CN105140614A - Microwave coaxial resonant cavity - Google Patents
Microwave coaxial resonant cavity Download PDFInfo
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- CN105140614A CN105140614A CN201510591387.7A CN201510591387A CN105140614A CN 105140614 A CN105140614 A CN 105140614A CN 201510591387 A CN201510591387 A CN 201510591387A CN 105140614 A CN105140614 A CN 105140614A
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Abstract
The invention relates to a microwave coaxial resonant cavity and belongs to the technical field of measurement of microwave band electromagnetic parameters of materials. The microwave coaxial resonant cavity includes a cavity upper cover, a cavity body, through holes, a hollow metal column and a clamping device which is located in the hollow metal column and is attached to the hollow metal column; the clamping device includes a bolt, a solid metal column and a metal cone; the bolt is attached to the solid metal column; the solid metal column is provided with a protrusion used for positioning; a groove which is matched with the protrusion of the solid metal column is formed in the metal cone; the bolt is connected with the cavity upper cover through a screw thread; the metal cone is composed of two completely-identical parts; a through hole used for positioning a metal probe is formed at the center of the metal cone; the through hole at the center of the metal cone, a through hole at the bottom of the hollow metal column and a through hole at the bottom of the cavity body of the resonant cavity are located at the same axis; and the hollow metal column electrically contacts with the metal probe. With the microwave coaxial resonant cavity of the invention adopted, the installation and replacement of the metal probe can be facilitated, and the metal probe can be located at the center of the resonant cavity assuredly.
Description
Technical field
The invention belongs to the field of measuring technique of material microwave wave band electromagnetism parameter, be specifically related to a kind of Multi-beam klystron.
Background technology
Existing bottom beginning 1/4 λ coaxial resonant cavity, the needle point of its scan-probe is positioned at the center conductor of resonant cavity and slightly exceeds the metal screen layer aperture of cavity bottom, cavity can be made like this to shield diverging wave, the withered field of most advanced and sophisticated formation, be limited in by microwave on needle point in minimum microcell, the resonant cavity of its specific dimensions makes the electromagnetic material measured to special frequency channel electromagnetic response.Needle point as shown in Figure 1, wherein, in order to make measurement result more accurate, need be welded in center conductor by the structure of existing Multi-beam klystron, is located at resonant cavity center and completely vertical with horizontal plane, and welding difficulty increases greatly; Meanwhile, because needle point is fragile, rear and test period need change needle point before testing, adopts the method for welding to waste time and energy, inconvenient operation during replacing, and the center that probe will be made to be positioned at cavity bottom aperture also brings certain technical difficulty to operation; Multiple welding easily makes cavity ageing of metal, and residual scolding tin etc. can affect the accuracy of experiment.
Summary of the invention
The present invention is directed to the defect that background technology exists, propose a kind of Multi-beam klystron, the welding of background technology middle probe can be solved and change inconvenient problem.Multi-beam klystron middle probe of the present invention without the need to being welded on metal column, but by a set of gripping means grips probe, facilitating installation and the replacing of probe, and can not affect measuring accuracy.
Technical scheme of the present invention is as follows:
A kind of Multi-beam klystron, comprise cavity upper cover 1, cavity 2, be positioned at the through hole 3 on cavity upper cover 1, hollow metal post 5, it is characterized in that, also comprise and be positioned at hollow metal post 5 and the clamping device of fitting with hollow metal post, described clamping device comprises the bolt 4 on top, the solid metal column 6 at middle part and the metal centrum 7 of bottom, described bolt 4 is fitted with solid metal column 6, described solid metal column 6 there is a projection for locating, a groove for locating coordinated with solid metal column protrusions is had in described metal centrum, described bolt 4 is connected with cavity upper cover by screw thread, metal centrum 7 is made up of identical two parts, there is the through hole for positioning probe at described metal centrum 7 center, the through hole at metal centrum center, through hole bottom the through hole of hollow metal column bottom and resonant cavity cavity 2 is positioned on same axis, described hollow metal post 5 keeps electrical contact with metal probe 8, metal probe 8 is placed in the through hole at metal centrum center of clamping device, when rotating bolt makes bolt move down, bolt can promote solid metal column and metal centrum moves down, until the inwall of metal centrum and hollow metal column bottom fits tightly, probe can be clamped, probe, then by the through hole of hollow metal post and cavity bottom, realizes detection.
Further, described solid metal column 6 arranges a screwed hole near one end of bolt, to facilitate the taking-up of solid metal column.
