CN116247394B - Rectangular waveguide TE10Circular waveguide polarization tunable TE11Mode converter - Google Patents
Rectangular waveguide TE10Circular waveguide polarization tunable TE11Mode converter Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention discloses a rectangular waveguide TE 10 -circular waveguide polarization adjustable TE 11 mode converter, and belongs to the technical field of high-power microwave transmission and emission. The mode converter is formed by sequentially connecting a rectangular-circular transition, a first circular polarizer, a second circular polarizer and a circular waveguide; the rectangular circular transition and the circular waveguide are fixed, the 2 circular polarizers are circular waveguide wires-circular polarization converters and are similar in structure, the 2 circular polarizers can rotate around the central axis, and the mode converter can realize horizontal polarization, vertical polarization, left-hand circular polarization and right-hand circular polarization TE 11 mode output by respectively rotating the two circular polarizers to different angles; the rectangular waveguide TE 10 -circular waveguide polarization-adjustable TE 11 mode converter can generate four different polarization modes of microwave output, and has the advantages of compact structure, convenient polarization adjustment and high power capacity, and meets the application requirements of the high-power microwave field.
Description
Technical Field
The invention belongs to the technical field of high-power microwave transmission and emission, and particularly relates to a rectangular waveguide TE 10 -circular waveguide polarization-adjustable TE 11 mode converter.
Background
In order to facilitate the multiplexing of high-power microwaves, the mode TM 01 outputted by the high-power microwave generating device can be converted into the mode TE 10 of the rectangular waveguide. In actual radiation, the rectangular waveguide TE 10 mode is converted into a mode with more concentrated energy and stronger directivity, such as a circular waveguide TE 11 mode. Typical rectangular waveguide TE 10 -circular waveguide TE 11 mode converters at present are rectangular waveguide TE 10 -circular waveguide linear polarization TE 11 mode converters based on rectangular-circular transition structures, rectangular waveguide TE 10 -circular waveguide circular polarization TE 11 mode converters based on waveguide coupling and phase shifting structures (refer to patent document: a rectangular waveguide TE 10 mode-to-circular waveguide rotation TE 11 mode converter, application number: 202111018869.5), rectangular waveguide TE 10 -circular waveguide circular polarization TE 11 mode converters based on rectangular-circular transition and circular waveguide interpolation metal screw cascade structures (refer to document: wang Youzhen and the like. Design and experiment [ J ]. Electronic measurement technology of X-band circular polarization antennas, 2010,33 (2), pp.26-28) and the like. These mode converters are mature in technology and high in conversion efficiency, but can only output a TE 11 mode with linear polarization or circular polarization without exception. In the research of high-power microwave effect and protection test, in order to explore the effect threshold of a large-size target in different electric field polarization modes, a microwave source is required to generate high-power microwave radiation fields in four different polarization modes of horizontal polarization, vertical polarization, left-hand circular polarization and right-hand circular polarization, but the existing mode converters cannot meet the application requirements of generating microwave output in four different polarization modes.
Disclosure of Invention
The invention aims to provide a rectangular waveguide TE 10 -circular waveguide polarization-adjustable TE 11 mode converter, which solves the problem that the existing rectangular waveguide TE 10 -circular waveguide TE 11 mode converter cannot meet the application requirements of generating four different polarization modes of microwave output. The mode converter provided by the invention can output microwaves in four different polarization modes of horizontal polarization, vertical polarization, left-hand circular polarization and right-hand circular polarization, and has the advantages of compact structure, convenience in polarization adjustment and high power capacity, and meets the application requirements in the field of high-power microwaves.
