CN104716407A - Microwave mode converter - Google Patents
Microwave mode converter Download PDFInfo
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- CN104716407A CN104716407A CN201510007161.8A CN201510007161A CN104716407A CN 104716407 A CN104716407 A CN 104716407A CN 201510007161 A CN201510007161 A CN 201510007161A CN 104716407 A CN104716407 A CN 104716407A
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Abstract
The invention provides a microwave mode converter which comprises a circular input waveguide, a circular coupling waveguide, a circular short circuit waveguide, a first rectangular short circuit waveguide, a second rectangular short circuit waveguide and a rectangular output waveguide. The circular coupling waveguide is connected with the circuit input waveguide and the circular short circuit waveguide and located between the circuit input waveguide and the circular short circuit waveguide. The first rectangular short circuit waveguide, the second rectangular short circuit waveguide and the rectangular output waveguide are all crossed with the circular coupling waveguide, and the included angle between every two of the first rectangular short circuit waveguide, the second rectangular short circuit waveguide and the rectangular output waveguide is 120 degrees. At least one of the circular short circuit waveguide, the first rectangular short circuit waveguide and the second rectangular short circuit waveguide is internally provided with a length-changeable short circuit piston. By means of the microwave mode converter, efficient conversion of a circular waveguide TM01 mode to a rectangular waveguide TE10 mode can be achieved, meanwhile, the tuning range can be enlarged, the tuning of the mode converter within a certain range is achieved, and the limitation of the bandwidth limitation of narrow-band devices can be broken through.
Description
Technical field
The present invention relates to Microwave Treatment technical field, particularly relate to a kind of microwave mode transducer.
Background technology
Tradition HPM (High-Power Microwave) generation device produces TM
01pattern, synthesizes the multichannel of High-Power Microwave and radiation generally needs first by TM
01patten transformation becomes the circular waveguide TE of linear polarization
11pattern or rectangular waveguide TE
10pattern.HPM is conveniently control model when transmitting, and often needs multi-form waveguide to go forward side by side row mode conversion, carries out multichannel coupling often need to produce rectangle TE for obtaining higher microwave power
10pattern and change microwave propagation direction, some high power microwave radiation antennas need rectangular waveguide TE
10mode excitation.At present, for TM
01-TE
10mode converter, scholars conducts in-depth research, and can realize TM efficiently
01pattern is to rectangle TE
10patten transformation, but, current TM
01-TE
10mode converter is narrowband device, can only realize the mode conversion efficiency of 99% in 1% bandwidth or less scope.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is to provide a kind of microwave mode transducer, can improve tuning range, breaks through the limitation of narrowband device bandwidth restriction.
(2) technical scheme
For solving the problems of the technologies described above, technical scheme of the present invention provides a kind of microwave mode transducer, comprises input circular waveguide, Coupled Circle waveguide, short circuit circular waveguide, the first short circuit rectangular waveguide, the second short circuit rectangular waveguide and exports rectangular waveguide;
Described Coupled Circle waveguide, is all connected with described input circular waveguide, described short circuit circular waveguide and is positioned between the two;
Described first short circuit rectangular waveguide, described second short circuit rectangular waveguide and described output rectangular waveguide, all crossing with described Coupled Circle waveguide and angle between any two is 120 degree;
In described short circuit circular waveguide, described first short circuit rectangular waveguide and described second short circuit rectangular waveguide, the inside of at least one waveguide is provided with the short-circuit plunger that can change its length.
Further, in described first short circuit rectangular waveguide and described second short circuit rectangular waveguide, the inside of at least one waveguide is provided with the short-circuit plunger that can change its length, and the excursion of described length is 31.5mm-36.5mm.
Further, the inside of described short circuit circular waveguide is provided with the short-circuit plunger that can change its length, and the excursion of described length is 10.5m-16mm.
Further, the radius of described input circular waveguide is 14mm, and the radius of described Coupled Circle waveguide is 25.7mm, and the radius of described short circuit circular waveguide is 20mm.
