CN110931920A - Rectangular waveguide TE10Mode-to-circular waveguide TE02Mode converter - Google Patents
Rectangular waveguide TE10Mode-to-circular waveguide TE02Mode converter Download PDFInfo
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- CN110931920A CN110931920A CN201911198342.8A CN201911198342A CN110931920A CN 110931920 A CN110931920 A CN 110931920A CN 201911198342 A CN201911198342 A CN 201911198342A CN 110931920 A CN110931920 A CN 110931920A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
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Abstract
The invention discloses a rectangular waveguide TE10Mode-to-circular waveguide TE02A modular broadband mode converter belongs to the technical field of microwave and millimeter wave devices. The design route adopted by the invention is as follows: standard rectangular waveguide TE10Mode-rectangular waveguide TE20Mode-rectangular waveguide TE40Mode-cross waveguide TE44Mode-cross fan waveguide TE44Mode-circular waveguide TE02And (5) molding. Rectangular waveguide TE in the invention10Mode to TE02The mode broadband mode converter changes the boundary condition for restraining the propagation of electromagnetic waves in the waveguide by changing the external shape of the waveguide and realizes the rectangular waveguide TE with a linear gradually-changed structure by means of a scheme of a transfer mode10Mode-to-circular waveguide TE02And (4) converting the mode of the mode broadband. The invention effectively solves the problems of low mode conversion efficiency and narrower bandwidth, and each mode conversion section of the invention is of a linear gradual change structure, so the mode converter of the invention has simple structure, convenient processing and strong practicability.
Description
Technical Field
The invention belongs to the technical field of microwave and millimeter wave devices, and particularly relates to a novel broadband rectangular waveguide TE10To circular waveguide TE02A modular broadband mode converter.
Background
The mode converter is a microwave passive device widely applied to the fields of satellite communication, satellite-borne radar, microwave measurement, microwave power synthesis and the like. In the study of gyrotron, due to the adoption of high-order modes, the conversion between different modes becomes an important means for mode selection and suppression and electromagnetic wave input/output coupling, and many types of mode converters are derived according to the application purpose difference of the mode converters. Conventional rectangular waveguide TE10Mode-to-circular waveguide TE02The main design routes of the mode converter are as follows: rectangular waveguide TE10Mode conversion to coaxial waveguide TE01Mode retransformation to circular waveguide TE02A mode converter. Due to TE in circular waveguide01And TE02Very close to the transition coefficient of (TE) in the coaxial waveguide01The reflection of the mode is severe and the conversion coefficient of other miscellaneous modes is low, so that the electric field intensity in the circular waveguide is mainly TE01And TE02The superposition of the two mode fields has serious mutual coupling phenomenon between the two. It is found by analysis that it is difficult to enhance TE by butting the coaxial waveguide and the circular waveguide02Modulus conversion factor and attenuation TE01The conversion strength of the mode, and in order to solve this problem, designers have proposed adding a wedge transition section between the coaxial waveguide and the circular waveguide. The addition of a wedge mode transition section although enhancing TE in the converter02Die output intensity, TE suppression01Output of modes, but the above-mentioned rectangular waveguide TE of conventional structure10To circular waveguide TE02The mode converter has the defects of low mode conversion efficiency, narrow bandwidth and the like.
Disclosure of Invention
In order to overcome the traditionRectangular waveguide TE10Mode-to-circular waveguide TE02The invention provides a novel rectangular waveguide TE and solves the problems of low conversion efficiency and narrow bandwidth of a mode converter10Mode-to-circular waveguide TE02A modular broadband mode converter. A new design route is adopted: standard rectangular waveguide TE10Mode-rectangular waveguide TE20Mode-rectangular waveguide TE40Mode-cross waveguide TE44Mode-cross fan waveguide TE44Mode-circular waveguide TE02Mode converters of modes. Rectangular waveguide TE in the invention10Mode to TE02The mode broadband mode converter changes the boundary condition for restraining the propagation of electromagnetic waves in the waveguide by changing the external shape of the waveguide and realizes the rectangular waveguide TE with a linear gradually-changed structure by means of a scheme of a transfer mode10Mode-to-circular waveguide TE02And (4) converting the mode of the mode broadband.
