CN102377000A - High-frequency conversion structure with rectangular-circular mode - Google Patents
High-frequency conversion structure with rectangular-circular mode Download PDFInfo
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- CN102377000A CN102377000A CN2010102515004A CN201010251500A CN102377000A CN 102377000 A CN102377000 A CN 102377000A CN 2010102515004 A CN2010102515004 A CN 2010102515004A CN 201010251500 A CN201010251500 A CN 201010251500A CN 102377000 A CN102377000 A CN 102377000A
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Abstract
The invention discloses a high-frequency conversion structure with a rectangular-circular mode, relating to microwave technology. In the high-frequency conversion structure, a rectangular waveguide is orthogonally connected with a circular waveguide; one end of the circular waveguide is connected with a circular waveguide drift section which is closed aiming to a TE11 mode in an operating mode, and the other end of the circular waveguide is sequentially connected with a first tapering circular waveguide, an elliptical waveguide, a second tapering circular waveguide and an output circular waveguide; and the output circular waveguide is used for outputting waves in a TE11 circularly-polarized mode. The invention provides a novel method for converting rectangular waveguides from a TE10 linearly-polarized mode to an operating-mode TE11 circularly-polarized mode, therefore, the input coupling problem of a gyrotron amplifier is solved.
Description
Technical field
The invention belongs to microwave technical field, it is applied to the high power millimeter wave gyrotron amplifier, is the high-frequency structure that a kind of novel rectangular waveguide linear polarization pattern arrives circular waveguide circular polarization mode switch.
Background technology
Gyrotron amplifier has high power, high-gain and wide band characteristics in millimere-wave band; Be with a wide range of applications and development potentiality at aspects such as radar imagery, electronic countermeasures, anti-stealthy target acquisitions, be the coherent source that receives much attention in the high-power microwave source.Gyrotron amplifier is that the microwave signal of input is amplified, and this just needs wide band input coupled structure, and input signal is input to the interaction circuit of gyrotron amplifier, accomplishes the conversion of input pattern to mode of operation.Therefore broadband input coupled structure is the important component part of gyrotron amplifier, and the quality of its input pattern structure directly affects the amplification performance of gyrotron amplifier.
The usual method that produces TE11 circular polarization pattern is to be that 90 ° linear polarization signal incides the circular waveguide from two vertical direction respectively simultaneously with pairs such as two and phase difference.The main difficulty of this method is exactly in certain bandwidth range, along with two signals of change of frequency are difficult for keeping equal and opposite in direction and phase difference keeps 90 °.
Summary of the invention
The objective of the invention is to disclose a kind of square circular pattern conversion high-frequency structure, the conversion method of a kind of linear polarization pattern TE10 mould of novel rectangular waveguide to mode of operation TE11 circular polarization pattern is provided, to solve the input coupled problem of gyrotron amplifier.
For achieving the above object, technical solution of the present invention is:
A kind of square circular pattern conversion high-frequency structure; Its rectangular waveguide is connected with the circular waveguide quadrature; Circular waveguide one end connects the circular waveguide drift section that ends for mode of operation TE11 mould; Circular waveguide other end order is connected with the first gradual change circular waveguide, elliptic waveguide, the second gradual change circular waveguide, output circular waveguide, output circular waveguide output TE11 circular polarization mode wave.
Described square circular pattern conversion high-frequency structure, the radius of its said circular waveguide, output circular waveguide is 2.72mm, length is 7.2mm; The first gradual change circular waveguide length is 5mm; The elliptic waveguide major semiaxis is 2.71mm, and semi-minor axis is 2.66mm, and length is 6mm; The second gradual change circular waveguide length is 10mm.
Described square circular pattern conversion high-frequency structure, its said circular waveguide drift section is electron beam channel.
Described square circular pattern conversion high-frequency structure, it connects vacuum-tight window on rectangular waveguide.
Described square circular pattern conversion high-frequency structure, the rectangular waveguide TE10 pattern of its input is coupled in the circular waveguide through off-gauge rectangular waveguide, accomplishes the conversion of rectangular waveguide TE10 pattern to the linear polarization pattern TE11 mould of circular waveguide; The TE11 pattern of linear polarization is decomposed into equal and opposite in direction during through the elliptic waveguide section; And with the ellipse long and short shaft is two polarized waves of direction; Because the difference of its longitudinal propagation constant causes two phase differences between the polarized wave also can increase along with the increase of oval segment length, reach 90 ° through its phase difference after the certain transmission length of elliptic waveguide; Form circularly polarised wave, finally realize of the conversion of linear polarization TE10 pattern to circular polarization TE11 mould.