In order to achieve the above purpose, the present invention provides a rectangular waveguide TE 10 -circular waveguide polarization adjustable TE 11 mode converter, which is formed by sequentially connecting a rectangular-circular transition, a first circular polarizer, a second circular polarizer and a circular waveguide;
the rectangular circular transition and the circular waveguide are fixed, the 2 circular polarizers are circular waveguide wires-circular polarization converters and are similar in structure, the 2 circular polarizers can rotate around the central axis, and the mode converter can realize horizontal polarization, vertical polarization, left-hand circular polarization and right-hand circular polarization TE 11 mode output by respectively rotating the two circular polarizers to different angles;
The rectangular-circular transition consists of 1 rectangular waveguide, 1 rectangular-circular transition section and 1 circular waveguide flange, and is used for converting a rectangular waveguide input TE 10 mode into a circular waveguide linear polarization TE 11 mode and outputting;
The first circular polarizer consists of 1 circular waveguide, rectangular resonant cavities protruding from two sides of the 1 circular waveguide and 2 circular waveguide flanges, wherein the first circular polarizer 2 is symmetrical along the center of the central axis, the 2 circular waveguide flanges are respectively positioned at the input port and the output port, the inner side of the circular waveguide flange of the input port is provided with a cylindrical groove, and the size of the cylindrical groove is the same as that of a metal cylinder at the outer side of the circular waveguide flange in rectangular-circular transition; the outer side of the circular waveguide flange of the output port is connected with a section of metal cylinder, the size of the metal cylinder is equal to that of the circular waveguide flange groove of the input port of the second circular polarizer, and the metal cylinder plays a supporting role when the second circular polarizer is rotated;
the second circular polarizer 2 consists of 1 circular waveguide, 1 rectangular resonant cavity with two raised sides of the circular waveguide and 2 circular waveguide flanges, wherein the inner sides of the circular waveguide flanges of the input/output ports of the second circular polarizer 2 are respectively provided with a cylindrical groove, and the size of the cylindrical grooves is the same as that of the metal cylinder outside the circular waveguide flange of the output port of the first circular polarizer 2;
The outer side of the circular waveguide flange of the circular waveguide input port is provided with a section of metal cylinder, the size of the metal cylinder is the same as that of the circular waveguide flange groove of the output port of the second circular polarizer, and the metal cylinder plays a supporting role in rotating the second circular polarizer.
Further, when the first circular polarizer rotates 45 degrees, the rectangular resonant cavity of the first circular polarizer forms an angle of 45 degrees with the x-axis, an input vertical polarization TE 11 mode can be divided into two electric field components E 1 and E 2 with equal amplitude and orthogonal, and the two electric fields in two directions can be different in phase by 90 degrees by adjusting the length of the rectangular resonant cavity of the first circular polarizer, and a left-hand circular polarization TE 11 mode is output; the first circular polarizer rotates 135 degrees, and when the included angle alpha between the rectangular resonant cavity of the first circular polarizer and the x-axis is 135 degrees, a right-handed circular polarization TE 11 mode can be output; when the rectangular resonant cavity of the first circular polarizer forms an included angle alpha of 0 DEG with the x-axis, the first circular polarizer keeps vertical polarization TE 11 mode output.
Further, for the input of a left-hand circular polarization TE 11 mode, the second circular polarizer rotates 45 degrees, the rectangular resonant cavity of the second circular polarizer forms an angle of 45 degrees with the x-axis, and the second circular polarizer can convert the left-hand circular polarization TE 11 mode into a horizontal polarization TE 11 mode for output; the second circular polarizer rotates for 135 degrees, and when the rectangular resonant cavity of the second circular polarizer forms 135 degrees with the x-axis clamping angle, the second circular polarizer can convert a left-hand circular polarization TE 11 mode into a vertical polarization TE 11 mode for output;
For right-hand circular polarization TE 11 mode input, the second circular polarizer rotates 45 degrees, and when the rectangular resonant cavity of the second circular polarizer forms 45 degrees with the x-axis clamping angle, the second circular polarizer can convert the right-hand circular polarization TE 11 mode into vertical polarization TE 11 mode output; the second circular polarizer rotates by 135 degrees, the rectangular resonant cavity of the second circular polarizer forms 135 degrees with the x-axis clamping angle, and the second circular polarizer can convert a right-hand circular polarization TE 11 mode into a horizontal polarization TE 11 mode and output the right-hand circular polarization TE 11 mode;
For the vertical polarization TE 11 mode input, when the rectangular resonant cavity of the second circular polarizer forms 0 degrees with the x-axis clamping angle, the second circular polarizer 2 keeps the vertical polarization TE 11 mode output; when the rectangular resonant cavity of the second circular polarizer 2 forms an angle of 45 degrees with the x-axis, the second circular polarizer can convert a vertical polarization TE 11 mode into a left-hand circular polarization TE 11 mode for output; when the rectangular resonant cavity of the second circular polarizer 2 forms 135 degrees with the x-axis, the second circular polarizer 2 can convert the vertical polarization TE 11 mode into the right-hand circular polarization TE 11 mode for output.