The technical scheme of the invention is as follows:
rectangular waveguide TE10Mode-to-circular waveguide TE02A modular broadband mode converter comprising 4 mode conversion sections connected in sequence:
a first mode transition segment: standard rectangular waveguide TE10Mode-to-non-standard rectangular waveguide TE40Conversion of a mould
The narrow edge of the first standard rectangular waveguide is linearly gradually changed into two second standard rectangular waveguides through the Y-shaped power divider, and the two second standard rectangular waveguides are linearly gradually changed into two T-shaped waveguides; linearly gradually changing each T-shaped waveguide to a third rectangular waveguide with doubled width edge to realize TE10Mode to TE20The mode conversion is carried out, the two third rectangular waveguides are combined and then linearly and gradually changed to a fourth rectangular waveguide with 4 times of wide edge, and the TE is realized20Mode-to-non-standard rectangular waveguide TE40And (4) converting the mode. Wherein, the T-shaped waveguide is formed by two standard rectangular waveguides which are perpendicular to each other.
A second mode transition segment: non-standard rectangular waveguide TE40Mode-to-cross waveguide TE44Conversion of a mould
Linearly and gradually changing the fourth rectangular waveguide into a cross-shaped waveguide to realize TE transition from the rectangular waveguide40Mode-to-cross waveguide TE44And (4) converting the mode. And the sizes of the two arms of the cross-shaped waveguide are the same as that of the fourth rectangular waveguide, and the two arms of the cross-shaped waveguide and the fourth rectangular waveguide form an included angle of 45 degrees. In order to improve the mode conversion efficiency and the working bandwidth of the second mode conversion section, the length of the second mode conversion section is 5-7 times of the free space wavelength of the electromagnetic wave at the central frequency point.
A third mode transition segment: cross waveguide TE44 mode to cross fan waveguide TE44Conversion of a mould
The cross-shaped waveguide is linearly changed into a cross-shaped fan-shaped waveguide to realize TE from the cross-shaped waveguide44Mode-to-cross sector waveguide TE44And (4) transforming the mode. The outer radius of the cross fan-shaped waveguide is the same as that of the circular waveguide at the output end. The design of the third mode conversion section effectively inhibits the mixed mode interference and improves the TE of the cross waveguide44Mode to TE02The conversion efficiency of the mode is increased, and the TE of the rectangular waveguide is increased10To circular waveguide TE02Bandwidth of the mode-wideband mode converter.
A fourth mode transition section: cross fan waveguide TE44Mode-to-circular waveguide TE02Conversion of a mould
The cross fan-shaped waveguide is linearly gradually changed into a circular waveguide to realize the TE of the cross fan-shaped waveguide44Mode-to-circular waveguide TE02And (4) converting the mode. Wherein the radius of the circular waveguide is larger than the cutoff radius of the operating mode.
The invention has the following main advantages:
1. the working frequency band is wide, the relative bandwidth reaches more than 37 percent, and is far larger than the TE of the traditional rectangular waveguide10Mode-to-circular waveguide TE02A mode converter;
2. the conversion mode has high purity, the mode conversion efficiency in the working frequency band is more than 95 percent and far higher than the TE of the traditional rectangular waveguide10Mode-to-circular waveguide TE02A mode converter;
3. the transition section from the cross waveguide to the circular waveguide is a cross fan-shaped waveguide, the design of the transition section effectively inhibits the mixed mode interference, and the TE of the cross waveguide is improved44Mode-to-circular waveguide TE02The conversion efficiency of the die;
4. each mode conversion section is linearly and gradually changed, so that the mode converter is simple in structure and convenient to process.
