CN102306599A - Curved ridge-loading rectangular slot waveguide slow wave line - Google Patents
Curved ridge-loading rectangular slot waveguide slow wave line Download PDFInfo
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- CN102306599A CN102306599A CN201110229523A CN201110229523A CN102306599A CN 102306599 A CN102306599 A CN 102306599A CN 201110229523 A CN201110229523 A CN 201110229523A CN 201110229523 A CN201110229523 A CN 201110229523A CN 102306599 A CN102306599 A CN 102306599A
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Abstract
The invention discloses a curved ridge-loading rectangular slot waveguide slow wave line, which belongs to the field of microwave vacuum electronic devices. The slow wave line comprises two parallel metal plates, wherein an upper metal plate and a lower metal plate are supported and fixed together through a side wall; the two metal plates are provided with curved slots; the shapes of sections of the curved slots are the same as those of half sections formed after the section of a rectangular single-ridge waveguide or a rectangular double-ridge waveguide is sectioned along the central line of a wide edge of the waveguide; each curved slot is formed by connecting a series of curved slot parts with straight slot parts side by side alternately; and the curved slots of the upper metal plate and the lower metal plate are formed in a mirror symmetry mode relative to a central plane between the upper metal plate and the lower metal plate. The curved ridge-loading rectangular slot waveguide slow wave line provided by the invention has the advantages of curved slot waveguide slow wave lines and ridge waveguides, so that the slow wave line has higher power capacity and a wider operating bandwidth; and the slow wave line has the wider operating bandwidth and higher coupling resistance under the same size compared with the conventional curved slot waveguide slow wave line, so that the increase of the bandwidth of a travelling wave tube and the improvement on gains and efficiency are facilitated.
Description
Technical field
The invention belongs to the microwave vacuum technical field of electronic devices, be specifically related to notes-Bo mutual effect device---the slow wave line of travelling wave tube.
Background technology
Travelling wave tube has outstanding application status in various fields such as dual-use radar, communication, electronic countermeasuress, and slow wave structure (slow wave line) then is in the travelling wave tube performance to be played material critical component.At present there is serious contradiction in travelling wave tube on power output and bandwidth of operation, and helix and be out of shape one type of slow wave line travelling wave tube and have very wide bandwidth is less relatively but power output is limited by radiating condition; And coupling cavity, ladder track class slow wave line travelling wave tube be owing to be all-metal construction, and more than the high one magnitude of the general comparable helix class travelling wave tube of power capacity, but its relative bandwidth has only about 10%, and is narrow more than helix.Therefore searching had both had big power capacity, and having the novel slow wave line wideer than coupled cavity slow wave line bandwidth again becomes the direction that the various countries scholar makes great efforts.
The rectangular channel waveguide; Can regard as by rectangular waveguide and cut open along broadside (E face) the center plane of symmetry; Respectively get its half lead the groove on the upper and lower metallic plate as slot wave shape on upper and lower metallic plate, slotting respectively, and upper and lower metallic plate kept at a certain distance away and form.The electronics that the rectangular channel waveguide forms owing to the interval between the upper and lower metallic plate is annotated passage and is allowed through large scale electronics notes; Comprise the ribbon-like electron notes; Make the travelling wave tube operating current significantly increase, the travelling wave tube power capacity of therefore making with it is big, and bandwidth of operation is wideer than coupled-cavity TWT; Rectangular channel waveguide has simultaneously overcome the deficiency of normal rectangular waveguide aspect size and loss, has that size is big, loss is little, advantages such as single mode operation wide frequency range, thereby be particularly suitable in millimeter wave, the application of submillimeter wave wave band.
With rectangular channel waveguide crossheading vertically carry out periodicity bending back and forth, just form tortuous rectangle channel waveguide slow-wave line, as shown in Figure 1, it has the above-mentioned advantage that slot wave is led equally; Because the notes-Bo mutual effect passage of tortuous rectangle channel waveguide slow-wave line is processed to meander-shaped, make same performance require following slow wave line overall volume to dwindle greatly simultaneously.
