CN102054644A - Fluctuant waveguide slow wave structure - Google Patents
Fluctuant waveguide slow wave structure Download PDFInfo
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- CN102054644A CN102054644A CN 201010585458 CN201010585458A CN102054644A CN 102054644 A CN102054644 A CN 102054644A CN 201010585458 CN201010585458 CN 201010585458 CN 201010585458 A CN201010585458 A CN 201010585458A CN 102054644 A CN102054644 A CN 102054644A
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Abstract
The invention provides a fluctuant waveguide slow wave structure, belonging to the technical field of vacuum electronics. The structure is formed by deforming a conventional rectangular waveguide of which the size of wide edges is a, and the size of narrow edges is b; the E face of the fluctuant waveguide slow wave structure is regularly fluctuant; the H face of the fluctuant waveguide slow wave structure is a plane; crossed contour lines of the E face and the H face are regularly-changed wavy lines; the period length of the regularly-changed wavy lines is p; and the fluctuant height h of the regularly-changed wavy lines is a difference of the size b of the narrow edges for the rectangular waveguide and the height hb of an electron beam channel. The fluctuant waveguide slow wave structure is simple in main structure and easy to process, has the characteristics of low high-frequency loss, small reflection and wide frequency band, is suitable for using banded electron beam to operate, and the like. The fluctuant waveguide slow wave structure is completely applied to travelling wave tubes (TWT) which work in a terahertz wave band, and is a novel slow wave structure with great application potential.
Description
Technical field
The invention belongs to the vacuum electronic technical field, relate to the slow wave structure of the travelling wave tube that is fit to be operated in terahertz wave band.
Background technology
The research of terahertz wave band is the forward position focus of current electromagnetism and optical field.But, make the electromagnetic spectrum exploitation of terahertz wave band be still blank owing to lack suitable Terahertz power source.Vacuum electron device is realizing having very big potentiality on the high-power Terahertz source.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, winding waveguide and rectangle lattice wave to lead etc.
Present terahertz wave band more than 100GHz, winding waveguide and rectangle lattice wave are led the structure into main research.Because operation wavelength is short more, the slow wave structure size is more little, and promptly size is crossed effect altogether, make that the high-frequency loss of these structures when terahertz wave band work is big, reflect strong etc.Also have, there is very big difficulty especially in the processing that the electronics of winding waveguide is annotated passage; The input/output structure that the rectangle lattice wave is led is difficult to design.All difficulties make existing Terahertz power source development cost height, cycle long, also have very big distance from practicability.Therefore, seek the slow wave structure that is fit to be operated in terahertz wave band of function admirable, just seem urgent especially.
Summary of the invention
In order to seek the slow wave structure that is fit to be operated in terahertz wave band of function admirable, the present invention proposes a kind of fluctuating shape waveguide slow wave structure.
The technical solution adopted in the present invention is:
A kind of fluctuating shape waveguide slow wave structure as shown in Figure 1, is of a size of the conventional rectangular waveguide distortion that a, narrow limit be of a size of b by broadside and forms; The E face of described fluctuating shape waveguide slow wave structure (being the electric field face) is periodically wave fluctuating shape, and the H face of described fluctuating shape waveguide slow wave structure (being the magnetic field face) is the plane, and the cross profile line of E face and H face is periodically variable wave; The Cycle Length of described periodically variable wave is p, and the height h that rises and falls is that the narrow limit of rectangular waveguide size b and electronics are annotated channel height h
bPoor.
In the technique scheme, described periodically variable wave is sine curve, cosine curve, triangular waveform curve or semicircular arc curve.
Fluctuating shape waveguide slow wave structure provided by the invention also can be regarded as:
Broadside is of a size of the conventional rectangular waveguide that a, narrow limit are of a size of b, is center line with the axle center of conventional rectangular waveguide, and periodically teetering along E face 1 normal direction forms; Should keep the cross section unanimity during swing.Its wobble wheel profile 2 (being the cross profile line of E face and H face) is periodically variable sine curve, cosine curve, triangular waveform curve or semicircular arc curve; Amplitude of fluctuation h is that the narrow limit of rectangular waveguide size b deducts rectangle electronics notes channel height h
bThe curve period p is a complete cycle length of slow wave structure.
Operation principle of the present invention can be described as:
Ribbon-like electron is annotated from rectangle electronics notes passage and is passed fluctuating shape waveguide slow wave structure, when the phase velocity of the speed of annotating when electronics and certain space harmonics of the high frequency longitudinal electric field component in the fluctuating shape waveguide slow wave structure is synchronous, just interact, the electronics that forms clustering is annotated, thereby realizes the amplification of high-frequency signal power.
The invention has the beneficial effects as follows:
(1) agent structure is very simple, is only formed along E face (electric field face) distortion by conventional rectangular waveguide, no longer needs to process extra electronics and annotates passage, and difficulty of processing is lower.
(2) the slow wave structure longitudinal cross-section is even, and this uniformity makes that the mode of operation of slow wave structure medium-high frequency field is pure, and high-frequency loss is low, reflects little; Simultaneously can make " cold " bandwidth of slow wave structure obtain very big broadening, as shown in Figure 2, " cold " bandwidth is 200GHz.
(3) input/output unit is simple.
(4) be suitable for utilizing the work of ribbon-like electron notes, can improve operating current, increase power output.
Description of drawings
Fig. 1 is the structural representation of fluctuating shape waveguide slow wave structure provided by the invention.
Fig. 2 is the dispersion curve figure of fluctuating shape waveguide slow wave structure provided by the invention.