Further, when the projection on described solid metal column 6 and the groove fit in metal centrum, can fit tightly, also can have gap.
Further, together with the cavity of described resonant cavity is engaged through the thread with cavity upper cover, the through hole 3 of cavity upper cover is for mounting points coupling or magnetic-coupled coaxial probe or coaxial rings.
Beneficial effect of the present invention is: probe can be placed on the center conductor of resonant cavity by Multi-beam klystron of the present invention quickly and easily, accurately can ensure the horizontal plane of probe perpendicular to lower surface, be positioned at the center of resonant cavity; This resonant cavity can be installed quickly and easily and change metal probe, and metal probe and hollow metal post keep electrical contact, can not affect measuring accuracy.
Accompanying drawing explanation
Fig. 1 is the profile of the traditional microwave coaxial resonant cavity mentioned in background technology; A profile that () is Multi-beam klystron, (b) is the enlarged drawing of metal probe weld;
Fig. 2 is the profile of Multi-beam klystron provided by the invention; A () is the profile of coaxial resonant cavity of the present invention; B profile that () is clamping device; C () is the schematic diagram of clamping device each several part.Wherein, 1 is the cavity upper cover of resonant cavity, and 2 is the cavity of resonant cavity, and 3 is the through hole that cavity covers, and 4 is bolt, and 5 is hollow metal post, and 6 is solid metal column, and 7 is metal centrum, and 8 is metal probe.
Embodiment
Below in conjunction with accompanying drawing the present invention done and introduce further.
As shown in Fig. 2 (a), for a kind of Multi-beam klystron provided by the invention, comprise cavity upper cover 1, cavity 2, be positioned at the through hole 3 on cavity upper cover 1, hollow metal post 5, it is characterized in that, also comprise and be positioned at hollow metal post 5 and the clamping device of fitting with hollow metal post, described clamping device comprises the bolt 4 on top, the solid metal column 6 at middle part and the metal centrum 7 of bottom, described bolt 4 is fitted with solid metal column 6, described solid metal column 6 there is a projection for locating, a groove for locating coordinated with solid metal column projection is had in described metal centrum 7, described bolt 4 is connected with cavity upper cover by screw thread, metal centrum 7 is made up of identical two parts, there is the through hole for positioning metal probe 8 at described metal centrum 7 center, the through hole at metal centrum center, the through hole of hollow metal column bottom and the through hole of resonant cavity cavity bottom are positioned on same axis, described hollow metal post 5 keeps electrical contact with metal probe, metal probe is placed in the through hole at clamping device metal centrum center, when rotating bolt makes bolt move down, bolt can promote solid metal column and metal centrum moves down, projection on solid metal column and the groove fit of metal centrum are to realize the location to metal probe, until the inwall of metal centrum and hollow metal column bottom fits tightly, can clamp probe, probe, then by the through hole of hollow metal post and cavity bottom, realizes detection.
Fig. 2 (b) is the clamping device in Multi-beam klystron of the present invention, described clamping device comprises the metal centrum 7 of the bolt 4 on top, the solid metal column 6 at middle part and bottom, described bolt 4 is fitted with solid metal column 6, projection on described solid metal column 6 and the groove fit in metal centrum 7, to realize the location to metal probe.Fig. 2 (c) is the schematic diagram of clamping device each several part, and wherein, solid metal column 6 arranges a screwed hole near one end of bolt, takes out to facilitate it; Metal centrum 7 is made up of two parts that are identical and that be separated, and center is provided with the through hole positioned metal probe 8, and its effect is grip probe; Bolt 4 is connect by screw thread and resonant cavity cavity top cap.When rotating bolt 4, bolt can promote solid metal column 6 and metal centrum 7 moves to bottom, until metal centrum 7 fits tightly with the inwall of hollow metal post 5, gets final product complete grip probe 8; Projection on solid metal column 6 and the groove fit in metal centrum, to realize object metal probe being positioned resonant cavity center.
Further, the projection of described solid metal column 6 is also provided with the hole to metal probe location.
Further, together with the cavity of described resonant cavity is engaged through the thread with cavity upper cover, the through hole 3 of cavity upper cover is for mounting points coupling or magnetic-coupled coaxial probe or coaxial rings.
When metal probe 8 is installed, metal probe is put into the through hole at metal centrum 7 center, by form the identical of metal centrum and be separated two parts clamp metal probe, then the bolt 4 that cavity covers is twisted, bolt can promote solid metal column and turn down metal centrum, when metal centrum and hollow metal column wall fit tightly, two parts be separated completely of composition metal centrum just can clamp probe; And due to the projection on solid metal column and the groove fit in metal centrum, the accurate location of metal probe can be realized, be located at the center of resonant cavity; Through hole in metal centrum, the through hole of hollow metal column bottom and the through hole of cavity bottom are positioned on same axis, therefore the through hole of metal probe by hollow metal column bottom and the through hole of cavity bottom, realize detection.
Claims (4)
1. a Multi-beam klystron, comprise cavity upper cover (1), cavity (2), be positioned at the through hole (3) on cavity upper cover (1), hollow metal post (5), it is characterized in that, also comprise and be positioned at hollow metal post (5) and the clamping device of fitting with hollow metal post, described clamping device comprises bolt (4), solid metal column (6) and metal centrum (7), described bolt (4) and solid metal column (6) are fitted, described solid metal column (6) there is a projection for locating, a groove coordinated with solid metal column protrusions is had in described metal centrum, described bolt (4) is connected with cavity upper cover by screw thread, metal centrum (7) is made up of identical two parts, there is the through hole for positioning metal probe at described metal centrum (7) center, the through hole at metal centrum center, the through hole of the through hole of hollow metal column bottom and resonant cavity cavity (2) bottom is positioned on same axis, described hollow metal post (5) and metal probe (8) electrical contact, metal probe (8) is placed in the through hole at clamping device metal centrum center, when rotating bolt, bolt can promote solid metal column and metal centrum moves down, until the inwall of metal centrum and hollow metal column bottom fits tightly, get final product grip probe, metal probe, then by the through hole of hollow metal post and cavity bottom, realizes detection.
2. Multi-beam klystron according to claim 1, is characterized in that, described solid metal column (6) arranges a screwed hole, to facilitate the taking-up of solid metal column near one end of bolt.
3. Multi-beam klystron according to claim 1, is characterized in that, when the projection on described solid metal column (6) and the groove fit in metal centrum, can fit tightly, also can have gap.
4. Multi-beam klystron according to claim 1, it is characterized in that, together with the cavity of described resonant cavity is engaged through the thread with cavity upper cover, the through hole (3) of cavity upper cover is for mounting points coupling or magnetic-coupled coaxial probe or coaxial rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591387.7A CN105140614B (en) | 2015-09-15 | 2015-09-15 | A kind of Multi-beam klystron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510591387.7A CN105140614B (en) | 2015-09-15 | 2015-09-15 | A kind of Multi-beam klystron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105140614A true CN105140614A (en) | 2015-12-09 |
| CN105140614B CN105140614B (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510591387.7A Active CN105140614B (en) | 2015-09-15 | 2015-09-15 | A kind of Multi-beam klystron |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248697A (en) * | 2016-07-19 | 2016-12-21 | 电子科技大学 | A kind of microwave detection system |
| WO2018014842A1 (en) * | 2016-07-19 | 2018-01-25 | 电子科技大学 | Coaxial resonant cavity, and system and method for measuring dielectric constant of a material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004045262A (en) * | 2002-07-12 | 2004-02-12 | Aet Japan:Kk | Method for measuring complex dielectric constant using resonator, and instrument for executing the method |
| JP2009229423A (en) * | 2008-03-25 | 2009-10-08 | Kobe Steel Ltd | Near-field probe and electrical characteristic measuring instrument equipped with the same |
| CN201820733U (en) * | 2010-07-28 | 2011-05-04 | 南京三乐电子信息产业集团有限公司 | Passive coaxial gain balancer of travelling wave pipe |
-
2015
- 2015-09-15 CN CN201510591387.7A patent/CN105140614B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004045262A (en) * | 2002-07-12 | 2004-02-12 | Aet Japan:Kk | Method for measuring complex dielectric constant using resonator, and instrument for executing the method |
| JP2009229423A (en) * | 2008-03-25 | 2009-10-08 | Kobe Steel Ltd | Near-field probe and electrical characteristic measuring instrument equipped with the same |
| CN201820733U (en) * | 2010-07-28 | 2011-05-04 | 南京三乐电子信息产业集团有限公司 | Passive coaxial gain balancer of travelling wave pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106248697A (en) * | 2016-07-19 | 2016-12-21 | 电子科技大学 | A kind of microwave detection system |
| WO2018014842A1 (en) * | 2016-07-19 | 2018-01-25 | 电子科技大学 | Coaxial resonant cavity, and system and method for measuring dielectric constant of a material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105140614B (en) | 2018-05-18 |
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