Even if comparing normal rectangular waveguide slow wave line, tortuous rectangular waveguide slow wave line or even rectangle channel waveguide slow-wave line, tortuous rectangle channel waveguide slow-wave line all has advantage; But further improve in signal frequency; Especially after getting into submillimeter wave or even terahertz wave band, tortuous rectangle channel waveguide slow-wave line still faces the limit challenge of aspects such as device size, machining accuracy.Therefore, under existing tortuous rectangle channel waveguide slow-wave line device size condition, how further to improve the bandwidth of operation of travelling wave tube, how further to improve the gain and the efficient of travelling wave tube, becoming has technical problem to be solved.
Summary of the invention
The present invention provides a kind of complications to add ridge rectangle channel waveguide slow-wave line; Under identical size condition, compare existing curved channel waveguide slow-wave line and have wideer bandwidth of operation, higher coupling impedance, thereby more help the raising of increase, gain and the efficient of travelling wave tube bandwidth.
Technical scheme of the present invention is following:
Complications add ridge rectangle channel waveguide slow-wave line, like Fig. 2, shown in 3, comprise the last metallic plate that is parallel to each other 3 and following metallic plate 4, and sidewall 7 supports through being positioned at the long limit of upper and lower metallic plate marginal position between the upper and lower metallic plate also are fixed together.All has tortuous groove on said two metallic plates; The cross sectional shape of said tortuous groove and half section shape after the cross section of rectangle single ridged waveguides or rectangle double ridged waveguide is cut open along waveguide broadside (E face) center line (respectively like Fig. 3, shown in 4) are identical; Said tortuous groove alternately is formed by connecting from beginning to end set of flex slot part (among Fig. 2 among mark 5 or Fig. 3 shown in the mark 8) and straight trough part (among Fig. 2 and Fig. 3 shown in the mark 6), and the tortuous groove of upper and lower metallic plate is the minute surface symmetry with respect to the central plane between the upper and lower metallic plate.
In the technique scheme, the curved slot of said tortuous groove part can be U-shaped curved slot (among Fig. 2 shown in the mark 5) or quarter bend crank slot (among Fig. 3 shown in the mark 8); Said sidewall 7 materials are metal material, insulating material or microwave absorbing material.
Complications provided by the invention add ridge rectangle channel waveguide slow-wave line; Be equivalent in the tortuous rectangular channel of existing tortuous rectangle channel waveguide slow-wave line, form along waveguide broadside (E face) loading rectangle list ridge or two ridge; Also be equivalent to rectangle single ridged waveguides or double ridged waveguide are cut open along waveguide broadside (E face) the center plane of symmetry; Respectively get its half lead the groove on the upper and lower metallic plate as slot wave shape constitute that single ridged waveguides shape slot wave is led or double ridged waveguide shape slot wave is led; Vertically ridge waveguide shape slot wave being led of crossheading carried out periodicity bending back and forth then, adds ridge rectangle channel waveguide slow-wave line thereby form complications.
Itself have between upper and lower metallic plate 3 and 4 at interval because slot wave is led, the electronics that forms nature is annotated passage, so complications add ridge rectangle channel waveguide slow-wave line and need not to process specially electronics again and annotate passage.
The rectangular ridge waveguide have than normal rectangular waveguide wide the operating frequency range of Duoing.The operating frequency range of common standard rectangular waveguide has only 1.5: 1 (ratio of maximum operating frequency and lowest operating frequency); And the rectangular ridge waveguide; No matter be rectangle single ridged waveguides or rectangle double ridged waveguide, operating frequency range can reach 3.6: 1, is more than a times of normal rectangular waveguide.On the other hand, because the existence of ridge waveguide median ridge makes the basic mode electric field in the waveguide obtain compression in the ridge position; Electric field is more concentrated; Electric field strength is strengthened greatly, therefore, passes through in the center of ridge if let electronics annotate; Electronics is annotated and a more strong interaction is taken place, this just means and has improved coupling impedance.Therefore; The present invention adds the ridge rectangle with the cross sectional shape of the tortuous groove of tortuous rectangular channel waveguide by rectangle instead, and the bandwidth of operation of slow wave line is further widened, and coupling impedance is significantly improved; Thereby more help the increase of travelling wave tube bandwidth, the raising of gain and efficient.