Furthermore, in order to facilitate connection with other waveguide devices of the microwave system, the rectangular waveguide adopts a standard rectangular waveguide corresponding to the microwave working frequency band.
Furthermore, the inner diameters of the rectangular-circular transition section and other circular waveguides in the mode converter are standard circular waveguide inner diameters corresponding to the microwave working frequency range.
Further, the outer side of the circular waveguide flange of the rectangular-circular transition is connected with a section of metal cylinder, the cylinder size is the same as the size of the circular waveguide flange groove of the input port of the first circular polarizer, when the rectangular-circular transition is connected with the first circular polarizer, the metal cylinder can be attached to the groove, and the metal cylinder plays a supporting role when the first circular polarizer is rotated.
Further, the thickness, height and distance from the input port of the rectangular resonant cavity affect the reflection coefficient of the first circular polarizer, and high transmission efficiency can be achieved by optimizing the parameters of the rectangular resonant cavity.
Furthermore, in order to facilitate direct connection with other circular waveguide devices of the microwave system, the circular waveguide flange of the circular waveguide output port is a standard circular waveguide flange.
Compared with the prior art, the invention has the following beneficial effects:
1. The rectangular waveguide TE 10 -circular waveguide polarization adjustable TE 11 mode converter realizes mode conversion from a rectangular waveguide TE 10 mode to a circular waveguide TE 11 mode, and can realize horizontal polarization, vertical polarization, left-hand circular polarization and right-hand circular polarization TE 11 mode output by rotating two line-circular polarization converters of the mode converter, namely, the mode conversion from a rectangular waveguide TE 10 mode to four polarization modes TE 11 mode is realized by using one mode converter. Meanwhile, the mode converter can keep higher power transmission efficiency when outputting four polarization modes TE 11 modes.
2. The rectangular waveguide TE 10 -circular waveguide polarization-adjustable TE 11 mode converter is compact in structure, convenient to adjust polarization and high in power capacity.
Drawings
FIG. 1 is a schematic diagram of a rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter according to the present invention;
FIG. 2 is an exploded view of a rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter of the present invention;
FIG. 3 is a schematic diagram of a rectangular-circular transition 1;
FIG. 4 is a schematic diagram of the structure of a first circular polarizer 2 according to the present invention;
FIG. 5 is a schematic diagram of the structure of a second circular polarizer 3 according to the present invention;
FIG. 6 is a schematic view of the circular waveguide 4 of the present invention;
1-moment circular transition, 2-first circular polarizer, 3-second circular polarizer, 4-circular waveguide
Detailed Description
The technical scheme of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1 and 2, the rectangular waveguide polarization rotator consists of 1 rectangular-circular transition, 2 circular waveguide wire-circular polarization converters with similar structures, namely circular polarizers and 1 circular waveguide. Wherein the rectangular-circular transition 1 and the circular waveguide 4 are fixed, and the 2 circular polarizers can rotate around the central axis. The mode converter can realize horizontal polarization, vertical polarization, left-hand circular polarization and right-hand circular polarization TE 11 mode output by rotating the two circular polarizers to a certain angle respectively.