Further, between described input circular waveguide and described Coupled Circle waveguide, be provided with the chamfering that radius is 4mm, between described Coupled Circle waveguide and described short circuit circular waveguide, be provided with the chamfering that radius is 4mm.
Further, the chamfering that radius is 1mm is equipped with between between between described first short circuit rectangular waveguide and described Coupled Circle waveguide, between described second short circuit rectangular waveguide and described Coupled Circle waveguide and between described output rectangular waveguide and described Coupled Circle waveguide.
Further, described short-circuit plunger is choke piston.
(3) beneficial effect
Microwave mode transducer provided by the invention, can realize circular waveguide TM
01pattern is to rectangular waveguide TE
10the high efficiency conversion of pattern, can improve tuning range, implementation pattern transducer is tuning within the specific limits simultaneously, thus breaks through the limitation of narrowband device bandwidth restriction.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of microwave mode transducer that embodiment of the present invention provides;
Fig. 2 is the end view of the microwave mode transducer shown in Fig. 1;
Fig. 3 is the vertical view of the microwave mode transducer shown in Fig. 1;
Fig. 4 is that S parameter provided by the invention is with short circuit rectangular waveguide length h
1the schematic diagram of change curve;
Fig. 5 is that S parameter provided by the invention is with short circuit circular waveguide length h
2the schematic diagram of change curve;
Fig. 6 is that the S parameter of maximum transmitted Frequency point provided by the invention and correspondence is with h
1the schematic diagram of change;
Fig. 7 is that the S parameter of maximum transmitted Frequency point provided by the invention and correspondence is with h
2the schematic diagram of change.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is the schematic diagram of a kind of microwave mode transducer that embodiment of the present invention provides, and comprises input circular waveguide 1, Coupled Circle waveguide 2, short circuit circular waveguide 3, first short circuit rectangular waveguide 4, second short circuit rectangular waveguide 5 and exports rectangular waveguide 6;
Described Coupled Circle waveguide, is all connected with described input circular waveguide, described short circuit circular waveguide and is positioned between the two;
Described first short circuit rectangular waveguide, described second short circuit rectangular waveguide and described output rectangular waveguide, all crossing with described Coupled Circle waveguide and angle between any two is 120 degree;
In described short circuit circular waveguide, described first short circuit rectangular waveguide and described second short circuit rectangular waveguide, the inside of at least one waveguide is provided with the short-circuit plunger that can change its length, and wherein, described short-circuit plunger can be choke piston.
Fig. 2 and Fig. 3 is respectively end view and the vertical view of above-mentioned microwave mode transducer.
Preferably, in described first short circuit rectangular waveguide and described second short circuit rectangular waveguide, the inside of at least one waveguide is provided with the short-circuit plunger that can change its length, and the excursion of described length is 31.5mm-36.5mm.
Preferably, the inside of described short circuit circular waveguide is provided with the short-circuit plunger that can change its length, and the excursion of described length is 10.5m-16mm.
Preferably, the radius of described input circular waveguide is 14mm, and the radius of described Coupled Circle waveguide is 25.7mm, and the radius of described short circuit circular waveguide is 20mm.
Preferably, between described input circular waveguide and described Coupled Circle waveguide, be provided with the chamfering that radius is 4mm, between described Coupled Circle waveguide and described short circuit circular waveguide, be provided with the chamfering that radius is 4mm.
Preferably, the chamfering that radius is 1mm is equipped with between between between described first short circuit rectangular waveguide and described Coupled Circle waveguide, between described second short circuit rectangular waveguide and described Coupled Circle waveguide and between described output rectangular waveguide and described Coupled Circle waveguide.