Complications provided by the invention add ridge rectangle channel waveguide slow-wave line and had both had the superiority of curved channel waveguide slow-wave line; The advantage that has ridge waveguide again; Therefore, be that a kind of power capacity is bigger, the novel slow wave line that bandwidth of operation is wideer; Under identical size condition, compare existing curved channel waveguide slow-wave line and have wideer bandwidth of operation, higher coupling impedance, thereby more help the raising of increase, gain and the efficient of travelling wave tube bandwidth.The present invention can overcome the contradiction between travelling wave tube power and the bandwidth to a certain extent, is particularly suitable in higher frequency wave band (submillimeter region or even terahertz wave band) travelling wave tube, using.
Description of drawings
Fig. 1 is tortuous rectangle channel waveguide slow-wave line structural representation.
Fig. 2 is that complications provided by the invention add one of ridge rectangle channel waveguide slow-wave line structural representation.
Fig. 3 be complications provided by the invention add ridge rectangle channel waveguide slow-wave line structural representation two.
Fig. 4 is a rectangle single ridged waveguides schematic cross-section.
Fig. 5 is a rectangle double ridged waveguide schematic cross-section.
Fig. 6 is a metal plate structure sketch map in the tortuous rectangle channel waveguide slow-wave line of actual processing, and another metallic plate and it is symmetry fully.
Among Fig. 1 to Fig. 6, the 3rd, last metallic plate, the 4th, following metallic plate, the 5th, U-shaped curved slot, the 6th, the straight trough part of tortuous groove, the 7th, sidewall, the 8th, quarter bend crank slot.
Embodiment
Complications add ridge rectangle channel waveguide slow-wave line, like Fig. 2, shown in 3, comprise the last metallic plate that is parallel to each other 3 and following metallic plate 4, and sidewall 7 supports through being positioned at the long limit of upper and lower metallic plate marginal position between the upper and lower metallic plate also are fixed together.All has tortuous groove on said two metallic plates; The cross sectional shape of said tortuous groove and half section shape after the cross section of rectangle single ridged waveguides or rectangle double ridged waveguide is cut open along waveguide broadside (E face) center line (respectively like Fig. 3, shown in 4) are identical; Said tortuous groove alternately is formed by connecting from beginning to end set of flex slot part (among Fig. 2 among mark 5 or Fig. 3 shown in the mark 8) and straight trough part (among Fig. 2 and Fig. 3 shown in the mark 6), and the tortuous groove of upper and lower metallic plate is the minute surface symmetry with respect to the central plane between the upper and lower metallic plate.
Fig. 6 has provided a metal plate structure sketch map in a kind of actual tortuous rectangle channel waveguide slow-wave line of processing; This figure is depicted as down metallic plate 4 structures; Last metallic plate and it is symmetry fully, and two metallic plates in opposite directions altogether and add upper side wall 7 and add ridge rectangle channel waveguide slow-wave line with regard to constituting complete complications; Wherein the curved slot of tortuous groove partly is the U-shaped curved slot.Actually add man-hour, groove digs out on the certain thickness metallic plate having, so good integrity, and heat radiation is strong, and enough intensity is arranged again.Support and fix the sidewall 7 employing beryllium oxide ceramics or the beryllium oxide attenuation ceramics of upper and lower metallic plate, weld together with upper and lower metallic plate.