As shown in fig. 3, the rectangular-circular transition 1 is composed of 1 rectangular waveguide, 1 rectangular-circular transition section and 1 circular waveguide flange, and is mainly used for converting the rectangular waveguide input TE 10 mode into circular waveguide linear polarization (vertical polarization, that is, the polarization direction is parallel to the y-axis) TE 11 mode output. For convenience in connection with other waveguide devices of the microwave system, the rectangular waveguide may be a standard rectangular waveguide corresponding to the microwave operating frequency band. Likewise, the inner diameter r 0 of the rectangular-circular transition section and other circular waveguides in the mode converter can be standard circular waveguide inner diameters corresponding to the microwave working frequency band, and the length of the rectangular-circular transition section is l 0. The thickness of the rectangular-circular transition 1 circular waveguide flange is e 1, a section of metal cylinder is connected to the outer side of the circular waveguide flange, the length of the metal cylinder is t 0, and the thickness of the metal cylinder is e 0. The cylinder size is the same as the circular waveguide flange groove size of the input port of the first circular polarizer 2. Therefore, when the rectangular-circular transition 1 is connected with the first circular polarizer 2, the metal cylinder can be attached to the groove. The metal cylinder plays a supporting role when the first circular polarizer 2 is rotated.
As shown in fig. 4, the first circular polarizer 2 is composed of 1 circular waveguide, 1 rectangular resonant cavity protruding from two sides of the circular waveguide, and 2 circular waveguide flanges. The first circular polarizer 2 is centrally symmetric along the central axis. The 2 circular waveguide flanges are respectively positioned at the input port and the output port, wherein a cylindrical groove is arranged on the inner side of the circular waveguide flange of the input port, and the size of the cylindrical groove is the same as that of the metal cylinder on the outer side of the rectangular-circular transition 1 circular waveguide flange. The outer side of the circular waveguide flange of the output port is connected with a section of metal cylinder, the size of the metal cylinder is equal to that of the circular waveguide flange groove of the input port of the second circular polarizer 3, and the metal cylinder also plays a supporting role when the second circular polarizer 3 is rotated.
The output polarization mode of the first circular polarizer 2 can be adjusted by rotating the first circular polarizer. For example, when the angle alpha between the rectangular resonant cavity of the first circular polarizer 2 and the x-axis (the x-axis is parallel to the narrow side of the rectangular waveguide of the rectangular transition 1) is 45 DEG
When the first circular polarizer 2 rotates by 45 degrees, the input vertical polarization TE 11 mode can be divided into two electric field components E 1 and E 2 with equal amplitude and orthogonal, the respective electric field directions are along the rectangular resonant cavity direction and perpendicular to the rectangular resonant cavity direction, and the electric field propagation constants in the two directions are different due to the different cavity structures in the two directions, and the electric field propagation constant in the direction perpendicular to the rectangular resonant cavity direction is larger than the electric field propagation constant along the rectangular resonant cavity direction. By properly adjusting the length l 1 of the rectangular resonant cavity, the phase difference of electric fields in two directions can be 90 degrees, and a left-hand circularly polarized TE 11 mode is output; similarly, when the included angle alpha between the rectangular resonant cavity of the first circular polarizer 2 and the x-axis is 135 degrees, a right-hand circular polarization TE 11 mode can be output; when the included angle alpha between the rectangular resonant cavity of the first circular polarizer 2 and the x-axis is 0 degrees, the rectangular resonant cavity has little influence on the input vertical polarization TE 11 mode, so that the first circular polarizer 2 keeps the vertical polarization TE 11 mode output.
In summary, by rotating the first circular polarizer 2 to a certain angle, the vertical polarization and the circular polarization TE 11 modes can be output, respectively. Parameters such as the rectangular cavity thickness w 1, the height h 1 and the distance d 1+e1+t0 from the input port mainly affect the reflection coefficient of the first circular polarizer 2, i.e. high power transmission efficiency can be achieved by optimizing these parameters.
As shown in fig. 5, the second circular polarizer 3 is similar to the first circular polarizer 2 in structure, and is also composed of 1 circular waveguide, 1 rectangular resonant cavity protruding from two sides of the circular waveguide, and 2 circular waveguide flanges. However, the inner sides of the circular waveguide flanges of the input/output ports of the second circular polarizer 3 are provided with a cylindrical groove, and the size of the cylindrical groove is the same as that of the metal cylinder outside the circular waveguide flange of the output port of the first circular polarizer 2. The second circular polarizer 3 has a circular waveguide inner diameter r 0, a rectangular cavity thickness w 2, a length l 2, a height h 2 and a distance d 2+e1+t0 from the input port.
Similarly, turning the second circular polarizer 3 also plays a role in output polarization adjustment. According to the principle of passive microwave network reciprocity, for the input of a left-hand circular polarization TE 11 mode, when a rectangular resonant cavity of the second circular polarizer 3 forms an angle of 45 degrees with an x-axis clamping angle beta (the second circular polarizer 3 rotates by 45 degrees), the second circular polarizer 3 can convert the left-hand circular polarization TE 11 mode into a horizontal polarization TE 11 mode for output; when the rectangular resonant cavity of the second circular polarizer 3 forms 135 degrees with the x-axis, the second circular polarizer 3 can convert the left-hand circular polarization TE 11 mode into the vertical polarization TE 11 mode for output.
For right-hand circular polarization TE 11 mode input, when the rectangular resonant cavity of the second circular polarizer 3 forms 45 degrees with the x-axis clamping angle, the second circular polarizer 3 can convert the right-hand circular polarization TE 11 mode into vertical polarization TE 11 mode output; when the rectangular resonant cavity of the second circular polarizer 3 forms 135 degrees with the x-axis, the second circular polarizer 3 can convert the right-hand circular polarization TE 11 mode into the horizontal polarization TE 11 mode for output.
For vertical polarization TE 11 mode input, when the angle between the rectangular resonant cavity of the second circular polarizer 3 and the x-axis is 0 degrees, the rectangular resonant cavity of the second circular polarizer 3 has little influence on inputting the vertical polarization TE 11 mode, and the second circular polarizer 3 keeps outputting the vertical polarization TE 11 mode; when the rectangular resonant cavity of the second circular polarizer 3 forms an angle of 45 degrees with the x-axis, the second circular polarizer 3 can convert a vertical polarization TE 11 mode into a left-hand circular polarization TE 11 mode for output; when the rectangular resonant cavity of the second circular polarizer 3 forms 135 degrees with the x-axis, the second circular polarizer 3 can convert the vertical polarization TE 11 mode into the right-hand circular polarization TE 11 mode for output.
As shown in fig. 6, a section of metal cylinder is connected to the outer side of the circular waveguide flange of the input port of the circular waveguide 4, and the dimension of the metal cylinder is the same as that of the circular waveguide flange groove of the output port of the second circular polarizer 3, so that the metal cylinder plays a supporting role in rotating the second circular polarizer 3. Meanwhile, in order to facilitate direct connection with other circular waveguide devices (such as circular waveguide horn antennas and the like) of the microwave system, the circular waveguide flange of the output port of the circular waveguide 4 can be a standard circular waveguide flange. The circular waveguide 4 mainly plays a role of connection transition, the inner diameter of the circular waveguide is also r 0, and the cavity length is l 3.
In summary, typical tuning schemes for the mode polarization of the mode converter output TE 11 are shown in table 1.
TABLE 1
| Sequence number | α(°) | β(°) | Output TE 11 mode polarization |
| 1 | 0 | 45 | Left-hand circular polarization |
| 2 | 0 | 135 | Right hand circular polarization |
| 3 | 45 | 45 | Horizontal polarization |
| 4 | 45 | 135 | Vertical polarization |
The embodiment also exemplarily provides specific implementation structural parameters of the rectangular waveguide TE 10 -circular waveguide polarization-adjustable TE 11 mode converter:
for example, an X-band rectangular waveguide TE 10 -circular waveguide polarization-tunable TE 11 mode converter with a center frequency point of 9.3GHz is designed. According to the working frequency band, the input rectangular waveguide size of the rectangular-circular transition 1 is selected to be 22.86mm multiplied BY 10.16mm (BJ 100 standard rectangular waveguide), and the circular waveguide inner diameter r 0 is 11.9125mm (BY 89 standard circular waveguide inner diameter). The main parameters of the mode converter after simulation optimization are shown in table 2.
