CN104851767B - Curve coupling input and output device of sheet beam device - Google Patents
Curve coupling input and output device of sheet beam device Download PDFInfo
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- CN104851767B CN104851767B CN201510241142.1A CN201510241142A CN104851767B CN 104851767 B CN104851767 B CN 104851767B CN 201510241142 A CN201510241142 A CN 201510241142A CN 104851767 B CN104851767 B CN 104851767B
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Abstract
The present invention provides a curve coupling input and output device of a sheet beam device, belonging to the field of vacuum electronic technology. For the problems of narrow working frequency band, small power capacity, small electron beam passage, complex and loose structure of an input and output coupler used in the prior art, the invention provides an input and output coupling device with H-plane curve coupled waveguide, the curve contour distribution can be linear distribution, chebyshev distribution, trigonometric function distribution, binomial distribution and the like, thus the wide working band, good isolation effect, high power output and wide electron beam passage are realized, and the compact input and output coupling device structure is convenient to process.
Description
Technical field
The invention belongs to vacuum electronics technology field, and in particular to one kind is applied to High-Power Microwave, millimeter wave and terahertz
The hereby input and output coupled structure of the ribbon beam device of wave band.
Background technology
Microwave electronic device is widely used in radar, defends as a kind of particularly important High-Power Microwave, Millimeter-Wave Source
The fields such as star communication, electronic countermeasure, high speed data transfer, defence weapon, heating using microwave.Microwave electron system high sensitivity, height
The long-distance transmissions of reliability and detection, by guide device to high-frequency, broadband, high-power, high efficiency, high reliability and little
The directions such as type are developed.In recent years, the appearance of stripe electron beam, promotes ribbon beam electronic device in microwave to THz wave frequency range
There is tempting development prospect, ribbon-like electron note using having compared with the rectangle or oval cross section of aspect ratio by increasing
Big beam current, improves the power output of homogeneous tube.Meanwhile, ribbon-like electron is noted due to relatively low current density, dropping significantly
The low requirement to focusing magnetic field, can be with by the way of periodic perperiodic permanent magnet focusing, so as to be beneficial to realize the miniaturization of homogeneous tube.Separately
Outward, ribbon beam device is adapted to the slow wave circuit of planar structure, is more beneficial for producing high power at high frequencies.Therefore, accordingly
Power coupler unit includes that input and the design of export structure are also suggested higher requirement, such as high-frequency, broadband, efficient
Rate, easy processing simple and compact for structure.
Additional drive signal is effectively input into tremendously high frequency interaction circuit and by the letter after amplification by input and output coupled structure
Number export to external waveguide, to realize signal transmission, therefore, in addition to guaranteeing there is higher power transmission efficiency, while
Also should ensure that electromagnetic wave is tried one's best few electronics note for being coupled to electron gun and collector region by electron beam channel and then causing
Unstability, is also possible to prevent in addition excessive electromagnetic wave outside and reveals.
Due to the fast development of ribbon beam device, the input/output structure of various structures is suggested.University of Electronic Science and Technology relies
Sword is strong et al. in " W-band 1-Kw Staggered Double-Vane Traveling-Wave Tube " (IEEE
Trans.On Electron Devices, 2012, volume 59,496-503 page, author：Lai Jianqiang, Gong Yubin, Xu Xiong et al.)
A kind of ribbon beam travelling-wave tubes input/output coupler of gradual change ridge waveguide loading is devised in one text；The isolation of this structure compared with
It is good, -20dB is less than in working band, but 1dB transmission bandwidths are not wide, and corresponding relative bandwidth is up to 24.1%, and electronics note is logical
Road is too little, it is difficult to play the advantage of ribbon beam device, and structure is more complicated, is especially applicable to high band, not easy processing.Electronics
University of Science and Technology Zheng Yuan et al. is in " Extremely broad bandwidth input/output coupling structure
design for Q-band sheet-beam traveling-wave tube”(IEEE Trans.Plasma Sci.,2014
Year, volume 42,3339-3343 page, author：Zheng Yuan, Wang Jianxun, Luo Yong) in propose a kind of E faces porous input/output coupler,
The structure isolation bandwidth effect is very good, and relative bandwidth of the isolation less than -20dB is up to 36.4%.But, multiple coupling apertures increase
The length of structure is added, not easy processing test cooling, while waveguide parallel coupling in E faces is unfavorable for and the miniaturization for focusing on permanent magnet
Integrated and encapsulation.
