CN101702456B - Minitype broadband throttling device used for transmission shaft in guided wave system - Google Patents
Minitype broadband throttling device used for transmission shaft in guided wave system Download PDFInfo
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- CN101702456B CN101702456B CN2009102528779A CN200910252877A CN101702456B CN 101702456 B CN101702456 B CN 101702456B CN 2009102528779 A CN2009102528779 A CN 2009102528779A CN 200910252877 A CN200910252877 A CN 200910252877A CN 101702456 B CN101702456 B CN 101702456B
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- transmission shaft
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- inwall
- guided wave
- power transmission
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Abstract
The invention provides a minitype broadband throttling device used for a transmission shaft in a guided wave system, which comprises an inner wall 1, a casing 2, a base 3 and a medium gasket 4 of the throttling device, wherein the top of the inner wall 1 of the throttling device is connected with the casing 2 of the throttling device, and the casing 2 of the throttling device is connected with the base 3 of the throttling device; the inner wall 1 of the throttling device is positioned by the medium gasket 4; and a transmission shaft 5 is positioned in the center of the throttling device, and the transmission shaft 5 and the throttling device are coaxial. The throttling device has small volume, light weight, easy processing, wide frequency band and little microwave leakage, and is suitable for an occasion that a mechanical transmission device is introduced into the guided wave system when a microwave system and a mechanical transmission system work synergically.
Description
Technical field
The present invention relates to the leak-proof device field in microwave transmission field, particularly microwave, be specifically related to a kind of small sized wide-band choke that is applicable to power transmission shaft in the guided wave system.
Background technology
Choke is a kind of device of avoiding microwave to leak.At present, choke is widely used in occasions such as the commissure, the rotary joint in all kinds of mechanical scanning radar, contactless short-circuit plunger, household microwave oven of microwave antenna-feedback system, is the key device of microwave engineering.
Choke structure occurs early using also very extensive.Design [G.L.Gagan, Microwave Transmission Ciranits, M.I.T.Rad.Lab.Ser., McGraw-Hill Book, Co.Inc., New York, N.Y., the vol.9 of coaxial type chokes rotation commissure are proposed since Ragan; 1948] afterwards; Many reports that improve design about choke structure produce thereupon, and Grantion.J.P should be used as comparatively detail analysis [Grantions, J.P. to choke structure in the rotation commissure; Microwave Rotating Joints; Electronic Engineering, 1951, October].But the frequency band of this type choke structure is narrower, can not satisfy wide band requirement in the microwave transmission.Then, scholars such as Muehe have proposed to increase method [C.E, the Muehe of coaxial type chokes rotation commissure frequency band; Quarter-wave Compensation of resonantdiscontinuities, IEEE Trans on Microwave Theory and Techniques, Vol.MTT-7; April; 1959], H.E.King has proposed the design philosophy [H.E.KING of the coaxial choke structure in broadband on the basis of summing up previous finding; Borad-Band Coaxial Choked CouplingDesign; IEEE Transactions on Microwave Theory and Techniques, March1960], this research preferably resolves coaxial type choke structure bandwidth and coupling problems.Along with the development of chokes technology and the needs of practical applications, people have carried out research further to choke structure, and the design of choke structure is advanced towards the direction of little standing wave, low-loss, high-peak power and high-average power; Reported rotary joint [Liu Lian in succession with good reflection characteristic; The design of X-band two-way rotary joint reaches and cuts the research of deciding transition, modern radar, 1997]; Have low-loss, powerful coaxial commissure [Zheng Xiaodong; The design of the coaxial rotation of high power, fire control radar technology, 1989] etc. device.
Utilize these research, people are according to the needs of practical application, respective design the device that utilizes the chokes principle miscellaneous; More typically comprise microwave heating chokes [Chen Shaoping, the research of open type microwave applicator, modern electronic technology; 2006 (7)], antenna [IEEE 1998 for Xiang-YU Cao, Analysisof Coaxial Multimode Horn of Two Chokes], the Dual-channel Combinatorial Rotary Joint [Wang Qunjie etc. of band choke structure; Design of Dual-channel Combinatorial Rotary Joint; Fire control radar technology, 2006] etc., they mostly successful Application in the microwave system.Because choke structure is applied to rotate commissure and antenna rotary joint the earliest, so the application of chokes technology in them is also extensive, the corresponding coaxial-type rotary joint [army of residence that developed; The engineering design of door knob mode waveguide-coaxial commissure, microwave journal, Vol 19 No.4; Dec 2003], circular waveguide formula rotary joint [Zhu Yiping; The design and the simulation study of high power circular rotation interlinkage, radar and antagonism, 2006], choke structure such as microstrip coupled formula rotary joint.
