CN201887011U - Energy coupling device suitable for rectangular staggered double grid slow-wave structure - Google Patents
Energy coupling device suitable for rectangular staggered double grid slow-wave structure Download PDFInfo
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- CN201887011U CN201887011U CN2010206669168U CN201020666916U CN201887011U CN 201887011 U CN201887011 U CN 201887011U CN 2010206669168 U CN2010206669168 U CN 2010206669168U CN 201020666916 U CN201020666916 U CN 201020666916U CN 201887011 U CN201887011 U CN 201887011U
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Abstract
The utility model relates to an energy coupling device suitable for a rectangular staggered double grid slow-wave structure, which belongs to the field of a vacuum electronic technique. One end of the device is connected with a rectangular waveguide, and the other end of the device is connected with the rectangular staggered double grid slow-wave structure; the part connected with the rectangular staggered double grid slow-wave structure consists of two rows of rectangular waveguide structures staggered up and down with gradually changed heights; all the upper row of rectangular grid half-height positions are in an upper datum plane (1); all the lower row of rectangular grid half-height positions are in a lower datum plane (2); the heights of the upper and the lower rows of rectangular grids are gradually reduced to zero from the port connected with the rectangular staggered double grid slow-wave structure; and the maximum height of the rectangular grid does not exceed the height of the rectangular grid of the rectangular staggered double grid slow-wave structure. In the utility model, microwave signal energy is well coupled into the rectangular staggered double grid slow-wave structure, the enlarged microwave signal energy is well extracted from the rectangular staggered double grid slow-wave structure, and simultaneously the device is easily connected with the existing standard waveguide device.
Description
Technical field
The utility model belongs to the vacuum electronic technical field, particularly the input/output structure in the staggered grid travelling wave tube of rectangle.
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.Slow wave structure commonly used has helix, coupling cavity and winding waveguide etc., and being operated in submillimeter, to involve these structure power outputs of terahertz wave band limited, and structure processing is difficulty very.
In order to adapt to the needs of practical application, the ripple travelling wave tube that is operated in millimeter wave, submillimeter wave has become the focus of research.The staggered grid travelling wave tube of rectangle with characteristics such as simple in structure, easy processing is found that to have a decay little, the coupling impedance height, the linearity is good, reflect little grade good operating characteristic and by extensive concern.
Young-Min Shin equals to propose in 2007 the staggered double grid slow wave structure (being illustrated in figure 1 as its vertical semi-section schematic diagram) of a kind of rectangle, is very potential slow wave structure in the grid type travelling wave tube.It is symmetrically distributed up and down along central shaft by the two rows grid structures of periodic arrangement in opposite directions, and then relative displacement half period longitudinally forms staggered double grid, has certain thickness electronics to annotate passage up and down between the grid.The grid of the row up and down height of the staggered double grid slow wave structure of rectangle is H, and width is w, and thickness is a, and the sunk part between grid and the grid is long to be b, and the cycle of grid is a+b, and the electronics notes channel width of arranging up and down between the grid is 2r.Two broadside inwalls that this structure also can be described as be at a rectangular waveguide load measure-alike rectangle grid alternately, form the staggered double grid of rectangle, the twice of height that guarantees grid is simultaneously annotated passage less than the length on Narrow Wall of Waveguide limit to guarantee to arrange up and down the electronics that adequate thickness is arranged between the grid.
About the staggered double grid slow wave structure of rectangle is a hot issue of studying at present, it can cover very wide bandwidth, its input/output structure is that the performance of energy coupling device can greatly influence the performance based on the travelling wave tube of this structure, good again slow wave structure designs bad meeting and causes serious signal reflex, even can not embody the advantage of this travelling wave tube.It has become the bottleneck of a restriction travelling wave tube development to involve terahertz wave band at millimeter.Young-Min Shin etc. have designed supporting input/output unit (its plane graph as shown in Figure 2) subsequently in the staggered double grid slow wave structure of proposition rectangle, but the performance of this input/output unit is not good, seriously limited bandwidth of operation, and a lot of frequencies can not be worked substantially, with CST MWS 2009 emulation, draw its standing-wave ratio as shown in Figure 3, show that this structure can not satisfy the requirement of practicability.