The microwave mode transducer that embodiment of the present invention provides, can realize circular waveguide TM
01pattern is to rectangular waveguide TE
10the high efficiency conversion of pattern, tuning range can be improved simultaneously, implementation pattern transducer is tuning (mode conversion efficiency is greater than 99%) within the specific limits, thus break through the limitation of narrowband device bandwidth restriction, and the problem of high power capacity can also be solved, in this microwave mode transducer, E face, the top input microwave of input circular waveguide, the bottom surface short circuit of short circuit circular waveguide, three rectangular waveguides (comprise the first short circuit rectangular waveguide, second short circuit rectangular waveguide and output rectangular waveguide) crossing with coupled section circular waveguide, and angle is 120 ° between any two rectangular waveguides, (input port of input circular waveguide is defined as port one to comprise two ports in this structure, the output port exporting rectangular waveguide is defined as port 2) and four patterns, pattern is defined as mode N:M, wherein N is port sequence number, M is the mode index relevant with port N, specifically comprise mode1:1 (TE11 pattern polarised direction is along X-axis), mode1:2 (TE11 pattern polarised direction is along Y-axis), mode1:3 (TM01 pattern) and mode2:1 (TE10 pattern), by selecting the suitable plane of reference, the target S parameter matrix of mode converter is as follows:
Its operation principle is: port one injects the TE along Y-direction polarization
11pattern, the linear polarization TE of injection
11pattern is totally reflected, and being equivalent to plane of symmetry YOZ plane is magnetic border.Port one injects the TE along X to polarization
11pattern, the TE of the linear polarization of injection
11pattern is totally reflected, and being equivalent to plane of symmetry YOZ plane is electric border.Port one injection way TM
01pattern, port 2 output mode is TE
10pattern, being equivalent to plane of symmetry YOZ plane is magnetic border and circular waveguide TM
01pattern and rectangular waveguide TE
10pattern can realize high efficiency conversion.
At TM
01-TE
10in the simulation of mode converter, YOZ plane is arranged to magnetic boundary condition, a network be made up of two ports and two patterns can be obtained, based on this Two-port netwerk mode network, by optimizing short circuit rectangular waveguide length, the radius of the radius of short circuit circular waveguide, height and Coupled Circle waveguide can realize circular waveguide TM
01mould-rectangular waveguide TE
10the high efficiency of transmission of mould, by input circular waveguide, introduce between short circuit circular waveguide and Coupled Circle waveguide chamfering can effectively reduce field strengthen, improve power capacity.
For X-band centre frequency 9.7GHz: the radius R of input circular waveguide
1=14mm, the radius R of Coupled Circle waveguide
2=25.7mm, the radius R of short circuit circular waveguide
3=20mm, exports rectangular waveguide and first, second short circuit rectangular waveguide is of a size of 22.86mm × 10.16mm, length (i.e. the distance of short circuit face and the z-axis) h of first, second short circuit rectangular waveguide
1=32.7mm, the length h of short circuit circular waveguide
2=12.5mm, the chamfering between input circular waveguide and Coupled Circle waveguide is R
4=4mm, the chamfering R between Coupled Circle waveguide and short circuit circular waveguide
5=4mm, input rectangular waveguide, chamfering R between first, second short circuit rectangular waveguide and Coupled Circle waveguide
6=1mm, the centre frequency of this mode converter is 9.7GHz, S (1:3,2:1)=-0.0004dB, S (1:3,1:3)=-40.8dB, and-1dB the bandwidth of mode converter is: 9.28-10.08GHz.Port one injecting power is the TM of 1W
01pattern, maximum field strength 3800V/m, calculate according to 1MV/cm breakdown threshold, its power capacity can reach 700MW.If need to obtain more high power capacity, can from increasing input circular waveguide radius, the aspect such as chamfering of circular waveguide junction start with and obtain optimum structure by global optimization, in addition, for making mode converter compact conformation, each dimension of mode converter all can be less than 60mm.