But also be not specifically designed to the choke of mechanical drive shaft at present.And along with the development of electromechanical integration and deeply, the collaborative use of machine driven system and microwave system is also more and more frequent.When power transmission shaft gets into guided wave system when inner, the slit must be left in the junction at it and guided wave system edge.These slits will cause microwave leakage, and to the standing wave of guided wave system, performances such as loss and power capacity cause and have a strong impact on simultaneously.Therefore, when mechanical transmissioning technology is applied in the microwave guided wave system, consider the chokes problem in the transmission process with regard to having to.Designing a kind of small sized wide-band choke that is applicable to power transmission shaft in the guided wave system, is very important for microwave system and the collaborative occasion of using of machine driven system.Simultaneously, consider the actual demand in mechanical engineering and the microwave engineering, this choke structure should have miniaturization and wide band characteristics.
Summary of the invention
The object of the invention just provides a kind of small sized wide-band choke that is used for the guided wave system power transmission shaft.This choke can be used for solving in the guided wave system introduce mechanical drive shaft after, the microwave leakage problem that the power transmission shaft porch possibly caused has that volume is little, in light weight, a bandwidth, characteristics that energy leakage is few.
The present invention solves its technical problem; The technical scheme that is adopted is: a kind of small sized wide-band choke that is used for the guided wave system power transmission shaft; It consists of:: the top upper surface of folding is fixed on the guided wave system of band power transmission shaft in the columnar shell; The inside top of folding and the top of columnar inwall join in the shell, and the bottom of shell directly joins with discoidal base; Position on the base, in the shell is provided with the medium pad; The bottom of inwall and medium pad join; Power transmission shaft passes inwall, shell and base and does not contact with inwall, base, and power transmission shaft overlaps with the axis of inwall, shell.
Operation principle of the present invention is: gap between choke inwall and the power transmission shaft forms the low characteristic impedance section of a quarter-wave, and the inwall of choke and the gap between the shell form quarter-wave characteristic impedance section of growing tall; High characteristic impedance section forms short circuit in the choke cover top portion, and short dot forms electrical short (in fact not contacting) at power transmission shaft with the interface place of guided wave system after two quarter-wave section conversion, suppress microwave leakage.
Compared with prior art, the invention has the beneficial effects as follows: propose choke designs first to mechanical drive shaft; Use the method for two quarter-wave section foldings cleverly, have volume little, in light weight, be easy to machining characteristics; Through optimal design, can obtain broadband character, and can effectively suppress microwave leakage; Contacting mechanically not between the use electrical short technology, power transmission shaft and choke, thereby not friction do not influence mechanically operated efficient; And, avoided tolerance high in the non-choke designs and to the axiality requirement of power transmission shaft, the sparking problem of also having avoided the microwave leakage place to cause; And can use two-stage/multistage cascade as required, further expand bandwidth.Be applicable to the collaborative occasion of using of microwave system and machine driven system.
Above-mentioned inwall, shell, base are processed by metal, and the medium pad is then processed by dielectric.Each part is simple in structure, be easy to processing realizes.
The concrete mode that the bottom of above-mentioned inwall and medium pad join is: the inboard of medium pad upper surface has the bottom location notch, and the bottom of inwall is entrenched on this bottom location notch.
The concrete mode that the top of the inside top of folding and columnar inwall joins in the above-mentioned shell is: the lower surface inboard, top of shell has the top location notch, and the top of inwall is entrenched on this top location notch.
Bottom location notch and top location notch make the easy to connect easy of inwall and shell, and can guarantee that the gap between inwall and shell and power transmission shaft is accurate, so that accurately form a quarter-wave characteristic impedance section.