Drawings
FIG. 1 rectangular waveguide TE10Mode to TE023D structure diagram of module broadband mode converter
FIG. 2 rectangular waveguide TE10Mode to TE02Front view of a modular broadband mode converter
FIG. 3 rectangular waveguide TE10Mode to TE02Top view of a modular broadband mode converter
FIG. 4 is a cross fan transition diagram
FIG. 5 is a rectangular waveguide TE obtained by HFSS high-frequency simulation software10Mode to TE02Electric field distribution diagram of modular broadband mode converter
FIG. 6 is a rectangular waveguide TE obtained by HFSS high-frequency simulation software10Mode to TE02Graph of transmission parameters (S21 parameters) versus operating frequency (from the W-band) for a mode-wideband mode converter
FIG. 7 is a rectangular waveguide TE obtained by HFSS high-frequency simulation software simulation10Mode to TE02Reflection parameter (S11 parameter) versus operating frequency (W-band) for a mode-wideband mode converter
Detailed Description
With a rectangular waveguide TE operating in the W-band10Mode-to-circular waveguide TE02The invention is further elaborated on by way of example of the design of the mode converter and the accompanying drawings:
working frequency band: the W band (from 75GHz to 110GHz) has a center frequency of about 93 GHz.
FIG. 1 is a rectangular waveguide TE10Mode to TE02A 3-dimensional structure diagram of the modular broadband mode converter; FIG. 2 is a rectangular waveguide TE10Mode to TE02A front view of a mode broadband mode converter; FIG. 3 is a rectangular waveguide TE10Mode to TE02A top view of a mode broadband mode converter; the main structure of this embodiment includes: a first standard rectangular waveguide (1), a Y-shaped power divider (2), a second standard rectangular waveguide (3) from the second standard rectangular waveguide toT type waveguide changeover portion (4), T type waveguide (5), T type waveguide is to third rectangular waveguide transition section (6), third rectangular waveguide (7), third rectangular waveguide is to fourth rectangular waveguide transition section (8), fourth rectangular waveguide (9), fourth rectangular waveguide is to cross waveguide transition section (10), cross waveguide (11), cross waveguide is to cross fan-shaped waveguide transition section (12), cross fan-shaped waveguide transition section (13), circular waveguide (14).
1: a first mode transition segment: standard rectangular waveguide TE10Mode-to-non-standard rectangular waveguide TE40Conversion of a mould
a. First and second standard rectangular waveguides (1, 3): the BJ900 standard rectangular waveguide has 2.54mm wide side and 1.27mm narrow side.
b.T-shaped waveguide (5): the waveguide is composed of two BJ900 standard rectangular waveguides which are perpendicular to each other, and the cross section of the horizontal part of the waveguide has the following dimensions: 2.54 x 1.27mm, the dimensions of the cross section of the vertical part thereof being: 1.27X 1.27 mm.
c. Propagating TE20Third rectangular waveguide of modes (7): the wide side of the cross section size is twice of that of the standard rectangular waveguide, the narrow side of the cross section size is the same as that of the standard rectangular waveguide, the wide side of the cross section size is 5.08mm, and the narrow side of the cross section size is 1.27 mm.
d. Propagating TE40Fourth rectangular waveguide of mode (9): the wide side is four times of the standard rectangular waveguide, the narrow side is the same as the narrow side of the standard rectangular waveguide, the wide side is 10.16mm, and the narrow side is 1.27 mm.
Model e.Y power divider (2): the length is 8.8 mm.
f. Second standard rectangular waveguide to T-waveguide transition (4): the length is 6 mm.
g.T type waveguide to third rectangular waveguide transition (6): the length is 18 mm.
h. Third to fourth rectangular waveguide transition (8): the length is 10 mm.
2: a second mode transition segment: non-standard rectangular waveguide TE40Mode-to-cross waveguide TE44Conversion of a mould
a. Cross-shaped waveguide (11): two-arm size and propagation TE of cross-shaped waveguide40The non-standard rectangular waveguides of the mode have the same size, the wide edges of two arms of the cross-shaped waveguide are 10.16mm, and the narrow edges of the two arms of the cross-shaped waveguide are 1.27 mm;the two arms of the cross-shaped waveguide are respectively connected with the TE40The mode non-standard rectangular wave included angle was 45 °.
b. A fourth rectangular-to-cross-shaped waveguide transition (10): the length is 43 mm.