TABLE 2
| Structural parameters | l0 | e0 | e1 | t0 | d1 | h1 | l1 | w1 | d2 | h2 | l2 | w2 | l3 |
| Size (mm) | 48 | 1.5 | 2 | 5 | 10 | 8.7 | 38 | 3.2 | 9 | 8.7 | 38.3 | 3.35 | 20 |
Under different regulation schemes, continuous wave signals with the frequency of 9.3GHz and the peak power of 1W are injected into the input port of the mode converter, and the transmission characteristic simulation results are shown in table 3.
TABLE 3 Table 3
As can be seen from Table 3, the mode converter has reflection losses of less than-32 dB at 9.3GHz, and the amplitude difference between the two degenerate modes is less than 0.1dB when outputting a circularly polarized TE 11 mode. The maximum field strength in the mode converter cavity is about 4565V/m under different regulation schemes. And according to Kilpatrick criterion, the electric field breakdown threshold of the 9.3GHz microwave signal in the vacuum state is about 79.4MV/m, so that the power capacity of the mode converter in the vacuum pumping state is about 302.5MW. The simulation result shows that the mode converter not only can realize TE 11 mode output in four polarization modes, but also has higher power transmission efficiency and power capacity, and meets the application requirements in the field of high-power microwaves.
The above is only one preferred embodiment of the present invention, and it should be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as the scope of the invention.
Claims (8)
1. A rectangular waveguide TE 10 -circular waveguide polarization adjustable TE 11 mode converter is formed by sequentially connecting a rectangular-circular transition, a first circular polarizer, a second circular polarizer and a circular waveguide;
The method is characterized in that: the rectangular-circular transition and the circular waveguide are fixed, the 2 circular polarizers are circular waveguide wires-circular polarization converters and are similar in structure, the 2 circular polarizers can rotate around the central axis respectively, and the mode converter realizes horizontal polarization, vertical polarization, left-hand circular polarization and right-hand circular polarization TE 11 mode output by rotating the two circular polarizers to different angles respectively;
The rectangular-circular transition consists of 1 rectangular waveguide, 1 rectangular-circular transition section and 1 circular waveguide flange, and is used for converting a rectangular waveguide input TE 10 mode into a circular waveguide linear polarization TE 11 mode and outputting;
The first circular polarizer consists of 1 circular waveguide, rectangular resonant cavities protruding from two sides of the 1 circular waveguide and 2 circular waveguide flanges, the first circular polarizer is symmetrical along the center of the central axis, the 2 circular waveguide flanges are respectively positioned at the input port and the output port, wherein a cylindrical groove is formed in the inner side of the circular waveguide flange of the input port, and the size of the cylindrical groove is the same as that of a metal cylinder on the outer side of the circular waveguide flange in rectangular-circular transition; the outer side of the circular waveguide flange of the output port is connected with a section of metal cylinder, the size of the metal cylinder is equal to that of the circular waveguide flange groove of the input port of the second circular polarizer, and the metal cylinder plays a supporting role when the second circular polarizer is rotated;
the second circular polarizer consists of 1 circular waveguide, rectangular resonant cavities protruding from two sides of the 1 circular waveguide and 2 circular waveguide flanges, wherein the inner sides of the circular waveguide flanges of the input/output ports of the second circular polarizer are respectively provided with a cylindrical groove, and the size of the cylindrical grooves is the same as that of the metal cylinder outside the circular waveguide flange of the output port of the first circular polarizer;
The outer side of the circular waveguide flange of the circular waveguide input port is connected with a section of metal cylinder, the size of the metal cylinder is the same as that of the circular waveguide flange groove of the output port of the second circular polarizer, and the metal cylinder plays a supporting role in rotating the second circular polarizer.