The top of folding is identical with the boundary shape of guided wave system in the above-mentioned shell.Be convenient to the microwave coupled transfer of choke and guided wave system like this, and do not influence the mode profile in the guided wave system;
Below in conjunction with accompanying drawing and concrete execution mode, the present invention is done further detailed explanation.
Description of drawings
Fig. 1 is the sectional structure sketch map of the embodiment of the invention.
Fig. 2 is the sectional structure sketch map that the embodiment of the invention is used for the radial transmission line feed system of a mechanical phased-array antenna.
Embodiment
Embodiment
Fig. 1 illustrates; A kind of specific embodiment of the present invention does; A kind of small sized wide-band choke that is used for the guided wave system power transmission shaft; It consists of: the top 2a upper surface of folding is fixed on the guided wave system of band power transmission shaft 5 in the columnar shell 2, and the inboard top with columnar inwall 1 of the top 2a of folding joins in the shell 2, and the bottom of shell 2 directly joins with discoidal base 3; Position on the base 3, in the shell 2 is provided with medium pad 4; The bottom of inwall 1 and medium pad 4 join; Power transmission shaft 5 passes inwall 1, shell 2 and base 3 and does not contact with inwall 1, base 3, and power transmission shaft 5 overlaps with the axis of inwall 1, shell 2.
This routine inwall 1, shell 2, base 3 are processed by metal, and 4 on medium pad is processed by dielectric.The dielectric material can be selected intensity good insulation material for use, like organic glass, engineering plastics.
The concrete mode that the bottom of this routine inwall 1 and medium pad 4 join is: the inboard of medium pad 4 upper surfaces has bottom location notch 4a, and the bottom of inwall 1 is entrenched on the location notch 4a of this bottom.
The concrete mode that the top 2a of folding top inboard and columnar inwall 1 joins in this routine shell 2 is: the 2a lower surface inboard, top of shell 2 has top location notch 2c, and the top of inwall 1 is entrenched on the location notch 2c of this top.
The top 2a of folding is identical with the boundary shape of guided wave system in this routine shell 2.
Fig. 2 is used to have the sketch map of radial transmission line feed system (guided wave system) of a mechanical phased-array antenna of power transmission shaft for this example, only represent the structure of one of them coupling outlet among the figure; Microwave transmits in radial transmission line feed system (guided wave system) 6, and this feed system 6 is made up of top board 6a and base plate 6b; The outer wall 7a that is passed feed system 6 and output coaxial 7 by the power transmission shaft 5 of driven by motor constitutes the coupling outlet, thus coupling outlet output microwave; In the junction of power transmission shaft 5, put choke, and the top 2a of the shell 2 of choke is fixed on the base plate 6b, thereby choke and feed system 6 are interfixed with feed system base plate 6b.
When microwave operational frequencies is 4GHz, specifically being of a size of of present embodiment: power transmission shaft 5 diameter 5mm, choke inwall 1 hollow cylinder interior diameter 6mm, overall diameter 9mm, high 10.5mm; Cylinder interior diameter 6mm, overall diameter 16mm, the high 2mm of choke shell top 2a, the dark 0.5mm of detent 2c; The cylinder interior diameter 12mm of choke side wall of outer shell 2b, overall diameter 16mm, high 12mm; The cylinder interior diameter of choke base plate 3 is 6mm, overall diameter 16mm, high 2mm; Medium pad 4 hollow cylinder interior diameter 6mm, overall diameter 12mm, high 2.5mm, the dark 0.5mm of detent 4a.
The numerical simulation structure shows: present embodiment in the frequency band range of radial transmission line feed system needs (3.81-4.46GHz) leakage loss less than-30dB; Therefore the field intensity of the concentrated field intensity that choke itself causes in the radial transmission line feed system do not influence the power capacity of whole feed system.This this choke of explanation has the ability of good inhibition microwave leakage in 15.9% relative bandwidth.According to actual needs, can come the further frequency bandwidth characteristics of expansion choke through the external diameter of increase choke or in methods such as the inner filling of choke media.