3: a third mode transition segment: cross waveguide TE44 mode to cross fan waveguide TE44Conversion of a mould
Cross-waveguide to cross-sector waveguide transition (12): the length is 33mm, and the radius of the cross fan-shaped waveguide is the same as that of the circular waveguide at the output end.
4: a fourth mode transition section: cross fan waveguide TE44Mode-to-circular waveguide TE02Conversion of a mould
a. Cross sector waveguide to circular waveguide transition (13): the length is 55 mm.
b.TE02Mode-output circular waveguide (14): radius 5mm, length 7 mm.
FIG. 5 is a rectangular waveguide TE obtained by HFSS high-frequency simulation software10Mode-to-circular waveguide TE02Electric field profile (W-band) of the mode-wideband mode converter.
FIG. 6 is a rectangular waveguide TE obtained by HFSS high-frequency simulation software10Mode to TE02A graph of transmission parameters (S21 parameters) versus operating frequency (W-band) for a mode-wideband mode converter; the figure shows that the transmission parameter of the novel broadband mode converter is about-0.2 dB in the W frequency band, and the performance is superior.
FIG. 7 is a rectangular waveguide TE obtained by HFSS high-frequency simulation software simulation10Mode to TE02Reflection parameters (S11 parameters) of the mode-broadband mode converter are plotted against the operating frequency (W-band). The figure shows that the reflection parameter of the novel broadband mode converter is about-24 dB in the W frequency band, the return loss is large, and the engineering requirement is met.
The rectangular waveguide TE of the W wave band can be completed through the steps10Mode-to-circular waveguide TE02Designing a mode broadband mode converter, and then establishing a 3-dimensional model on HFSS high-frequency simulation software for simulation verification.
The above examples are merely for convenience of illustration of the novel invention, which can beRectangular waveguide TE suitable for other frequency bands10Mode-to-circular waveguide TE02A modular broadband mode converter.
Claims (6)
1. Rectangular waveguide TE10Mode-to-circular waveguide TE02Mode-mode converter, characterized in that it comprises 4 mode conversion sections connected in series, wherein the first mode conversion section is a standard rectangular waveguide TE10Mode-to-non-standard rectangular waveguide TE40Transforming a mode; the second mode conversion section is a non-standard rectangular waveguide TE40Mode-to-cross waveguide TE44Transforming a mode; the third mode conversion section is from a cross-shaped waveguide TE44 mode to a cross-shaped fan-shaped waveguide TE44Transforming a mode; the fourth mode conversion section is a cross fan-shaped waveguide TE44Mode-to-circular waveguide TE02Transforming a mode; implementation of TE from rectangular waveguide10Mode-to-circular waveguide TE02Mode conversion of the mode.
2. A rectangular waveguide TE as in claim 110Mode-to-circular waveguide TE02In the first mode conversion section, the narrow side of the first standard rectangular waveguide is linearly tapered into two second standard rectangular waveguides through a Y-shaped power divider, and the two second standard rectangular waveguides are linearly tapered into two T-shaped waveguides; linearly gradually changing each T-shaped waveguide to a third rectangular waveguide with doubled width edge to realize rectangular waveguide TE10Mode to TE20Mode conversion, and linear gradual change of the two third rectangular waveguides to a fourth rectangular waveguide with 4 times of wide edge after combination to realize TE20Mode-to-non-standard rectangular waveguide TE40And (4) converting the mode.
3. A rectangular waveguide TE as in claim 210Mode-to-circular waveguide TE02A mode-mode converter, wherein in said second mode-conversion section, a fourth rectangular waveguide is linearly tapered into a cross-shaped waveguide to effect TE transition from the rectangular waveguide40Mode-to-cross waveguide TE44Converting a mould; wherein the size of two arms of the cross-shaped waveguide is the same as that of the fourth rectangular waveguideAnd both arms of the cross-shaped waveguide form an included angle of 45 degrees with the fourth rectangular waveguide.