Claims (4)
1. complications add ridge rectangle channel waveguide slow-wave line, comprise the last metallic plate (3) and the following metallic plate (4) that are parallel to each other, support through the sidewall (7) that is positioned at the long limit of upper and lower metallic plate marginal position between the upper and lower metallic plate and are fixed together; It is characterized in that; All has tortuous groove on said two metallic plates; The cross sectional shape of said tortuous groove is identical with half section shape after the cross section of rectangle single ridged waveguides or rectangle double ridged waveguide is cut open along waveguide broadside center line; Said tortuous groove partly alternately is formed by connecting from beginning to end set of flex slot part and straight trough, and the tortuous groove of upper and lower metallic plate is the minute surface symmetry with respect to the central plane between the upper and lower metallic plate.
2. complications according to claim 1 add ridge rectangle channel waveguide slow-wave line, it is characterized in that, the curved slot of said tortuous groove partly is a U-shaped curved slot (5).
3. complications according to claim 1 add ridge rectangle channel waveguide slow-wave line, it is characterized in that, the curved slot of said tortuous groove partly is a quarter bend crank slot (8).
4. add ridge rectangle channel waveguide slow-wave line according to claim 1,2 or 3 described complications, it is characterized in that, said sidewall (7) material is metal material, insulating material or microwave absorbing material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110229523A CN102306599A (en) | 2011-08-11 | 2011-08-11 | Curved ridge-loading rectangular slot waveguide slow wave line |
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| CN201110229523A CN102306599A (en) | 2011-08-11 | 2011-08-11 | Curved ridge-loading rectangular slot waveguide slow wave line |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354199A (en) * | 2013-07-01 | 2013-10-16 | 电子科技大学 | Ridge-added microstrip line plane slow wave structure |
| CN108335959A (en) * | 2018-03-09 | 2018-07-27 | 电子科技大学 | A kind of angle logarithm folding groove waveguides slow-wave structure |
| CN113381153A (en) * | 2021-06-23 | 2021-09-10 | 天津大学 | Slow-wave slot line transmission line |
| CN114899066A (en) * | 2022-05-19 | 2022-08-12 | 电子科技大学 | Four-ribbon slow wave structure with trapezoidal lines and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572205A (en) * | 2009-06-10 | 2009-11-04 | 电子科技大学 | Zigzag slow-wave line of double ridged waveguide |
| CN101673866A (en) * | 2009-07-22 | 2010-03-17 | 电子科技大学 | Curved channel waveguide slow-wave line |
-
2011
- 2011-08-11 CN CN201110229523A patent/CN102306599A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572205A (en) * | 2009-06-10 | 2009-11-04 | 电子科技大学 | Zigzag slow-wave line of double ridged waveguide |
| CN101673866A (en) * | 2009-07-22 | 2010-03-17 | 电子科技大学 | Curved channel waveguide slow-wave line |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354199A (en) * | 2013-07-01 | 2013-10-16 | 电子科技大学 | Ridge-added microstrip line plane slow wave structure |
| CN103354199B (en) * | 2013-07-01 | 2016-01-13 | 电子科技大学 | One adds ridge microstrip line plane slow wave structure |
| CN108335959A (en) * | 2018-03-09 | 2018-07-27 | 电子科技大学 | A kind of angle logarithm folding groove waveguides slow-wave structure |
| CN113381153A (en) * | 2021-06-23 | 2021-09-10 | 天津大学 | Slow-wave slot line transmission line |
| CN113381153B (en) * | 2021-06-23 | 2022-04-05 | 天津大学 | Slow-wave slot line transmission line |
| CN114899066A (en) * | 2022-05-19 | 2022-08-12 | 电子科技大学 | Four-ribbon slow wave structure with trapezoidal lines and application thereof |
| CN114899066B (en) * | 2022-05-19 | 2023-04-07 | 电子科技大学 | Four-ribbon slow wave structure with trapezoidal lines and application thereof |
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Application publication date: 20120104 |