Summary of the invention
In order to realize that the microwave signal energy is coupled into the staggered double grid slow wave structure of rectangle well, the microwave signal energy that will be exaggerated simultaneously extracts from the staggered double grid slow wave structure of rectangle well, the utility model proposes a kind of energy coupler part that is applicable to the staggered double grid slow wave structure of rectangle.
The technical scheme that the utility model adopted is:
A kind of energy coupler part that is applicable to the staggered double grid slow wave structure of rectangle, its vertical semi-section structure as shown in Figure 4, corresponding 2 d plane picture as shown in Figure 5, by carrying out the transition to the other end that is connected with the staggered double grid slow wave structure of rectangle with the link of rectangular waveguide.Wherein the part that is connected with rectangular waveguide is that one section width edge length is that w, narrow edge lengths are the rectangular waveguide of k; The part that is connected with the staggered double grid slow wave structure of rectangle by two rows distribution interlaced with each other, the rectangle grid that highly gradually change are guided wave structure formed constitutes.The definition width edge length is that w, narrow edge lengths are that the rectangular waveguide of k scene (going up the wide face of the waveguide) plane, place that powers on is last datum level 1, and definition width edge length is that w, narrow edge lengths are that electric field face (the wide face of following waveguide) plane, place is time datum level 2 under the rectangular waveguide of k.In the distribution interlaced with each other of described two rows, the rectangle grid that highly gradually change were guided wave structure formed: position of half height of row's rectangle grid was in the datum level 1 on all; Position of all following half height of row's rectangle grid is in the following datum level 2; The port meter of two rows rectangle grid from being connected with the staggered double grid slow wave structure of rectangle, the height of rectangle grid is decreased to zero gradually; The maximum height of rectangle grid is no more than the rectangle grid height of the staggered double grid slow wave structure of rectangle.
Operation principle of the present utility model can be described as:
The energy coupler part that adopts two the utility model to provide links to each other respectively with input, the output of the staggered double grid slow wave structure of rectangle, constitutes the hf channel of rectangle grid travelling wave tube.The effect of energy coupler part is in order to realize the microwave impedance matching between the staggered double grid slow wave structure of standard rectangular waveguide and rectangle, thereby realize that microwave signal energy areflexia ground is from the staggered double grid slow wave structure of standard rectangular waveguide feed-in rectangle, free electron Shu Fasheng in the staggered double grid slow wave structure of the microwave signal of institute's feed-in and rectangle interacts, realize the amplification of microwave signal power, the microwave signal after the amplification again via the energy coupler part areflexia that links to each other with the staggered double grid slow wave structure output of rectangle output to the standard rectangular waveguide.
The beneficial effects of the utility model are:
(1) in working band, two energy coupler parts are connected to head input, the output of the staggered double grid slow wave structure of rectangle, form the slow wave system that has power coupler unit, emulation obtains its standing-wave ratio less than 1.1, as shown in Figure 6, realized that successfully the microwave signal energy is coupled into the staggered double grid slow wave structure of rectangle well and extracts the staggered double grid slow wave structure of rectangle.
(2) this power coupler unit, has pure, the simple in structure easy processing of mode of operation, only design a spot of gradual change grid and just realized the good coupling of energy, and easily with characteristics such as the general transition guide wave device of existing standard is connected, avoided causing the possibility of multimode operation.
(3) design of this power coupler unit is a benchmark highly with the slow wave structure grid half, makes that annotating channel radius at this zone electronics annotates channel radius by the electronics that diminishes gradually greatly up to slow wave structure, helps the circulation that electronics that electron gun sends is annotated like this.