4. A rectangular waveguide TE as in claim 310Mode-to-circular waveguide TE02A mode converter, wherein in said third mode conversion section, a cross-shaped waveguide is linearly tapered into a cross-shaped sector waveguide to effect TE transition from the cross-shaped waveguide44Mode-to-cross sector waveguide TE44Transforming a mode; wherein, the outer radius of the cross fan-shaped waveguide is the same as that of the circular waveguide at the output end.
5. A rectangular waveguide TE according to claim 410Mode-to-circular waveguide TE02The mode converter is characterized in that in the fourth mode conversion section, the cross fan-shaped waveguide is linearly changed into a circular waveguide to realize the TE of the cross fan-shaped waveguide44Mode-to-circular waveguide TE02Converting a mould; wherein the radius of the circular waveguide is larger than the cutoff radius of the working mode.
6. A rectangular waveguide TE as claimed in claim 1 or 310Mode-to-circular waveguide TE02The mode converter is characterized in that the length of the second mode conversion section is 5-7 times of the free space wavelength of the electromagnetic wave at the central frequency point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911198342.8A CN110931920A (en) | 2019-11-29 | 2019-11-29 | Rectangular waveguide TE10Mode-to-circular waveguide TE02Mode converter |
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| CN201911198342.8A CN110931920A (en) | 2019-11-29 | 2019-11-29 | Rectangular waveguide TE10Mode-to-circular waveguide TE02Mode converter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909472A (en) * | 2021-01-14 | 2021-06-04 | 电子科技大学 | TE based on rectangular waveguide20Mode power divider |
| GB2593159A (en) * | 2020-03-12 | 2021-09-22 | Univ Lancaster | Method and apparatus for supplying electromagnetic power to a plasma vessel |
| CN114041880A (en) * | 2021-11-24 | 2022-02-15 | 电子科技大学 | Medical treatment surgical robot's end puncture executive device |
| CN114256569A (en) * | 2021-11-22 | 2022-03-29 | 电子科技大学 | Rectangular waveguide mode converter and power distribution synthesizer |
| CN114927399A (en) * | 2022-05-27 | 2022-08-19 | 电子科技大学 | Relativistic magnetron with split axial energy extraction structure |
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| US20160116482A1 (en) * | 2013-08-06 | 2016-04-28 | The Penn State Research Foundation | Target Binding Molecules Identified by Kinetic Target-Guided Synthesis |
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2019
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| US20160116482A1 (en) * | 2013-08-06 | 2016-04-28 | The Penn State Research Foundation | Target Binding Molecules Identified by Kinetic Target-Guided Synthesis |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2593159A (en) * | 2020-03-12 | 2021-09-22 | Univ Lancaster | Method and apparatus for supplying electromagnetic power to a plasma vessel |
| CN112909472A (en) * | 2021-01-14 | 2021-06-04 | 电子科技大学 | TE based on rectangular waveguide20Mode power divider |
| CN114256569A (en) * | 2021-11-22 | 2022-03-29 | 电子科技大学 | Rectangular waveguide mode converter and power distribution synthesizer |
| CN114041880A (en) * | 2021-11-24 | 2022-02-15 | 电子科技大学 | Medical treatment surgical robot's end puncture executive device |
| CN114041880B (en) * | 2021-11-24 | 2023-06-16 | 电子科技大学 | End puncture execution device of medical surgical robot |
| CN114927399A (en) * | 2022-05-27 | 2022-08-19 | 电子科技大学 | Relativistic magnetron with split axial energy extraction structure |
| CN114927399B (en) * | 2022-05-27 | 2023-04-11 | 电子科技大学 | Relativistic magnetron with split axial energy extraction structure |
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Application publication date: 20200327 |