The each parameter of analytical model transducer, on the impact of its transmission coefficient, by controlling the tuning of some critical size change implementation pattern transducer, on the basis of mode converter optimal size, can change h within the specific limits
1, h
2, obtain the relation between mode converter conversion efficiency and each Parameters variation, conversion efficiency is with short circuit rectangular waveguide length h
1with the length h of short circuit circular waveguide
2approximate period changes, and its change as shown in Figures 4 and 5.
Conversion efficiency is with short circuit rectangular waveguide length h
1with short circuit circular waveguide length h
2approximate period changes, h
1when increasing between 31.5mm-36.5mm, maximum transmitted Frequency point monotone decreasing between 9.9GHz-9.2GHz, maximum transmitted Frequency point associative mode conversion efficiency is greater than 99%, as shown in Figure 6; h
2when increasing between 10.5m-16mm, maximum transmitted Frequency point monotone decreasing between 10.1GHz-9.2GHz, the mode conversion efficiency that maximum transmitted Frequency point is corresponding is greater than 99%, as shown in Figure 7.In the present invention, regulate the length of short circuit circular waveguide and the length of first, second short circuit rectangular waveguide all can realize frequency tuning, preferably, can by bottom surface open circles WAVEGUIDE LOADED choke piston thus the mode of the length of adjustment short circuit circular waveguide realize.
The microwave mode transducer that embodiment of the present invention provides, by the size of control inputs circular waveguide radius, Coupled Circle waveguide dimensions, short circuit circular waveguide, short circuit rectangular waveguide, makes circular waveguide TM
01pattern-rectangular waveguide TE
10efficient conversion (conversion efficiency is greater than 99.9%) is realized between pattern, regulate the length of short circuit circular waveguide can implementation pattern transducer tuning within the scope of 9.2-10.1GHz (mode conversion efficiency is greater than 99%), mode converter can be made to be operated in different frequency range by adjusted size, effectively field intensity can be reduced by introducing chamfering, improve power capacity, have good application prospect in fields such as microwave transmission, microwave mode conversion and microwave multi-path synthesis.
Above execution mode is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (7)
1. a microwave mode transducer, is characterized in that, comprises input circular waveguide, Coupled Circle waveguide, short circuit circular waveguide, the first short circuit rectangular waveguide, the second short circuit rectangular waveguide and exports rectangular waveguide;
Described Coupled Circle waveguide, is all connected with described input circular waveguide, described short circuit circular waveguide and is positioned between the two;
Described first short circuit rectangular waveguide, described second short circuit rectangular waveguide and described output rectangular waveguide, all crossing with described Coupled Circle waveguide and angle between any two is 120 degree;
In described short circuit circular waveguide, described first short circuit rectangular waveguide and described second short circuit rectangular waveguide, the inside of at least one waveguide is provided with the short-circuit plunger that can change its length.
2. microwave mode transducer according to claim 1, it is characterized in that, in described first short circuit rectangular waveguide and described second short circuit rectangular waveguide, the inside of at least one waveguide is provided with the short-circuit plunger that can change its length, and the excursion of described length is 31.5mm-36.5mm.
3. microwave mode transducer according to claim 1, is characterized in that, the inside of described short circuit circular waveguide is provided with the short-circuit plunger that can change its length, and the excursion of described length is 10.5m-16mm.
4. microwave mode transducer according to claim 1, is characterized in that, the radius of described input circular waveguide is 14mm, and the radius of described Coupled Circle waveguide is 25.7mm, and the radius of described short circuit circular waveguide is 20mm.
5. microwave mode transducer according to claim 1, is characterized in that, is provided with the chamfering that radius is 4mm between described input circular waveguide and described Coupled Circle waveguide, is provided with the chamfering that radius is 4mm between described Coupled Circle waveguide and described short circuit circular waveguide.
6. microwave mode transducer according to claim 1, it is characterized in that, between between between described first short circuit rectangular waveguide and described Coupled Circle waveguide, between described second short circuit rectangular waveguide and described Coupled Circle waveguide and between described output rectangular waveguide and described Coupled Circle waveguide, be equipped with the chamfering that radius is 1mm.