Claims (5)
1. small sized wide-band choke that is used for the guided wave system power transmission shaft; It consists of: top (2a) upper surface of folding is fixed on the guided wave system of band power transmission shaft (5) in the columnar shell (2); Inboard top with columnar inwall (1), the top (2a) of folding joins in the shell (2), and the bottom of shell (2) directly joins with discoidal base (3); The position that base (3) is gone up, shell (2) is interior is provided with medium pad (4); The bottom of inwall (1) and medium pad (4) join; Power transmission shaft (5) passes inwall (1), shell (2) and base (3) and does not contact with inwall (1), base (3) and shell (2), and power transmission shaft (5) overlaps with the axis of inwall (1), shell (2).
2. a kind of small sized wide-band choke that is used for the guided wave system power transmission shaft according to claim 1 is characterized in that: described inwall (1), shell (2), base (3) are processed by metal, and medium pad (4) is then processed by dielectric.
3. a kind of small sized wide-band choke that is used for the guided wave system power transmission shaft according to claim 1; It is characterized in that; The concrete mode that the bottom of described inwall (1) and medium pad (4) join is: the inboard of medium pad (4) upper surface has bottom location notch (4a), and the bottom of inwall (1) is entrenched on this bottom location notch (4a).
4. a kind of small sized wide-band choke that is used for the guided wave system power transmission shaft according to claim 1; It is characterized in that; The concrete mode that top inboard and columnar inwall (1), the top (2a) of folding joins in the described shell (2) is: the lower surface inboard, top (2a) of shell (2) has top location notch (2c), and the top of inwall 1 is entrenched on this top location notch (2c).
5. a kind of small sized wide-band choke that is used for the guided wave system power transmission shaft according to claim 1 is characterized in that: the top (2a) of folding is identical with the boundary shape of guided wave system in the described shell (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102528779A CN101702456B (en) | 2009-11-30 | 2009-11-30 | Minitype broadband throttling device used for transmission shaft in guided wave system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102528779A CN101702456B (en) | 2009-11-30 | 2009-11-30 | Minitype broadband throttling device used for transmission shaft in guided wave system |
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| Publication Number | Publication Date |
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| CN101702456A CN101702456A (en) | 2010-05-05 |
| CN101702456B true CN101702456B (en) | 2012-11-07 |
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| CN2009102528779A Expired - Fee Related CN101702456B (en) | 2009-11-30 | 2009-11-30 | Minitype broadband throttling device used for transmission shaft in guided wave system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104619059B (en) * | 2014-12-19 | 2016-04-13 | 西南交通大学 | Magnetron cathode cable microwave leakage protector |
| CN105489989B (en) * | 2015-12-24 | 2018-06-26 | 中国电子科技集团公司第五十四研究所 | A kind of large power waveguide electrically tunable filter |
| CN105811051B (en) * | 2016-05-25 | 2019-04-05 | 西南交通大学 | A kind of microminiature choke for transmission shaft in waveguide |
| 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 |
| CN110665617A (en) * | 2019-11-07 | 2020-01-10 | 西安建筑科技大学 | Microwave-assisted coarse aggregate recovery production line equipment and method thereof |
| CN114421103B (en) * | 2021-11-01 | 2023-03-28 | 成都利尼科医学技术发展有限公司 | Non-contact airtight high-power coaxial waveguide rotary joint |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845327A (en) * | 1988-11-15 | 1989-07-04 | Hitachi Heating Appliances Co., Ltd. | Microwave oven having automatic bread making function |
| CN101414699A (en) * | 2008-12-01 | 2009-04-22 | 中国航天科技集团公司第五研究院第五〇四研究所 | Novel microwave rotary joint |
| CN101485038A (en) * | 2006-06-30 | 2009-07-15 | 哈里斯施特拉特克斯网络运行公司 | Waveguide interface |
-
2009
- 2009-11-30 CN CN2009102528779A patent/CN101702456B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845327A (en) * | 1988-11-15 | 1989-07-04 | Hitachi Heating Appliances Co., Ltd. | Microwave oven having automatic bread making function |
| CN101485038A (en) * | 2006-06-30 | 2009-07-15 | 哈里斯施特拉特克斯网络运行公司 | Waveguide interface |
| CN101414699A (en) * | 2008-12-01 | 2009-04-22 | 中国航天科技集团公司第五研究院第五〇四研究所 | Novel microwave rotary joint |
Non-Patent Citations (1)
| Title |
|---|
| JP平1-204387A 1989.08.16 |
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Granted publication date: 20121107 Termination date: 20211130 |