, joint face 2, short-circuit piece 4 and fin 6 all adopt good conductor copper material to make.Wherein sleeve diameter D is 2cm, and cathode cable diameter d is 4mm, and short-circuit piece diameter is identical with sleeve diameter.This routine fin 6 adopts diameter to be about 6cm, and center drilling is that the copper sheet of 2cm is enclosed within formation on sleeve 1.In order to reduce microwave leakage and improve radiating efficiency, joint face 2, sleeve 1, fin 6, short-circuit piece 4 and cathode cable 3 are all close contact, the center drilling diameter of short-circuit piece 4 is identical with cathode cable diameter d, forms close contact with cathode cable crust, to reduce microwave leakage.In order to ensure that microwave fully absorbs, sleeve diameter D should be enough large, makes the absorbing material of filling have certain thickness.
As shown in Figure 2, this routine cathode cable 3 forms coaxial transmission line with sleeve 1, and microwave is transmitted in transmission line.Filling absorbing material 5 between sleeve 1 and cathode cable 3 makes microwave be absorbed in transmitting procedure.The diameter of regulating sleeve 1 can meet the requirement of different capacity capacity and working band.By connecing the short circuit load that an apertured disc is formed at sleeve 1 end, make remaining microwave energy reflective return coaxial transmission line and again absorbed by absorbing material 5.Be arranged on the fin 6 on sleeve 1, the heat produced can be distributed in time in lossy microwave process, ensure the normal work of sleeve.
Embodiment 2
As shown in Figure 3, Figure 4, this routine fin is uniformly distributed along sleeve 1 radial direction, and fin becomes radial.This routine fin 6 can adopt rectangle copper sheet to be welded on sleeve to form.These routine other structures of magnetron cathode cable microwave leakage protective device structure are identical with embodiment 1, repeat no more herein.
Adopt magnetron cathode cable microwave leakage protector of the present invention, substitute the design of λ/4 chokes sleeve and LC filtering sleeve, reduce the complexity of design cost and system, there is structure simple, compact small and exquisite, easy to process, with low cost, be easy to the feature of producing.
By actual measurement, before not installing device of the present invention, the leakage electric field in outfield reaches 20V/m at 2.45GHZ frequency, as shown in Figure 5, and after having added apparatus of the present invention, the leakage electric field of same position is only about 7mV/m, as shown in Figure 6, good assimilation effect is reached.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. magnetron cathode cable microwave leakage protector, it is characterized in that, comprise joint face, cathode cable, sleeve and short-circuit piece, described joint face be arranged on described sleeve top and with sleeve close contact, described short-circuit piece be arranged on barrel end and with sleeve close contact, described sleeve cross section is circular, described sleeve is provided with fin, described cathode cable is connected with joint face along sleeve axis through short-circuit piece, described cathode cable and short-circuit piece close contact, absorbing material is filled between described sleeve and cathode cable, described joint face, sleeve, short-circuit piece and fin are made up of good conductor.
2. magnetron cathode cable microwave leakage protector according to claim 1, is characterized in that, described sleeve diameter is enough large, to ensure to fill absorbing material thickness.
3. magnetron cathode cable microwave leakage protector according to claim 1, is characterized in that, described absorbing material is the ECCOSORBSF model absorbing material of Emerson company.
4. magnetron cathode cable microwave leakage protector according to claim 1, it is characterized in that, described fin is uniformly distributed along sleeve radial direction.
5. magnetron cathode cable microwave leakage protector according to claim 1, it is characterized in that, described fin is along quill shaft to being uniformly distributed.
6. magnetron cathode cable microwave leakage protector according to claim 1, it is characterized in that, described good conductor is copper material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796578.2A CN104619059B (en) | 2014-12-19 | 2014-12-19 | Magnetron cathode cable microwave leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410796578.2A CN104619059B (en) | 2014-12-19 | 2014-12-19 | Magnetron cathode cable microwave leakage protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104619059A CN104619059A (en) | 2015-05-13 |
| CN104619059B true CN104619059B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410796578.2A Expired - Fee Related CN104619059B (en) | 2014-12-19 | 2014-12-19 | Magnetron cathode cable microwave leakage protector |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106206220B (en) * | 2016-07-08 | 2017-11-14 | 西南交通大学 | High power magnetron cathode cable microwave leakage protector |
| CN106128916B (en) * | 2016-07-13 | 2017-11-14 | 西南交通大学 | A kind of composite magnetic keyholed back plate cathode cable microwave leakage protector |
| CN109195244B (en) * | 2018-10-29 | 2021-03-19 | 广东美的厨房电器制造有限公司 | Microwave leakage detection method and microwave equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5455405A (en) * | 1993-09-18 | 1995-10-03 | Daewoo Electronics Co., Ltd. | Noise shielding apparatus for magnetron of microwave oven |
| JP2003077401A (en) * | 2001-08-31 | 2003-03-14 | Sanyo Electric Co Ltd | Magnetron |
| US7592887B2 (en) * | 2006-06-30 | 2009-09-22 | Harris Stratex Networks Operating Corporation | Waveguide interface having a choke flange facing a shielding flange |
| CN101702456B (en) * | 2009-11-30 | 2012-11-07 | 西南交通大学 | Minitype broadband throttling device used for transmission shaft in guided wave system |
| JP6016478B2 (en) * | 2012-06-28 | 2016-10-26 | ニチコン株式会社 | Pressure valve for electrolytic capacitor and electrolytic capacitor using the same |
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2014
- 2014-12-19 CN CN201410796578.2A patent/CN104619059B/en not_active Expired - Fee Related
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| CN104619059A (en) | 2015-05-13 |
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Granted publication date: 20160413 Termination date: 20191219 |
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| CF01 | Termination of patent right due to non-payment of annual fee |