7., according to the arbitrary described microwave mode transducer of claim 1-6, it is characterized in that, described short-circuit plunger is choke piston.
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|---|---|---|---|
| CN201510007161.8A CN104716407B (en) | 2015-01-07 | 2015-01-07 | Microwave mode converter |
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|---|---|---|---|
| CN201510007161.8A CN104716407B (en) | 2015-01-07 | 2015-01-07 | Microwave mode converter |
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| CN104716407B CN104716407B (en) | 2018-04-03 |
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Cited By (7)
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| CN105489976A (en) * | 2015-12-16 | 2016-04-13 | 西安空间无线电技术研究所 | Compact circular waveguide TM01-TE01 mode converter |
| CN106099288A (en) * | 2016-07-13 | 2016-11-09 | 西北核技术研究所 | It is applied to the compact five-port junction structure of three tunnel efficient high-isolation power combing |
| CN108682961A (en) * | 2018-05-10 | 2018-10-19 | 昆山九华电子设备厂 | A kind of circular waveguide leaky wave slot antenna based on TM01 moulds |
| CN110719683A (en) * | 2019-09-23 | 2020-01-21 | 西安空间无线电技术研究所 | Linear accelerating tube waveguide coupler |
| CN112103652A (en) * | 2020-08-11 | 2020-12-18 | 星展测控科技股份有限公司 | Double-path waveguide phase matching device |
| CN112886159A (en) * | 2021-01-13 | 2021-06-01 | 上海科技大学 | Broadband silicon-based metal waveguide rectangular-circular mode converter |
| CN116207463A (en) * | 2022-12-29 | 2023-06-02 | 西北核技术研究所 | Compact coplanar homodromous rectangular waveguide TE 10-TE 20 mode converter |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489976A (en) * | 2015-12-16 | 2016-04-13 | 西安空间无线电技术研究所 | Compact circular waveguide TM01-TE01 mode converter |
| CN105489976B (en) * | 2015-12-16 | 2018-02-09 | 西安空间无线电技术研究所 | A kind of compact circular waveguide TM01 TE01 mode converters |
| CN106099288A (en) * | 2016-07-13 | 2016-11-09 | 西北核技术研究所 | It is applied to the compact five-port junction structure of three tunnel efficient high-isolation power combing |
| CN106099288B (en) * | 2016-07-13 | 2018-10-26 | 西北核技术研究所 | Compact five-port junction structure applied to the efficient high-isolation power combing in three tunnels |
| CN108682961A (en) * | 2018-05-10 | 2018-10-19 | 昆山九华电子设备厂 | A kind of circular waveguide leaky wave slot antenna based on TM01 moulds |
| CN108682961B (en) * | 2018-05-10 | 2024-02-23 | 昆山九华电子设备厂 | Circular waveguide leaky wave slot antenna based on TM01 mode |
| CN110719683A (en) * | 2019-09-23 | 2020-01-21 | 西安空间无线电技术研究所 | Linear accelerating tube waveguide coupler |
| CN112103652A (en) * | 2020-08-11 | 2020-12-18 | 星展测控科技股份有限公司 | Double-path waveguide phase matching device |
| CN112103652B (en) * | 2020-08-11 | 2024-02-06 | 星展测控科技股份有限公司 | Double-path waveguide phase matching device |
| CN112886159A (en) * | 2021-01-13 | 2021-06-01 | 上海科技大学 | Broadband silicon-based metal waveguide rectangular-circular mode converter |
| CN116207463A (en) * | 2022-12-29 | 2023-06-02 | 西北核技术研究所 | Compact coplanar homodromous rectangular waveguide TE 10-TE 20 mode converter |
| CN116207463B (en) * | 2022-12-29 | 2024-06-11 | 西北核技术研究所 | Compact coplanar homodromous rectangular waveguide TE 10-TE 20 mode converter |
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