The content of the invention
The present invention is narrower for the input/output coupler working band described in background technology, and power capacity is low, electricity
Son notes the problems such as passage is little, and complex structure is not compact, it is proposed that (outline line distribution includes a kind of H surface curves：Linear distribution,
Chebyshev distributions, trigonometric function distribution and binomial distribution etc.) coupled waveguide input and output coupling device, realize compared with
Wide bandwidth of operation, preferable isolation effect, high-power output, wide electron beam channel, while the compactedness of structure, is highly convenient for
Processing.
The present invention is specifically adopted the following technical scheme that：
The curve coupling input/output unit of ribbon beam device, its structure as shown in Figures 1 to 4, including the main waveguide of rectangle
105th, rectangle complementary wave leads 106 and curve coupled waveguide 107, and the main waveguide 105 and complementary wave lead 106 parallel arrangements and therebetween
Energy is coupled by curve coupled waveguide 107；The main waveguide 105 includes the waveguide port 101 being connected with slow-wave structure and electricity
Sub- rifle or the waveguide port 102 of collector connection, the complementary wave leads 106 includes input or the port 103, the connection load that export
With or direct short-circuit waveguide port 104；The curve coupled waveguide 107 lead parallel to main waveguide 105 and complementary wave 106 H
As shown in Fig. 2 the upper and lower side in section is parallel, the left and right both sides in section are the curve wheel profile in specular for the section in face
108, the curve wheel profile 108 can be in linear distribution, chebyshev distributions, trigonometric function distribution and binomial distribution
One kind；
If the curve coupling input/output unit is noted as the output waveguide of ribbon beam device, electromagnetic wave with electronics
Main waveguide 105 is entered by port 101 through note ripple interaction in slow-wave structure, electromagnetic wave via main waveguide H faces coupling window
Mouth is coupled into the complementary wave parallel with main waveguide H faces and leads in 106 by curve coupled waveguide 107, defeated finally by port 103
Go out, electronics note is then entered by port 102 collects level；If used as the input waveguide of ribbon beam device, electromagnetic wave passes through input
Mouth 103 enters into complementary wave and leads in 106, and by the curve coupled waveguide 107 in H faces main waveguide 105 is coupled into, and electronics is noted then by port
102 enter main waveguide 105, and electronics note and electromagnetic wave enter slow-wave structure, carry out note ripple by main waveguide transmission by port 101
Interaction, realizes the amplification of signal.
Further, the H faces that the H faces of the main waveguide 105 lead 106 with complementary wave be arranged in parallel in opposite directions, the now coupling
The two ends of waveguide 107 are located at main waveguide 105 respectively and complementary wave is led on 106 H faces；Or, E faces and the pair of the main waveguide 105
The E faces of waveguide 106 be arranged in parallel in opposite directions, and now the two ends of the coupled waveguide 107 are located at main waveguide 105 respectively and complementary wave is led
On 106 E faces.
The invention has the beneficial effects as follows：
H surface curve coupled waveguides are present invention employs, bandwidth of operation is expanded to a certain extent, reduced coupler and tie with slow wave
The reflection of structure port, so as to improve the service behaviour of output coupler；Present configuration is simply compact, is conducive to and periodic permanent magnet
Focusing system miniaturization is integrated and encapsulates and can extend along E faces, and applicable band is extensive；The structure handling ease, only need to be from one side
Carry out cutting washing, beneficial to as high-frequency coupler；Planar structure is easy to cooling, with high power capacity；In addition, electron beam channel chi
The very little electron beam channel size equal in high-frequency structure, so as to be beneficial to play the advantage of ribbon-like electron note；Coupled waveguide is improved to
Certain angle of inclination, can correct and match the transmission phase offset caused due to coupled waveguide, improve because high frequency is defeated with input
Go out the reflection caused by waveguide impedance discontinuity between structure, while extending the work band of whole input and output coupling device
It is wide.
