CN201877394U - Circular waveguide slow wave structure of angular loading spiral lines - Google Patents
Circular waveguide slow wave structure of angular loading spiral lines Download PDFInfo
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- CN201877394U CN201877394U CN2010206668358U CN201020666835U CN201877394U CN 201877394 U CN201877394 U CN 201877394U CN 2010206668358 U CN2010206668358 U CN 2010206668358U CN 201020666835 U CN201020666835 U CN 201020666835U CN 201877394 U CN201877394 U CN 201877394U
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- circular waveguide
- slow wave
- helix
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Abstract
The utility model relates to a circular waveguide slow wave structure of angular loading spiral lines, belonging to the technical field of vacuum electron, and comprising a circular waveguide, N identical spiral lines and two ring dielectric pieces, wherein the radius of the circular waveguide is R1; the outer radius of each ring dielectric piece is R1, and the inner radius of each ring dielectric piece is R5; the two ring dielectric pieces are respectively fixed on the two end surfaces of the circular waveguide; the N same spiral lines are respectively connected between the two ring dielectric pieces, so that the N identical spiral lines are angularly and uniformly distributed in the circular waveguide; and hollow parts of the two ring dielectric pieces and space parts surrounded by all the spiral lines form electron beam channels together. The circular waveguide slow wave structure can work at short millimeter wave and terahertz waveband, coupling impedance can be effectively improved, a dispersion curve is smoother, so that a traveling wave tube adopting the novel slow wave structure has higher gain and interaction efficiency, and obtains higher output power; and in addition, in the circular waveguide slow wave structure, the phase speed can be greatly reduced, so that lower working voltage can be adopted, and the circular waveguide slow wave structure is beneficial to miniaturization of devices.
Description
Technical field
The utility model belongs to the vacuum electronic technical field, relates to travelling-wave tube amplifier spare.
Background technology
Travelling wave tube is an of paramount importance class microwave source in the vacuum electronic technical field, have high-power, high efficiency, high-gain, broadband and feature of long life, be widely used in fields such as radar, guidance, satellite communication, microwave remote sensing, radiation measurement, its performance is directly determining the level of equipment.The core component of travelling wave tube is a slow wave structure.
Along with the develop rapidly of modern electronic technology, China's aerospace engineering and satellite active demand of new generation have broadband, high efficiency, in light weight, Millimeter-Wave Source that volume is little in a large number.Yet, rising along with operating frequency, particularly at short millimeter wave band or even terahertz wave band, it is very little that size of devices will become, thereby cause adopting the travelling wave tube of traditional slow wave structure because the restriction of beam current density, heat radiation and processing technology, make the power output of device seriously descend, can't satisfy the requirement of change system power and bandwidth.So the research of carrying out the novel slow wave line travelling wave tube that can be operated in high frequency band has very significant meaning.
Medium loads angle cycle circular waveguide slow wave structure, and as shown in Figure 1, promptly the angle in traditional medium loading circular waveguide structure periodically inserts a series of metal posts, is a kind of simple in structure, the slow wave structure that machining accuracy is high.This structure mainly contains that power capacity is big, processing is than being easier to and the relatively simple advantage of input/output structure.According to external relevant report, this structure becomes a kind of high power radiation source in that millimere-wave band is very potential.
But, because the relative dielectric constant ε of medium
rLimited, its delay ratio can not be very big, according to law of conservation of energy as can be known the operating voltage and the phase velocity of device be directly proportional, so, when phase velocity is excessive, can cause the operating voltage of device excessive, be unfavorable for very much the miniaturization of equipping.In addition, if select the bigger material of dielectric constant, coupling impedance also can seriously descend, thereby causes the power of homogeneous tube and gain to descend.
Summary of the invention
In order to improve the coupling impedance that medium loads angle cycle circular waveguide structure, and reduction operating voltage, thereby make travelling wave tube have higher benefit and gain, the utility model proposes a kind of angle of miniaturization millimeter wave traveling wave tube that is applicable to and load the circular waveguide slow wave structure of helix.
The technical scheme that the utility model adopted is:
A kind of angle loads the circular waveguide slow wave structure of helix, as shown in Figure 2, comprises that a radius is R
1Circular waveguide 4, N identical helix 3 and two outer radius be R
1, inside radius is R
5Annulus dieelctric sheet 1 and 2; Two annulus dieelctric sheets 1 and 2 are individually fixed in two end faces of circular waveguide 4, and N identical helix 3 all is connected between two annulus dieelctric sheets 1 and 2, make N identical helix 3 be the angle shape that evenly distributes in circular waveguide 4 inside.Say that more specifically N identical helix 3 is angle, and to be evenly distributed on circular waveguide 4 inner external diameters be R
2, internal diameter is R
3The annulus cylindrical space in, the angle distance between wherein adjacent two helixes 3
Be 2 π/N, and R
1＜R
2＜R
3＜R
5The hollow parts of two annulus dieelctric sheets and all helixes around space segment form electronics jointly and annotate passage 5.