Embodiment
A kind of fluctuating shape waveguide slow wave structure as shown in Figure 1, is of a size of the conventional rectangular waveguide distortion that a, narrow limit be of a size of b by broadside and forms; The E face of described fluctuating shape waveguide slow wave structure (being the electric field face) is periodically wave fluctuating shape, and the H face of described fluctuating shape waveguide slow wave structure (being the magnetic field face) is the plane, and the cross profile line of E face and H face is periodically variable wave; The Cycle Length of described periodically variable wave is p, and the height h that rises and falls is that the narrow limit of rectangular waveguide size b and electronics are annotated channel height h
bPoor.
In the technique scheme, described periodically variable wave is sine curve, cosine curve, triangular waveform curve or semicircular arc curve.
Be set as follows concrete size: conventional rectangular waveguide broadside a is 770 microns, and narrow limit b is 350 microns, and Cycle Length p is 460 microns, and the height h that rises and falls is 200 microns, and electronics is annotated channel height h
bIt is 150 microns; Obtain a concrete fluctuating shape slow wave structure, utilize 11 pairs of above-mentioned slow wave structures of the Ansoft HFSS of 3 D electromagnetic simulation software to calculate then, obtain dispersion curve, as shown in Figure 2.As can be known from Fig. 2: fluctuating shape waveguide slow wave structure " cold " bandwidth under the said structure dimensional parameters is 200GHz, is suitable for being operated in the travelling wave tube of terahertz wave band fully.
Claims (5)
1. fluctuating shape waveguide slow wave structure is of a size of the conventional rectangular waveguide distortion that a, narrow limit be of a size of b by broadside and forms; The E face of described fluctuating shape waveguide slow wave structure is periodically wave fluctuating shape, and the H face of described fluctuating shape waveguide slow wave structure is the plane, and the cross profile line of E face and H face is periodically variable wave; The Cycle Length of described periodically variable wave is p, and the height h that rises and falls is that the narrow limit of rectangular waveguide size b and electronics are annotated channel height h
bPoor.
2. fluctuating shape waveguide slow wave structure according to claim 1 is characterized in that described periodically variable wave is a sine curve.
3. fluctuating shape waveguide slow wave structure according to claim 1 is characterized in that described periodically variable wave is a cosine curve.
4. fluctuating shape waveguide slow wave structure according to claim 1 is characterized in that described periodically variable wave is the triangular waveform curve.
5. fluctuating shape waveguide slow wave structure according to claim 1 is characterized in that described periodically variable wave is the semicircular arc curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010585458XA CN102054644B (en) | 2010-12-13 | 2010-12-13 | Fluctuant waveguide slow wave structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010585458XA CN102054644B (en) | 2010-12-13 | 2010-12-13 | Fluctuant waveguide slow wave structure |
Publications (2)
| Publication Number | Publication Date |
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| CN102054644A true CN102054644A (en) | 2011-05-11 |
| CN102054644B CN102054644B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010585458XA Expired - Fee Related CN102054644B (en) | 2010-12-13 | 2010-12-13 | Fluctuant waveguide slow wave structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315063A (en) * | 2011-08-10 | 2012-01-11 | 电子科技大学 | Input/output structure of broadband phase shift travelling wave tube |
| CN105513926A (en) * | 2015-12-21 | 2016-04-20 | 电子科技大学 | Ultra-wideband quasi-open slow-wave structure |
| CN110752131A (en) * | 2019-11-12 | 2020-02-04 | 电子科技大学 | Multi-electron-beam-channel slow-wave structure with trigonometric function profile |
| CN116913747A (en) * | 2023-09-13 | 2023-10-20 | 中国民用航空飞行学院 | Oval sine-like waveguide slow wave structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006024314A1 (en) * | 2004-09-01 | 2006-03-09 | Holger Klapproth | Method for the analysis of point mutations |
| CN101364660A (en) * | 2008-09-10 | 2009-02-11 | 中国科学技术大学 | Wideband directional coupler of PI type dielectric wave-guide |
| CN101593929B (en) * | 2009-07-03 | 2010-11-10 | 厦门大学 | Method for preparing hybrid medium of waveguide distributed feedback structure with fluctuant surface |
| CN202111052U (en) * | 2010-12-13 | 2012-01-11 | 电子科技大学 | Fluctuant waveguide slow wave structure |
-
2010
- 2010-12-13 CN CN201010585458XA patent/CN102054644B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006024314A1 (en) * | 2004-09-01 | 2006-03-09 | Holger Klapproth | Method for the analysis of point mutations |
| CN101364660A (en) * | 2008-09-10 | 2009-02-11 | 中国科学技术大学 | Wideband directional coupler of PI type dielectric wave-guide |
| CN101593929B (en) * | 2009-07-03 | 2010-11-10 | 厦门大学 | Method for preparing hybrid medium of waveguide distributed feedback structure with fluctuant surface |
| CN202111052U (en) * | 2010-12-13 | 2012-01-11 | 电子科技大学 | Fluctuant waveguide slow wave structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315063A (en) * | 2011-08-10 | 2012-01-11 | 电子科技大学 | Input/output structure of broadband phase shift travelling wave tube |
| CN102315063B (en) * | 2011-08-10 | 2013-06-12 | 电子科技大学 | Input/output structure of broadband phase shift travelling wave tube |
| CN105513926A (en) * | 2015-12-21 | 2016-04-20 | 电子科技大学 | Ultra-wideband quasi-open slow-wave structure |
| CN105513926B (en) * | 2015-12-21 | 2017-05-24 | 电子科技大学 | Ultra-wideband quasi-open slow-wave structure |
| CN110752131A (en) * | 2019-11-12 | 2020-02-04 | 电子科技大学 | Multi-electron-beam-channel slow-wave structure with trigonometric function profile |
| CN116913747A (en) * | 2023-09-13 | 2023-10-20 | 中国民用航空飞行学院 | Oval sine-like waveguide slow wave structure |
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| CN102054644B (en) | 2012-05-30 |
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