Described square circular pattern conversion high-frequency structure, the transmission length that its said elliptic waveguide is certain is to calculate with the theoretical approximate formula of following formula:
Its transmission length
wherein r is the circular waveguide radius, and Δ r is the poor of oval major semiaxis and semi-minor axis.
But high-frequency structure passing ratio reduced scale of the present invention changes waveguide dimensions realizes the conversion of rectangular waveguide TE10 pattern to mode of operation TE11 circular polarization mould at ku, ka and W wave band, has the advantages that working band is wide, loss is little, mode distortion is little, simple and compact for structure.This high-frequency structure can effectively solve the energy input problem of gyrotron amplifier in broadband.
This mode switch structure not only can be used on the input coupling system of millimeter wave gyrotron amplifier; And can be used as the export structure of gyrotron device; Realize the output of linear polarization mould side, also can be used on the transmission systems such as microwave plasma pulse compression, antenna.
Description of drawings
Fig. 1 is a kind of square circular pattern conversion high-frequency structure of the present invention, has provided the high-frequency structure schematic diagram of the TE10 pattern of rectangular waveguide to mode of operation TE11 circular polarization mode switch; Among the figure:
Rectangular waveguide 1; Circular waveguide 2; Gradual change circular waveguide 3, elliptic waveguide 4; Gradual change circular waveguide 5; Circular waveguide 6; Drift section 7.
Fig. 2 is the transformation relation figure of the transmission coefficient of structure of the present invention with frequency;
Fig. 3 is the variation relation figure of the standing-wave ratio of structure of the present invention with frequency.
Embodiment
See Fig. 1, be a kind of square circular pattern conversion high-frequency structure of the present invention, specifically; Rectangular waveguide 1 is connected with circular waveguide 2 quadratures; Circular waveguide 2 is connected with tapered waveguide 3, and circular waveguide 2 one ends connect the circular waveguide drift section 7 that ends for mode of operation TE11 mould, and drift section 7 also is an electron beam channel.Gradual change circular waveguide 3 is connected with elliptic waveguide 4, and elliptic waveguide 4 is connected with tapered waveguide 5, and tapered waveguide 5 is connected with circular waveguide 6.Wherein, the radius of circular waveguide 2 is 2.72mm, and length is 7.2mm, and tapered waveguide 3 length are 5mm, and tapered waveguide 5 length are 10mm, and the elliptic waveguide major semiaxis is 2.71mm, and semi-minor axis is 2.66mm.
One linear polarization signal directly is fed into the circular waveguide from rectangular waveguide, is the TE11 pattern of circular polarization through the elliptic waveguide section with the TE11 mode switch of linear polarization.Its high-frequency structure mainly is made up of rectangular waveguide, elliptic waveguide transforming section, drift section three parts.The rectangular waveguide TE10 pattern of input is coupled in the circular waveguide through off-gauge rectangular waveguide, accomplishes the conversion of rectangular waveguide TE10 pattern to the linear polarization pattern TE11 mould of circular waveguide; The TE11 pattern of linear polarization is decomposed into equal and opposite in direction during through the elliptic waveguide section; And with the ellipse long and short shaft is two polarized waves of direction; Because the difference of its longitudinal propagation constant causes two phase differences between the polarized wave also can increase along with the increase of oval segment length, reach 90 ° through its phase difference after the certain transmission length of elliptic waveguide; Form circularly polarised wave, finally realize of the conversion of linear polarization TE10 pattern to circular polarization TE11 mould.
The transmission length that above-mentioned elliptic waveguide is certain is with computes:
Its transmission length
wherein r is the circular waveguide radius, and Δ r is the poor of oval major semiaxis and semi-minor axis.
High-frequency structure of the present invention adopts off-gauge rectangular waveguide to be input in the circular waveguide from the side; Utilize rectangular waveguide TE10 mode excitation to play circular waveguide linear polarization pattern TE11 mould, the TE11 mould of linear polarization has encouraged the TE11 pattern of circular polarization through the elliptic waveguide transforming section.Rectangular waveguide is non-standard waveguide, and its size can be adjusted, and to realize the impedance matching between rectangular waveguide and the circular waveguide, reduces reflection.If the sealing needs are arranged, can on rectangular waveguide, connect vacuum-tight window.Hermetyic window not only can play the sealing function of vacuum, can also regulate impedance matching, plays the frequency band effect of broadening mode converter.