In the technique scheme, the shape of cross section of described helix 3 can be rounded, circle ring sector, square or various polygonal shape; The material of described annulus dieelctric sheet 1,2 can be aluminium oxide ceramics or boron nitride ceramics.
The angle that the utility model provides loads the circular waveguide slow wave structure of helix and compares with existing medium loading angle cycle circular waveguide slow wave structure, angle loads helix circular waveguide slow wave structure can improve interaction efficiency effectively, reduce operating voltage, help miniaturization of devices; Can make device work in short millimeter wave and terahertz wave band, simultaneously can effectively improve coupling impedance, and dispersion curve is comparatively smooth, makes to adopt the travelling wave tube of this new type slow wave structure to have higher gain and interaction efficiency, and obtains big power output at terahertz wave band; In addition, the utility model can reduce phase velocity greatly, thereby can adopt lower operating voltage, helps miniaturization of devices.
Description of drawings
Fig. 1 is the structural representation that existing medium loads angle cycle circular waveguide slow wave structure.Wherein, the 1st, the round metal waveguide of partially filled medium, the 2nd, the metal column of angle periodic arrangement, the 3rd, electronics is annotated passage.1, the 2nd, a pair of medium circular ring plate, the 3rd, the equally distributed helix of angle, the 4th, the round metal waveguide, the 5th, electronics is annotated passage.
Fig. 2 is the structural representation that the angle that provides of the utility model loads helix circular waveguide structure.
Fig. 3 is the two-dimensional mark figure that the angle that provides of the utility model loads the cross section of helix circular waveguide slow wave structure
Fig. 4 is provided by the dispersion characteristics comparison diagram that the angle that provides loads helix circular waveguide slow wave structure and medium loading angle cycle circular waveguide slow wave structure.
Fig. 5 is provided by the coupling impedance comparison diagram that the angle that provides loads helix circular waveguide slow wave structure and medium loading angle cycle circular waveguide slow wave structure.
In Fig. 4 and Fig. 5: curve 1 and curve 3 are respectively dispersion characteristic curve and the coupling impedance curves that angle loads helix circular waveguide slow wave structure, and curve 2 and curve 4 are respectively dispersion characteristic curve and the coupling impedance curves that medium loads angle cycle circular waveguide slow wave structure.
Embodiment
A kind of angle loads the circular waveguide slow wave structure of helix, as shown in Figure 2, comprises that a radius is R
1Circular waveguide 4, N identical helix 3 and two outer radius be R
1, inside radius is R
5Annulus dieelctric sheet 1 and 2; Two annulus dieelctric sheets 1 and 2 are individually fixed in two end faces of circular waveguide 4, and N identical helix 3 all is connected between two annulus dieelctric sheets 1 and 2, make N identical helix 3 be the angle shape that evenly distributes in circular waveguide 4 inside.Say that more specifically N identical helix 3 is angle, and to be evenly distributed on circular waveguide 4 inner external diameters be R
2, internal diameter is R
3The annulus cylindrical space in, the angle distance between wherein adjacent two helixes 3
Be 2 π/N, and R
1＜R
2＜R
3＜R
5The hollow parts of two annulus dieelctric sheets and all helixes around space segment formed electronics jointly and annotated passage 5.
In the technique scheme, be example with the W wave band, the described angle cycle loads each part dimension of helix circular waveguide structure and is: round metal waveguide 4 radius Rs
1Be 1 millimeter, helix 3 number N are 8, and helix 3 vertical period L are 0.2 millimeter, and helix 3 cross-sectional width d are 0.1 millimeter, helix 3 cross section angles
Be 27 degree, arc radius R on the helix 3
2Be 0.75 millimeter, 3 times arc radius R of helix
3It is 0.65 millimeter.Setting structure size (unit: mm): R
2/ R
1=0.75, (R
2-R
3)/R
1=0.1, L/R
1=0.2,
N=8, R
1=1.Utilize the 3 D electromagnetic simulation software that the angle cycle is loaded helix circular waveguide structure and carry out analogue simulation, obtain its dispersion characteristics and coupling impedance, and associating medium loading angle cycle circular waveguide compares together mutually, simulation result as shown in Figure 5 and Figure 6, we ignore the fixedly medium circular ring plate of helix in the emulation.Wherein, curve 1 and curve 3 are respectively dispersion characteristic curve and the coupling impedance curves that angle loads helix circular waveguide slow wave structure, and curve 2 and curve 4 are respectively dispersion characteristic curve and the coupling impedance curves that medium loads angle cycle circular waveguide slow wave structure.