Description of drawings
Fig. 1 is the vertical section schematic diagram of the staggered double grid slow wave structure of rectangle.Wherein row's grid half height position is gone up in 1 expression, and 2 expressions are row's grid half height and position down, and the distance between the straight line 3 and 4 is that electronics is annotated channel thickness 2r, and a represents grid thickness, and b represents the distance between adjacent two grid, and H represents the height of grid, and w represents the broadside size.
Fig. 2 is the two dimensional surface schematic diagram of the power coupler unit of design such as Young-Min Shin.
Fig. 3 is the standing-wave ratio emulation testing curve of slow wave structure that has the power coupler unit of design such as Young-Min Shin.
Fig. 4 is the structural representation of the energy coupler part that is applicable to the staggered double grid slow wave structure of rectangle that provides of the utility model.1 expression rectangular waveguide scene (go up the wide face of the waveguide) plane, place that powers on wherein, electric field face (the wide face of following waveguide) plane, place under the 2 expression rectangular waveguides, the distance between the straight line 3 and 4 is that electronics is annotated channel thickness 2r.
Fig. 5 is the two dimensional surface schematic diagram of the energy coupler part that is applicable to the staggered double grid slow wave structure of rectangle that provides of the utility model.
Fig. 6 is the standing-wave ratio emulation testing curve that has the slow wave system of the energy coupler part that is applicable to the staggered double grid slow wave structure of rectangle that the utility model provides.
Embodiment
A kind of energy coupler part that is applicable to the staggered double grid slow wave structure of rectangle, its vertical semi-section structure as shown in Figure 4, corresponding 2 d plane picture as shown in Figure 5, by carrying out the transition to the other end that is connected with the staggered double grid slow wave structure of rectangle with the link of rectangular waveguide.Wherein the part that is connected with rectangular waveguide is that one section width edge length is that w, narrow edge lengths are the rectangular waveguide of k; The part that is connected with the staggered double grid slow wave structure of rectangle by two rows distribution interlaced with each other, the rectangle grid that highly gradually change are guided wave structure formed constitutes.The definition width edge length is that w, narrow edge lengths are that the rectangular waveguide of k scene (going up the wide face of the waveguide) plane, place that powers on is last datum level 1, and definition width edge length is that w, narrow edge lengths are that electric field face (the wide face of following waveguide) plane, place is time datum level 2 under the rectangular waveguide of k.In the distribution interlaced with each other of described two rows, the rectangle grid that highly gradually change were guided wave structure formed: position of half height of row's rectangle grid was in the datum level 1 on all; Position of all following half height of row's rectangle grid is in the following datum level 2; The port meter of two rows rectangle grid from being connected with the staggered double grid slow wave structure of rectangle, the height of rectangle grid is decreased to zero gradually; The maximum height of rectangle grid is no more than the rectangle grid height of the staggered double grid slow wave structure of rectangle.
In the technique scheme:
The height of described two rows rectangle grid can be linearity, parabolic type, hyperbolic-type or various polynomial curve type rule and reduce, distance between adjacent two grid also can be linearity, parabolic type, hyperbolic-type or various polynomial curve type rule and reduce, the thickness of grid can keep the grid thickness with the staggered double grid slow wave structure of rectangle identical, also can reduce gradually or increase gradually.
Terahertz wave band with 220GHz is an example, provides a kind of specific embodiments.
Keep the width of rectangle grid to be a, the distance between the adjacent rectangle grid is b.
Last row's grid first grid half height h1 that turns left from the right side is 0.45H, and second grid half height h3 is 0.35H, and the height of row's grid is arithmetic progression all on, last on row's grid partly highly h9 be 0.05H; Arrange grid first grid of turning left from the right side down and belong to the extension of the staggered double grid slow wave structure of rectangle, it highly is 0.5H partly, and second grid half height h2 is 0.4H, and the 3rd grid half height h4 is 0.3H, all height of arranging grid down are arithmetic progression, and last grid half height h8 is 0.1H.
Above-mentioned each part dimension of energy coupler part is: the width of grid is the w=0.77 millimeter, thickness a=0.125 millimeter, broadside is the w=0.77 millimeter, and the distance between the adjacent rectangle grid is the b=0.345 millimeter, the narrow limit k=2 (H/2+r)=0.44 of terminal rectangular waveguide millimeter; Each part dimension is in the staggered double grid slow wave structure of rectangle: the grid height is the H=0.29 millimeter, the width of grid is the w=0.77 millimeter, thickness is the a=0.125 millimeter, distance between the adjacent rectangle grid is the b=0.345 millimeter, the monocycle length of grid is the a+b=0.47 millimeter, and it is the 2r=0.15 millimeter that electronics is annotated channel height.
The slow wave system of utilizing 2009 couples of the CST MWS of 3 D electromagnetic simulation software to have the above-mentioned specific embodiments energy coupler of the utility model part is carried out emulation, obtains the standing-wave ratio curve, and simulation result as shown in Figure 6.It has been generally acknowledged that standing-wave ratio just can satisfy the demand of practical application less than 1.2 structure, as can be known from Fig. 6: the slow wave system that has the utility model power coupler unit, in 202～257GHz frequency band, its standing-wave ratio has good microwave transmission characteristic all less than 1.1.
Claims (4)
1. energy coupler part that is applicable to the staggered double grid slow wave structure of rectangle is by carrying out the transition to the other end that is connected with the staggered double grid slow wave structure of rectangle with the link of rectangular waveguide; Wherein the part that is connected with rectangular waveguide is that one section width edge length is that w, narrow edge lengths are the rectangular waveguide of k; The part that is connected with the staggered double grid slow wave structure of rectangle by two rows distribution interlaced with each other, the rectangle grid that highly gradually change are guided wave structure formed constitutes; The definition width edge length is that w, narrow edge lengths are the rectangular waveguide of the k scene that powers on, promptly going up plane, wide place of waveguide is last datum level (1), the definition width edge length is that w, narrow edge lengths are electric field face under the rectangular waveguide of k, promptly descends plane, wide place of waveguide to be datum level (2) down; In the distribution interlaced with each other of described two rows, the rectangle grid that highly gradually change were guided wave structure formed: position of half height of row's rectangle grid was in the datum level (1) on all; Position of all following half height of row's rectangle grid is in the following datum level (2); The port meter of two rows rectangle grid from being connected with the staggered double grid slow wave structure of rectangle, the height of rectangle grid is decreased to zero gradually; The maximum height of rectangle grid is no more than the rectangle grid height of the staggered double grid slow wave structure of rectangle.
2. the energy coupler part that is applicable to staggered double grid slow wave structure according to claim 1 is characterized in that the height of described two rows rectangle grid is linearity, parabolic type, hyperbolic-type or various polynomial curve type rule and reduces.
3. the energy coupler part that is applicable to staggered double grid slow wave structure according to claim 1, it is characterized in that the distance in the described two rows rectangle grid between adjacent two grid is linearity, parabolic type, hyperbolic-type or various polynomial curve type rule and reduces.
4. the energy coupler part that is applicable to staggered double grid slow wave structure according to claim 1 is characterized in that, the thickness of grid keeps grid thickness with the staggered double grid slow wave structure of rectangle identical or reduce gradually or increase gradually in the described two rows rectangle grid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206669168U CN201887011U (en) | 2010-12-19 | 2010-12-19 | Energy coupling device suitable for rectangular staggered double grid slow-wave structure |
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| CN2010206669168U CN201887011U (en) | 2010-12-19 | 2010-12-19 | Energy coupling device suitable for rectangular staggered double grid slow-wave structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064069A (en) * | 2010-12-19 | 2011-05-18 | 电子科技大学 | Energy coupling device suitable for rectangular-crossed double-gate slow-wave structure |
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2010
- 2010-12-19 CN CN2010206669168U patent/CN201887011U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064069A (en) * | 2010-12-19 | 2011-05-18 | 电子科技大学 | Energy coupling device suitable for rectangular-crossed double-gate slow-wave structure |
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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: 20110629 Effective date of abandoning: 20120808 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110629 Effective date of abandoning: 20120808 |