The transmission coefficient that referring to Fig. 2, Fig. 3 is structure of the present invention is with the transformation relation figure of frequency and the standing-wave ratio variation relation figure with frequency.
Claims (6)
1. a square circular pattern is changed high-frequency structure; It is characterized in that; Rectangular waveguide is connected with the circular waveguide quadrature; Circular waveguide one end connects the circular waveguide drift section that ends for mode of operation TE11 mould, and circular waveguide other end order is connected with the first gradual change circular waveguide, elliptic waveguide, the second gradual change circular waveguide, output circular waveguide, output circular waveguide output TE11 circular polarization mode wave.
2. square circular pattern conversion high-frequency structure as claimed in claim 1 is characterized in that the radius of said circular waveguide, output circular waveguide is 2.72mm, and length is 7.2mm; The first gradual change circular waveguide length is 5mm; The elliptic waveguide major semiaxis is 2.71mm, and semi-minor axis is 2.66mm, and length is 6mm; The second gradual change circular waveguide length is 10mm.
3. square circular pattern conversion high-frequency structure as claimed in claim 1 is characterized in that said circular waveguide drift section is electron beam channel.
4. square circular pattern conversion high-frequency structure as claimed in claim 1 is characterized in that, on rectangular waveguide, connects vacuum-tight window.
5. square circular pattern conversion high-frequency structure as claimed in claim 1; It is characterized in that; The rectangular waveguide TE10 pattern of input is coupled in the circular waveguide through off-gauge rectangular waveguide, accomplishes the conversion of rectangular waveguide TE10 pattern to the linear polarization pattern TE11 mould of circular waveguide; The TE11 pattern of linear polarization is decomposed into equal and opposite in direction during through the elliptic waveguide section; And with the ellipse long and short shaft is two polarized waves of direction; Because the difference of its longitudinal propagation constant causes two phase differences between the polarized wave also can increase along with the increase of oval segment length, reach 90 ° through its phase difference after the certain transmission length of elliptic waveguide; Form circularly polarised wave, finally realize of the conversion of linear polarization TE10 pattern to circular polarization TE11 mould.
6. square circular pattern conversion high-frequency structure as claimed in claim 1 is characterized in that, the transmission length that said elliptic waveguide is certain is to calculate with the theoretical approximate formula of following formula:
Its transmission length
wherein r is the circular waveguide radius, and Δ r is the poor of oval major semiaxis and semi-minor axis.
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| CN2010102515004A CN102377000A (en) | 2010-08-11 | 2010-08-11 | High-frequency conversion structure with rectangular-circular mode |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623773A (en) * | 2012-04-24 | 2012-08-01 | 江苏贝孚德通讯科技股份有限公司 | Microwave orthogonal-mode converter |
| CN103730737A (en) * | 2014-01-16 | 2014-04-16 | 中国人民解放军国防科学技术大学 | Wedge-shaped gradual change waveguide cavity circular polarizer compact in structure |
| CN104134834A (en) * | 2014-07-31 | 2014-11-05 | 中国科学院电子学研究所 | Waveguide mode exciting device |
| CN105932373A (en) * | 2016-05-25 | 2016-09-07 | 电子科技大学 | High-power overmode microwave elbow with controllable polarization |
| CN106653523A (en) * | 2016-12-16 | 2017-05-10 | 电子科技大学 | Output device of TE1,1 mode gyro traveling wave tube |
| CN106941061A (en) * | 2017-04-25 | 2017-07-11 | 电子科技大学 | Compact type broadband TEn0‑HE0nMode conversion device |
| CN107634296A (en) * | 2017-09-01 | 2018-01-26 | 西北核技术研究所 | High-Power Microwave TE11Mould polarized rotation synthesizer and polarized rotation synthetic method |
| CN108243550A (en) * | 2016-12-23 | 2018-07-03 | 韩国基础科学支援研究院 | Linear electromagnetic wave plasma source and use its plasma processing apparatus |
| WO2018120737A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳超级数据链技术有限公司 | Feed structure of slab waveguide antenna |
| CN109887819A (en) * | 2019-01-10 | 2019-06-14 | 北京大学 | A kind of Terahertz gyrotron side corner mould backward wave interaction circuit and its control method |
| CN112886159A (en) * | 2021-01-13 | 2021-06-01 | 上海科技大学 | Broadband silicon-based metal waveguide rectangular-circular mode converter |
| CN113764242A (en) * | 2021-07-30 | 2021-12-07 | 中国工程物理研究院应用电子学研究所 | Conformal input coupling miniaturized relativistic klystron amplifier |
| CN116247394A (en) * | 2023-01-06 | 2023-06-09 | 中国人民解放军63660部队 | Rectangular waveguide TE 10 Circular waveguide polarization tunable TE 11 Mode converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4200820A (en) * | 1978-06-30 | 1980-04-29 | Varian Associates, Inc. | High power electron beam gyro device |
| US5059928A (en) * | 1988-01-13 | 1991-10-22 | Thomson Csf | Mode transformer for microwave energy transmission circuit |
| CN1574195A (en) * | 2003-06-02 | 2005-02-02 | 泰源电气产业株式会社 | Non-rotating electrodeless discharge lamp system using circularly polarized microwaves |
-
2010
- 2010-08-11 CN CN2010102515004A patent/CN102377000A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200820A (en) * | 1978-06-30 | 1980-04-29 | Varian Associates, Inc. | High power electron beam gyro device |
| US5059928A (en) * | 1988-01-13 | 1991-10-22 | Thomson Csf | Mode transformer for microwave energy transmission circuit |
| CN1574195A (en) * | 2003-06-02 | 2005-02-02 | 泰源电气产业株式会社 | Non-rotating electrodeless discharge lamp system using circularly polarized microwaves |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623773A (en) * | 2012-04-24 | 2012-08-01 | 江苏贝孚德通讯科技股份有限公司 | Microwave orthogonal-mode converter |
| CN103730737A (en) * | 2014-01-16 | 2014-04-16 | 中国人民解放军国防科学技术大学 | Wedge-shaped gradual change waveguide cavity circular polarizer compact in structure |
| CN103730737B (en) * | 2014-01-16 | 2016-01-13 | 中国人民解放军国防科学技术大学 | A kind of wedge shape gradual change waveguide cavity circular polarizer of compact conformation |
| CN104134834A (en) * | 2014-07-31 | 2014-11-05 | 中国科学院电子学研究所 | Waveguide mode exciting device |
| CN105932373A (en) * | 2016-05-25 | 2016-09-07 | 电子科技大学 | High-power overmode microwave elbow with controllable polarization |
| CN106653523A (en) * | 2016-12-16 | 2017-05-10 | 电子科技大学 | Output device of TE1,1 mode gyro traveling wave tube |
| CN106653523B (en) * | 2016-12-16 | 2018-08-21 | 电子科技大学 | A kind of TE1,1The output device of mould gyrotron traveling wave tube |
| CN108243550A (en) * | 2016-12-23 | 2018-07-03 | 韩国基础科学支援研究院 | Linear electromagnetic wave plasma source and use its plasma processing apparatus |
| WO2018120737A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳超级数据链技术有限公司 | Feed structure of slab waveguide antenna |
| CN106941061A (en) * | 2017-04-25 | 2017-07-11 | 电子科技大学 | Compact type broadband TEn0‑HE0nMode conversion device |
| CN106941061B (en) * | 2017-04-25 | 2018-08-21 | 电子科技大学 | Compact type broadband TEn0-HE0nMode conversion device |
| CN107634296A (en) * | 2017-09-01 | 2018-01-26 | 西北核技术研究所 | High-Power Microwave TE11Mould polarized rotation synthesizer and polarized rotation synthetic method |
| CN109887819A (en) * | 2019-01-10 | 2019-06-14 | 北京大学 | A kind of Terahertz gyrotron side corner mould backward wave interaction circuit and its control method |
| CN112886159A (en) * | 2021-01-13 | 2021-06-01 | 上海科技大学 | Broadband silicon-based metal waveguide rectangular-circular mode converter |
| CN113764242A (en) * | 2021-07-30 | 2021-12-07 | 中国工程物理研究院应用电子学研究所 | Conformal input coupling miniaturized relativistic klystron amplifier |
| CN113764242B (en) * | 2021-07-30 | 2023-06-20 | 中国工程物理研究院应用电子学研究所 | Conformal input coupling miniaturized relativistic klystron amplifier |
| CN116247394A (en) * | 2023-01-06 | 2023-06-09 | 中国人民解放军63660部队 | Rectangular waveguide TE 10 Circular waveguide polarization tunable TE 11 Mode converter |
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Application publication date: 20120314 |