The comparison of curve 1, curve 2 can obviously be found out from Fig. 5: under the measure-alike situation of two kinds of structures, the working band scope that angle loads helix circular waveguide slow wave structure is far longer than the working band scope that medium loads angle cycle circular waveguide slow wave structure, and phase velocity also loads the phase velocity of angle cycle circular waveguide slow wave structure well below medium, simultaneously, dispersion curve is also more smooth.This just shows that angle loads helix circular waveguide slow wave structure can improve interaction efficiency effectively, reduces operating voltage, helps miniaturization of devices.
Curve 3, curve 4 are more as can be known from Fig. 6: under the measure-alike situation of two kinds of structures, in working frequency range, the coupling impedance that angle loads helix circular waveguide slow wave structure is higher than the coupling impedance that medium loads angle cycle circular waveguide slow wave structure far away.This explanation, the travelling wave tube that adopts angle to load helix circular waveguide slow wave structure can obtain higher gain and mutual effect benefit.
This illustrates that this invention can effectively improve coupling impedance, and it is more smooth that dispersion curve becomes, thereby make the gain of travelling wave tube and efficient be improved; In addition, because the reduction of phase velocity makes the operating voltage of device reduce greatly, help the application in miniaturized device.
Claims (3)
1. the circular waveguide slow wave structure of an angle loading helix comprises that a radius is R
1Circular waveguide (4), N identical helix (3) and two outer radius be R
1, inside radius is R
5Annulus dieelctric sheet (1 and 2); Two annulus dieelctric sheets (1 and 2) are individually fixed in two end faces of circular waveguide (4), N identical helix (3) all is connected between two annulus dieelctric sheets (1 and 2), makes N identical helix (3) be the angle shape that evenly distributes in circular waveguide (4) inside; Say that more specifically N identical helix (3) is angle, and to be evenly distributed on the inner external diameter of circular waveguide (4) be R
2, internal diameter is R
3The annulus cylindrical space in, the angle distance between wherein adjacent two helixes (3)
Be 2 π/N, and R
1＜R
2＜R
3＜R
5The hollow parts of two annulus dieelctric sheets and all helixes around space segment form electronics jointly and annotate passage (5).
2. angle according to claim 1 loads the circular waveguide slow wave structure of helix, it is characterized in that the shape of cross section of described helix (3) is circle, circle ring sector, square or various polygon.
3. angle according to claim 1 loads the circular waveguide slow wave structure of helix, it is characterized in that the material of described annulus dieelctric sheet (1 and 2) is aluminium oxide ceramics or boron nitride ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206668358U CN201877394U (en) | 2010-12-19 | 2010-12-19 | Circular waveguide slow wave structure of angular loading spiral lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206668358U CN201877394U (en) | 2010-12-19 | 2010-12-19 | Circular waveguide slow wave structure of angular loading spiral lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877394U true CN201877394U (en) | 2011-06-22 |
Family
ID=44165305
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206668358U Expired - Lifetime CN201877394U (en) | 2010-12-19 | 2010-12-19 | Circular waveguide slow wave structure of angular loading spiral lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201877394U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074439A (en) * | 2010-12-19 | 2011-05-25 | 电子科技大学 | Circular-waveguide slow-wave structure for angularly loading spiral line |
| CN107093539A (en) * | 2016-12-26 | 2017-08-25 | 中国工程物理研究院应用电子学研究所 | A kind of Terahertz phase velocity gradual change folded waveguide oscillator |
| CN112216580A (en) * | 2020-09-27 | 2021-01-12 | 电子科技大学 | Multi-beam gyrotron traveling wave tube based on tile-shaped waveguide |
-
2010
- 2010-12-19 CN CN2010206668358U patent/CN201877394U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074439A (en) * | 2010-12-19 | 2011-05-25 | 电子科技大学 | Circular-waveguide slow-wave structure for angularly loading spiral line |
| CN102074439B (en) * | 2010-12-19 | 2012-11-07 | 电子科技大学 | Circular-waveguide slow-wave structure for angularly loading spiral line |
| CN107093539A (en) * | 2016-12-26 | 2017-08-25 | 中国工程物理研究院应用电子学研究所 | A kind of Terahertz phase velocity gradual change folded waveguide oscillator |
| CN112216580A (en) * | 2020-09-27 | 2021-01-12 | 电子科技大学 | Multi-beam gyrotron traveling wave tube based on tile-shaped waveguide |
| CN112216580B (en) * | 2020-09-27 | 2021-12-03 | 电子科技大学 | Multi-beam gyrotron traveling wave tube based on tile-shaped waveguide |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110622 Effective date of abandoning: 20130306 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110622 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |