CN102163528B - Multi-beam coupled cavity traveling-wave tube slow-wave structure and manufacturing method thereof - Google Patents
Multi-beam coupled cavity traveling-wave tube slow-wave structure and manufacturing method thereof Download PDFInfo
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- CN102163528B CN102163528B CN201110056745.6A CN201110056745A CN102163528B CN 102163528 B CN102163528 B CN 102163528B CN 201110056745 A CN201110056745 A CN 201110056745A CN 102163528 B CN102163528 B CN 102163528B
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Abstract
The invention discloses a slow wave structure of a traveling wave tube with multiple coupled cavities and a manufacturing method thereof; the slow wave structure of the multi-beam coupled cavity traveling-wave tube is formed by a coupled cavity chain connected by a pole shoe and a copper ring; the pole shoes and the copper rings are alternately arranged, and coupling grooves which are staggered with each other by 180 degrees are arranged on the pole shoes and the copper rings; the pole piece thickness d1 is greater than the copper ring thickness d 2; the manufacturing method of the slow wave structure of the coupled cavity traveling wave tube comprises two steps. The thicknesses d1 and d2 of the pole shoe and the copper ring are changed, so that the pole shoe can conduct a larger magnetic field value without the phenomenon of magnetic field saturation; the method is simple and feasible to operate, and can effectively improve the electron beam passing rate and the working stability of the high-power multi-beam coupled cavity traveling-wave tube.
Description
Technical field
The present invention relates to the microwave vacuum field of electronic devices, be specifically related to a kind of high-frequency slow wave structures of coupled-cavity TWT and preparation method thereof of annotating more, relate in particular to high-frequency slow wave structures of coupled-cavity TWT for high-power multi-beam traveling wave and preparation method thereof.
Background technology
Travelling wave tube is as the vacuum microwave power amplifying device, has bandwidth, gain is large, efficient is high, high reliability, has a wide range of applications in all kinds of military microwave transmitters, is described as " heart " of weaponry.
Travelling wave tube can be divided into helix TWT, coupled-cavity TWT, annotate coupled-cavity TWT etc. more according to its slow wave structure.Because the heat dispersion of many notes high-frequency slow wave structures of coupled-cavity TWTs is fine, can bear sizable power, therefore the coupled-cavity TWTs of annotating generally for powerful travelling wave tube more.
But in the real work of many notes coupled-cavity TWTs, increase along with the travelling wave tube power output, its needed focusing magnetic field also requires larger, the pole shoe that in travelling wave tube, soft iron is made at this moment thereby the saturated electron beam that causes in magnetic field may occur and defocus, affect the percent of pass of electron beam, finally may make travelling wave tube scrap.
Traditional high-power many notes Coupled-Cavity Slow Waves as shown in Figure 1, slow wave structure is connected and composed by pole shoe 1 and copper ring 2, and wherein pole shoe 1 by soft iron material, is generally electrical pure iron DT8 and makes, copper ring 2 is made by oxygen-free copper TU1 material, all has coupling slot on pole shoe 1 and copper ring 2.Pole shoe 1 and copper ring 2 alternative arrangements, the mode by Welding forms the cavity chain, and the cavity chain intercouples by the coupling slot that is located on pole shoe 1 and copper ring 2, consists of coupled cavity chain.These coupled cavity chains are connected with input/output unit, then at the coupled cavity chain medium position, absorber are set, and just consist of the coupling cavity slow wave system.
In order to obtain higher coupling impedance, the thickness d of traditional high-power Coupled-Cavity Slow Wave pole shoe of many notes
1Thickness d with copper ring
2Equate; The thickness d 3 of pole shoe 1 loading head equates with the thickness d 4 of copper ring 2 loading heads; Magnet steel is arranged on copper ring 2, and the internal diameter of magnet steel is identical with the external diameter of copper ring 2, and the 2 both sides whiles of magnet steel closely cooperate with two pole shoes 1.Along with improving constantly of travelling wave tube power output, the requirement of the value of needed focusing magnetic field is also improved constantly, can be up to 3000Gs～5000Gs, even higher.Because the magnetic permeability of the soft iron material of making pole shoe 1 is limited, along with improving constantly of magnetic field value, will inevitably cause occurring in pole shoe 1 the saturated phenomenon in magnetic field.In case it is saturated that magnetic field appears in pole shoe 1, the distribution of the magnetic line of force will change, and causes occurring on the axle at electron beam place and the inconsistent radial field of the electron beam direction of motion and circumferential field, and these magnetic fields all are harmful to the focusing of electron beam, can be referred to as transverse field.In case occur larger transverse field on the axle of electron beam, the flow rate of electron beam will be very poor, cause the permanent magnet focusing system operational failures of annotating coupled-cavity TWT more, finally make travelling wave tube scrap.
Summary of the invention
The object of the present invention is to provide good many notes high-frequency slow wave structures of coupled-cavity TWT of a kind of electron beam flow rate and preparation method thereof, reduce annotate high power travelling wave tubes because pole shoe magnetic field to occur saturated and cause electron beam to defocus the damage that travelling wave tube is caused; Further aim of the present invention is for the coupling impedance that can guarantee travelling wave tube electron beam and microwave signal and reach itself dispersion characteristics and do not change.
To achieve these goals, the technical solution used in the present invention is:
The described this high-frequency slow wave structures of coupled-cavity TWTs of annotating more, the coupled cavity chain that is connected with copper ring by pole shoe consists of; Described pole shoe and copper ring alternative arrangement, being provided with on described pole shoe and copper ring staggers mutually is the coupling slot of 180 ° of arrangements; The thickness d 1 of described pole shoe is greater than the thickness d 2 of described copper ring.
As further improvement, described pole shoe thickness d1 is 0.4～0.5 times of traveling wave tube slow-wave system period L; Described copper ring thickness d 2 is 0.2～0.3 times of traveling wave tube slow-wave system period L.
As further improvement, the coupling slot angle of described pole shoe is greater than the coupling slot angle of described copper ring.
As further improvement, the loading head thickness d 3 of described pole shoe is greater than the loading head thickness d 4 of described copper ring.
As further improvement, d3: d4=d1: d2.
The described manufacture method of annotating high-frequency slow wave structures of coupled-cavity TWT comprises the following steps more;
(1) make pole shoe and copper ring, make pole shoe thickness d1 greater than copper ring thickness d 2;
(2) pole shoe and the copper ring alternative arrangement that (1) are made are located at coupling slot on pole shoe and copper ring and mutually stagger and be 180 ° of arrangements, and the mode by Welding connects into coupled cavity chain with described pole shoe and copper ring.
As further improvement, the described manufacture methods of annotating high-frequency slow wave structures of coupled-cavity TWT comprise the following steps more;
(1) make pole shoe and copper ring, make pole shoe thickness d1 greater than copper ring thickness d 2; Described pole shoe thickness d1 is 0.4～0.5 times of traveling wave tube slow-wave system period L; Described copper ring thickness d 2 is 0.2～0.3 times of traveling wave tube slow-wave system period L;
(2) pole shoe in described (2) and the coupling slot of copper ring are processed, made the coupling slot angle of pole shoe greater than the coupling slot angle of described copper ring; Further determine the concrete angle of the coupling slot of pole shoe and copper ring, make the working band of travelling wave tube not be offset;
(3) loading head of pole shoe and copper ring in described (1) is processed, made the loading head thickness d 3 of pole shoe equate with the thickness d 1 of pole shoe and copper ring and the ratio of d2 with the ratio of the loading head thickness d 4 of copper ring;
(4) with the pole shoe and the copper ring alternative arrangement that make in described (3), the coupling slot on pole shoe and copper ring mutually staggers and is 180 ° of arrangements, and the mode by Welding connects into coupled cavity chain with described pole shoe and copper ring.
The invention has the advantages that: described high-frequency slow wave structures of coupled-cavity TWTs and preparation method thereof of annotating more, by changing pole shoe and copper ring thickness d 1 and d2, make pole shoe can conduct larger magnetic field value and the saturated phenomenon in magnetic field does not occur, by changing thickness d 3 and the d4 of coupling slot angle and pole shoe and copper ring loading head, guaranteed that again coupling impedance and dispersion characteristics do not change simultaneously.Operation is simple and feasible in the present invention, can effectively improve high-power Beam transmission and the job stability of annotating coupled-cavity TWT more.
Description of drawings
The below is briefly described the content of each width accompanying drawing expression of specification of the present invention and the mark in figure:
Fig. 1 is the described high-frequency slow wave structures of coupled-cavity TWT schematic diagrames of annotating of background technology part more;
Fig. 2 is the structural representation of annotating high-frequency slow wave structures of coupled-cavity TWT of the present invention more;
Fig. 3 is described dispersion map when annotating high-frequency slow wave structures of coupled-cavity TWT pole shoe and copper ring thickness d 1 and d2 and equating more;
Dispersion map when Fig. 4 is described many notes high-frequency slow wave structures of coupled-cavity TWT pole shoe thickness d1 increases;
Dispersion map when Fig. 5 described many notes high-frequency slow wave structures of coupled-cavity TWT pole shoe thickness d1 increase and copper ring thickness d 2 reduce;
Mark in above-mentioned figure is:
1, pole shoe, 2, copper ring.
Embodiment
The below contrasts accompanying drawing, by the description to embodiment, effect and operation principle, manufacturing process and operation using method etc. to the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, each several part and annexation, each several part, be described in further detail, to help those skilled in the art, design of the present invention, technical scheme had more complete, accurate and deep understanding.
As shown in Figure 2, the described high-frequency slow wave structures of coupled-cavity TWTs of annotating more, the coupled cavity chain that connects of being connected with copper ring by pole shoe 1 consists of; Described pole shoe 1 and copper ring 2 alternative arrangements, being provided with on described pole shoe 1 and copper ring 2 staggers mutually is the coupling slot of 180 ° of arrangements; The thickness d 1 of described pole shoe 1 is greater than the thickness d 2 of described copper ring 2.
Described pole shoe 1 thickness d 1 is 0.4～0.5 times of traveling wave tube slow-wave system period L; Described copper ring 2 thickness d 2 are 0.2～0.3 times of traveling wave tube slow-wave system period L.
Designing the thickness d 1 of described pole shoe 1 greater than the thickness d 2 of described copper ring 2, is exactly in fact the thickness thickening with pole shoe 1, with the reduced thickness of copper ring 2.After the enlarged in thickness of pole shoe 1, pole shoe 1 just can the more magnetic line of force of conducting and the magnetic field saturated phenomenon is not occured, but iff the thickness thickening with pole shoe 1, the electric capacity in the coupling slot on thicker pole shoe 1 will become large, just mean that also the energy storage in electric capacity becomes large, because total energy fixes, so the energy storage in the modulation gap of coupling cavity electron beam must reduce, this has just directly caused reducing of coupling impedance, as shown in Figure 4.Therefore in thickness d 1 thickening with pole shoe 1, the thickness d 2 of copper ring 2 is reduced; Electric capacity in coupling slot on pole shoe 13 strengthens like this, and energy storage increases; And the electric capacity in the coupling slot 3 on copper ring 2 reduces, and energy storage reduces; Total effect is that the energy storage in the modulation gap of electron beam is substantially constant, and coupling impedance is also substantially constant, as shown in Figure 5.
The coupling slot angle of described pole shoe 1 is greater than the coupling slot angle of described copper ring 2.
In thickness d 1 thickening with pole shoe 1, when the thickness d 2 of copper ring 2 is reduced, if the angle of the coupling slot on pole shoe 1 and copper ring 2 still is consistent, can cause the changes of annotating the dispersion of high-frequency slow wave structures of coupled-cavity TWT more, finally cause the working band of travelling wave tube to be offset; For the working band that makes travelling wave tube is not offset, the angle of the coupling slot on the pole shoe 1 of enlarged in thickness need to be strengthened, and the angle of the coupling slot on the copper ring 2 that thickness is reduced reduces.Total effect is to make the dispersion characteristics of many notes high-frequency slow wave structures of coupled-cavity TWT shown in Figure 2 and the described dispersion characteristics of annotating high-frequency slow wave structures of coupled-cavity TWT of Fig. 1 substantially be consistent more.
The loading head thickness d 3 of described pole shoe 1 is greater than the loading head thickness d 4 of described copper ring 2.
Constant for the dispersion that keeps described many notes high-frequency slow wave structures of coupled-cavity TWTs, the angle of the coupling slot on pole shoe 1 strengthens, and will inevitably the distribution of the magnetic field magnetic line on pole shoe 1 be exerted an influence, and has brought again to a certain extent harmful transverse magnetic field.The transverse magnetic field that produces in order to prevent therefore need to strengthen the thickness d 3 of the loading head of pole shoe 1, makes simultaneously the thickness d 4 of the loading head of copper ring 2 reduce, and makes d3: d4=d1: d2.
The described manufacture method of annotating high-frequency slow wave structures of coupled-cavity TWT comprises following examples more.
Embodiment one
The described manufacture method of annotating high-frequency slow wave structures of coupled-cavity TWT comprises the following steps more;
(1) make pole shoe and copper ring, make pole shoe thickness d1 greater than copper ring thickness d 2;
(2) pole shoe and the copper ring alternative arrangement that (1) are made are located at coupling slot on pole shoe and copper ring and mutually stagger and be 180 ° of arrangements, and the mode by Welding connects into the coupled cavity chains of annotating with described pole shoe and copper ring more.
Embodiment two
The described manufacture method of annotating high-frequency slow wave structures of coupled-cavity TWT comprises the following steps more;
(1) make pole shoe and copper ring, make pole shoe thickness d1 greater than copper ring thickness d 2; Described pole shoe thickness d1 is 0.4 times of traveling wave tube slow-wave system period L, and d1 is 1.2mm; Described copper ring thickness d 2 is 0.3 times of traveling wave tube slow-wave system period L, and d2 is 0.9mm;
(2) pole shoe in described (2) and the coupling slot of copper ring are processed, made the coupling slot angle of pole shoe greater than the coupling slot angle of described copper ring; Coupling slot angle on described pole shoe is 56 °, and the coupling slot angle on described copper ring is 52.2 °, makes the working band of travelling wave tube not be offset;
(3) loading head of pole shoe and copper ring in described (1) is processed, made the loading head thickness d 3 of pole shoe equate with the thickness d 1 of pole shoe and copper ring and the ratio of d2 with the ratio of the loading head thickness d 4 of copper ring;
(4) with the pole shoe and the copper ring alternative arrangement that make in described (3), the coupling slot on pole shoe and copper ring mutually staggers and is 180 ° of arrangements, and the mode by Welding connects into coupled cavity chain with described pole shoe and copper ring.
By many notes high-frequency slow wave structures of coupled-cavity TWT that embodiment two makes, its electron beam flow rate is 84%, and the efficient of travelling wave tube has reached 20.5%.
Embodiment three
The described manufacture method of annotating high-frequency slow wave structures of coupled-cavity TWT comprises the following steps more;
(1) make pole shoe and copper ring, make pole shoe thickness d1 greater than copper ring thickness d 2; Described pole shoe thickness d1 is 0.5 times of traveling wave tube slow-wave system period L, and d1 is 1.5mm; Described copper ring thickness d 2 is 0.2 times of traveling wave tube slow-wave system period L, and d2 is 0.6mm;
(2) pole shoe in described (2) and the coupling slot of copper ring are processed, made the coupling slot angle of pole shoe greater than the coupling slot angle of described copper ring; Coupling slot angle on described pole shoe is 58 °, and the coupling slot angle on described copper ring is 50 °, makes the working band of travelling wave tube not be offset;
(3) loading head of pole shoe and copper ring in described (1) is processed, made the loading head thickness d 3 of pole shoe equate with the thickness d 1 of pole shoe and copper ring and the ratio of d2 with the ratio of the loading head thickness d 4 of copper ring;
(4) with the pole shoe and the copper ring alternative arrangement that make in described (3), the coupling slot on pole shoe and copper ring mutually staggers and is 180 ° of arrangements, and the mode by Welding connects into coupled cavity chain with described pole shoe and copper ring.
By many notes high-frequency slow wave structures of coupled-cavity TWT that embodiment three makes, its electron beam flow rate is 92%, and the efficient of travelling wave tube has reached 21%.
Embodiment four
The described manufacture method of annotating high-frequency slow wave structures of coupled-cavity TWT comprises the following steps more;
(1) make pole shoe and copper ring, make pole shoe thickness d1 greater than copper ring thickness d 2; Described pole shoe thickness d1 is 0.45 times of traveling wave tube slow-wave system period L, and d1 is 1.35mm; Described copper ring thickness d 2 is 0.25 times of traveling wave tube slow-wave system period L, and d2 is 0.75mm;
(2) pole shoe in described (2) and the coupling slot of copper ring are processed, made the coupling slot angle of pole shoe greater than the coupling slot angle of described copper ring; Coupling slot angle on described pole shoe is 56 °, and the coupling slot angle on described copper ring is 50 °, makes the working band of travelling wave tube not be offset;
(3) loading head of pole shoe and copper ring in described (1) is processed, made the loading head thickness d 3 of pole shoe equate with the thickness d 1 of pole shoe and copper ring and the ratio of d2 with the ratio of the loading head thickness d 4 of copper ring;
(4) with the pole shoe and the copper ring alternative arrangement that make in described (3), the coupling slot on pole shoe and copper ring mutually staggers and is 180 ° of arrangements, and the mode by Welding connects into coupled cavity chain with described pole shoe and copper ring.