Description of the drawings
Fig. 1 is the top view of the curve coupled waveguide input and output coupling device that the present invention is provided；
Fig. 2 is the forward sight section i.e. Section A-A figure of the curve coupled waveguide input and output coupling device that the present invention is provided；
Fig. 3 is the left view of the curve coupled waveguide input and output coupling device that the present invention is provided；
Fig. 4 is the top view cross section i.e. section B-B figure of the curve coupled waveguide input and output coupling device that the present invention is provided；
Fig. 5 is that the top view cross section i.e. B-B of the curve coupled waveguide input and output coupling device that the embodiment of the present invention 2 is provided cuts
Face figure；
Fig. 6 is the reflection when termination matching of input and output coupling device port 104 that the embodiment of the present invention 1 is provided is loaded
(S11), isolation (S21) transmission (S31) coefficient simulation result；
Fig. 7 be the embodiment of the present invention 1 provide input and output coupling device port 104 it is short-circuit when reflection (S11), isolation
(S21) transmission (S31) coefficient simulation result；
Fig. 8 is the reflection for inclining the short circuit of coupled waveguide input and output coupling device port 4 that the embodiment of the present invention 2 is provided
(S11), isolation (S21) transmission (S31) coefficient simulation result.
Specific embodiment
The present invention is described further with reference to embodiment
Embodiment 1
The present embodiment be operated in W frequency ranges (75-110GHz, centre frequency 95GHz) to be applied to ribbon beam travelling-wave tubes defeated
As a example by entering export structure, the present invention is described in more detail.
As shown in Figures 1 to 4, wherein curve is coupled the structural representation of the input and output coupling device that the present embodiment is provided
Waveguide profile 108 is distributed using chebyshev, and the two ends of the coupled waveguide 107 are led respectively positioned at main waveguide 105 and complementary wave
On 106 H faces, the transmission direction of the coupled waveguide 107 is vertical with the H faces of main waveguide 105.
Fig. 6 gives reflection, isolation and the configured transmission that fabric port 4 shown in the present embodiment connects matched load,
It can be seen that port reflection is less than a width of 19.3Hz of band of -15dB, bandwidth of the isolation less than -20dB reaches
19.9GHz, Fig. 7 give reflection parameters, isolation and the configured transmission of the short circuit of port 4；By the parameter of short-circuit structure, can be with
Band a width of 19.3GHz of the exit port reflection less than -15dB is seen, bandwidth of the isolation less than -20dB reaches 21.8GHz, 1dB (S31>-
1dB) transmission bandwidth 23.2GHz.It can be seen that the short circuit of port 4 does not affect on the reflection of port 1, but the impact to the isolation of port 2 is larger, band
Width broadens.
Embodiment 2
Further, by the direction along main waveguide transmission of change coupled waveguide, correction and matching electromagnetic wave are in coupled wave
There is lead and lag phenomenon due to different frequent points phase place in the place of leading, adjusts the transmission direction of the coupled waveguide 107 and main waveguide
Angle, θ between 105 H faces so that θ be less than 90 °, as shown in figure 5, can further expand the coupler bandwidth of operation and
Improve the reflecting properties of low-frequency band.
The transmission direction of the coupled waveguide 107 of the chebyshev distributions of the present embodiment is hung down relative to the H faces of main waveguide 105
Line direction has certain gradient, as shown in figure 5, other structures structure is identical with embodiment 1.Fig. 8 gives this reality
Apply coupled waveguide input and output coupling device port reflection parameters (S of the example using inclined chebshev distributions11), configured transmission
(S21) and isolation performance (S31) result.As can be seen that the inclination angle by changing optimization coupled waveguide, thus it is possible to vary phase place is passed
It is defeated, so the reflection of reduction coupler, transmission and reflecting properties are improved, its bandwidth extends 7GHz to low frequency operation region respectively
And 9GHz.
Above example is only of the invention for convenience of description, present invention may apply to multiple frequency bands of microwave to submillimeter wave,
Travelling-wave tubes, backward wave tube and klystron including X, Ku, Ka, Q, W, D and G frequency range.
Claims (3)
1. a kind of curve of ribbon beam device couples input/output unit, including the main waveguide of rectangle (105), rectangle complementary wave are led
(106) and curve coupled waveguide (107), the main waveguide (105) leads (106) parallel arrangement and therebetween by song with complementary wave
Line coupled waveguide (107) couples energy；The main waveguide (105) includes the waveguide port (101) being connected with slow-wave structure and electricity
Sub- rifle or the waveguide port (102) of collector connection, the complementary wave leads (106) including input or the port (103) for exporting, connection
Load matched or the waveguide port of direct short-circuit (104), it is characterised in that for the curve coupled waveguide (107), its is parallel
Parallel in the upper and lower side in the section in main waveguide (105) H faces, the left and right both sides in the section are the curved profile in specular
Line (108), the H faces that (106) are led in the H faces of the main waveguide (105) with complementary wave be arranged in parallel in opposite directions, now the coupled waveguide
(107) two ends are located at main waveguide (105) respectively and complementary wave is led on the H faces of (106).
2. the curve of ribbon beam device according to claim 1 couples input/output unit, it is characterised in that the curve
Outline line (108) is chebyshev distributions.
3. the curve of ribbon beam device according to claim 1 couples input/output unit, it is characterised in that the curve
Outline line (108) is linear distribution, trigonometric function distribution or binomial distribution in one kind.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510241142.1A CN104851767B (en) | 2015-05-13 | 2015-05-13 | Curve coupling input and output device of sheet beam device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510241142.1A CN104851767B (en) | 2015-05-13 | 2015-05-13 | Curve coupling input and output device of sheet beam device |
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| CN104851767A CN104851767A (en) | 2015-08-19 |
| CN104851767B true CN104851767B (en) | 2017-05-10 |
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| CN111293396A (en) * | 2020-03-25 | 2020-06-16 | 深圳大学 | Coupler for ribbon beam device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3535659A (en) * | 1968-03-11 | 1970-10-20 | Edward Salzberg | Waveguide hybrid junctions |
| US3758879A (en) * | 1971-08-31 | 1973-09-11 | Int Standard Electric Corp | Variable directional coupler |
| US4210880A (en) * | 1977-10-07 | 1980-07-01 | Compagnie Industrielle Des Telecommunications Cit-Alcatel | Multiple branch-line wave guide coupler |
| CN103066367A (en) * | 2012-09-12 | 2013-04-24 | 电子科技大学 | Integrated Waveguide Directional Coupler |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53113454A (en) * | 1977-03-14 | 1978-10-03 | Nec Corp | Directional coupler of waveguide type |
| JPS5542434A (en) * | 1978-09-20 | 1980-03-25 | Mitsubishi Electric Corp | Waveguide-type coupler |
-
2015
- 2015-05-13 CN CN201510241142.1A patent/CN104851767B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3535659A (en) * | 1968-03-11 | 1970-10-20 | Edward Salzberg | Waveguide hybrid junctions |
| US3758879A (en) * | 1971-08-31 | 1973-09-11 | Int Standard Electric Corp | Variable directional coupler |
| US4210880A (en) * | 1977-10-07 | 1980-07-01 | Compagnie Industrielle Des Telecommunications Cit-Alcatel | Multiple branch-line wave guide coupler |
| CN103066367A (en) * | 2012-09-12 | 2013-04-24 | 电子科技大学 | Integrated Waveguide Directional Coupler |
Non-Patent Citations (1)
| Title |
|---|
| Extremely Broad Bandwidth Input/Output Coupling Structure Design for a Q-Band Sheet-Beam Traveling-Wave Tube;Yuan Zheng等;《IEEE TRANSACTIONS ON PLASMA SCIENCE》;20141031;第42卷(第10期);正文第3339页右栏最后一段至第3340页左栏最后一段，图1 * |
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