By many notes high-frequency slow wave structures of coupled-cavity TWT that embodiment four makes, its electron beam flow rate is 95%, and the efficient of travelling wave tube has reached 23%.
Shown in figure three, when the described pole shoe d1 that annotate high-frequency slow wave structures of coupled-cavity TWTs and d2 copper ring consistency of thickness more, its electron beam flow rate is 78%, the efficient of travelling wave tube is 19%, by the high-frequency slow wave structures of coupled-cavity TWT that embodiment one to embodiment four makes, the efficient of its electron beam flow rate and travelling wave tube effectively improves.
The above is exemplarily described the present invention; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (2)
1. annotate high-frequency slow wave structures of coupled-cavity TWT one kind, the coupled cavity chain that is connected with copper ring by pole shoe consists of more; Described pole shoe and copper ring alternative arrangement, being provided with on described pole shoe and copper ring staggers mutually is the coupling slot of 180 ° of arrangements; Described pole shoe thickness d1 is greater than described copper ring thickness d 2; It is characterized in that: described pole shoe thickness d1 is 0.4～0.5 times of traveling wave tube slow-wave system period L; Described copper ring thickness d 2 is 0.2～0.3 times of traveling wave tube slow-wave system period L; The coupling slot angle of described pole shoe is greater than the coupling slot angle of described copper ring; The loading head thickness d 3 of described pole shoe is greater than the loading head thickness d 4 of described copper ring; D3:d4=d1:d2.
2. manufacture methods of annotating high-frequency slow wave structures of coupled-cavity TWT claimed in claim 1, is characterized in that: comprise the following steps more;
(1) make pole shoe and copper ring, make described pole shoe thickness d1 greater than described copper ring thickness d 2; Pole shoe thickness d1 is 0.4～0.5 times of traveling wave tube slow-wave system period L; Copper ring thickness d 2 is 0.2～0.3 times of traveling wave tube slow-wave system period L;
(2) coupling slot of pole shoe and copper ring is processed, made the coupling slot angle of pole shoe greater than the coupling slot angle of described copper ring; Further determine the concrete angle of the coupling slot of pole shoe and copper ring, make the working band of travelling wave tube not be offset;
(3) loading head of pole shoe and copper ring is processed, made the loading head thickness d 3 of pole shoe equate with the thickness d 1 of pole shoe and copper ring and the ratio of d2 with the ratio of the loading head thickness d 4 of copper ring;
(4) with pole shoe and copper ring alternative arrangement, the coupling slot on pole shoe and copper ring mutually staggers and is 180 ° of arrangements, and the mode by Welding connects into coupled cavity chain with pole shoe and copper ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110056745.6A CN102163528B (en) | 2011-03-10 | 2011-03-10 | Multi-beam coupled cavity traveling-wave tube slow-wave structure and manufacturing method thereof |
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| CN201110056745.6A CN102163528B (en) | 2011-03-10 | 2011-03-10 | Multi-beam coupled cavity traveling-wave tube slow-wave structure and manufacturing method thereof |
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| CN102163528B true CN102163528B (en) | 2013-05-15 |
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| CN103035459B (en) * | 2012-12-11 | 2016-01-27 | 安徽华东光电技术研究所 | A kind of travelling wave tube slow wave structure |
| CN103311075B (en) * | 2013-06-21 | 2016-01-27 | 安徽华东光电技术研究所 | Dual-mode traveling wave tube slow wave structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3885192A (en) * | 1973-02-16 | 1975-05-20 | English Electric Valve Co Ltd | Fundamental coupled travelling wave tube having a periodic permanent magnetic focussing structure |
| CN200965860Y (en) * | 2006-09-29 | 2007-10-24 | 安徽华东光电技术研究所 | A coupling cavity multi-beam traveling wave tube slow wave structure |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3885192A (en) * | 1973-02-16 | 1975-05-20 | English Electric Valve Co Ltd | Fundamental coupled travelling wave tube having a periodic permanent magnetic focussing structure |
| CN200965860Y (en) * | 2006-09-29 | 2007-10-24 | 安徽华东光电技术研究所 | A coupling cavity multi-beam traveling wave tube slow wave structure |
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Address after: 241000 No.01 Eshan Road, high tech Development Zone, Yijiang District, Wuhu City, Anhui Province Patentee after: ANHUI HUADONG PHOTOELECTRIC TECHNOLOGY INSTITUTE Co.,Ltd. Address before: 241000 Anhui Province, Wuhu city Yijiang District South high tech Development Zone Technology Park mansion Patentee before: Anhui Huadong Polytechnic Institute |