2. The rectangular waveguide TE 10 -circular waveguide polarization adjustable TE 11 mode converter according to claim 1, wherein when the first circular polarizer rotates 45 ° and the rectangular resonant cavity of the first circular polarizer forms an angle of 45 ° with the x-axis, the input vertical polarization TE 11 mode can be divided into two equal-amplitude orthogonal electric field components E 1 and E 2, and by adjusting the length of the rectangular resonant cavity of the first circular polarizer, the two directions of electric fields can be separated by 90 ° in phase, and a left-hand circular polarization TE 11 mode can be output; the first circular polarizer rotates 135 degrees, and when the included angle alpha between the rectangular resonant cavity of the first circular polarizer and the x-axis is 135 degrees, a right-handed circular polarization TE 11 mode can be output; when the rectangular resonant cavity of the first circular polarizer forms an included angle alpha of 0 DEG with the x-axis, the first circular polarizer keeps vertical polarization TE 11 mode output.
3. A rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter according to claim 1, wherein:
For the input of a left-hand circular polarization TE 11 mode, the second circular polarizer rotates for 45 degrees, the rectangular resonant cavity of the second circular polarizer forms an angle of 45 degrees with the x-axis, and the second circular polarizer can convert the left-hand circular polarization TE 11 mode into a horizontal polarization TE 11 mode for output; the second circular polarizer rotates for 135 degrees, and when the rectangular resonant cavity of the second circular polarizer forms 135 degrees with the x-axis clamping angle, the second circular polarizer can convert a left-hand circular polarization TE 11 mode into a vertical polarization TE 11 mode for output;
For right-hand circular polarization TE 11 mode input, the second circular polarizer rotates 45 degrees, and when the rectangular resonant cavity of the second circular polarizer forms 45 degrees with the x-axis clamping angle, the second circular polarizer can convert the right-hand circular polarization TE 11 mode into vertical polarization TE 11 mode output; the second circular polarizer rotates by 135 degrees, the rectangular resonant cavity of the second circular polarizer forms 135 degrees with the x-axis clamping angle, and the second circular polarizer can convert a right-hand circular polarization TE 11 mode into a horizontal polarization TE 11 mode and output the right-hand circular polarization TE 11 mode;
For the vertical polarization TE 11 mode input, when the rectangular resonant cavity of the second circular polarizer forms 0 degrees with the x-axis clamping angle, the second circular polarizer keeps the vertical polarization TE 11 mode output; when the rectangular resonant cavity of the second circular polarizer forms an angle of 45 degrees with the x-axis, the second circular polarizer can convert a vertical polarization TE 11 mode into a left-hand circular polarization TE 11 mode and output the mode; when the rectangular resonant cavity of the second circular polarizer forms 135 degrees with the x-axis clamping angle, the second circular polarizer can convert the vertical polarization TE 11 mode into the right-hand circular polarization TE 11 mode for output.
4. A rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter according to any one of claims 1-3, characterized by: in order to facilitate connection with other waveguide devices of the microwave system, the rectangular waveguide adopts a standard rectangular waveguide corresponding to the microwave working frequency band.
5. A rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter according to any one of claims 1-3, characterized by: the inner diameters of the rectangular-circular transition section and other circular waveguides in the mode converter are standard circular waveguide inner diameters corresponding to the microwave working frequency range.
6. A rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter according to any one of claims 1-3, characterized by: the outer side of the circular waveguide flange of the rectangular-circular transition is connected with a section of metal cylinder, the cylinder size is the same as the size of the circular waveguide flange groove of the input port of the first circular polarizer, when the rectangular-circular transition is connected with the first circular polarizer, the metal cylinder can be attached to the groove, and the metal cylinder plays a supporting role when the first circular polarizer is rotated.
7. A rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter according to any one of claims 1-3, characterized by: the thickness, the height and the distance from the input port of the rectangular resonant cavity can influence the reflection coefficient of the first circular polarizer, and high transmission efficiency can be realized by optimizing the parameters of the rectangular resonant cavity.
8. A rectangular waveguide TE 10 -circular waveguide polarization tunable TE 11 mode converter according to any one of claims 1-3, characterized by: in order to facilitate direct connection with other circular waveguide devices of the microwave system, the circular waveguide flange of the circular waveguide output port is a standard circular waveguide flange.
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| CN102377000A (en) * | 2010-08-11 | 2012-03-14 | 中国科学院电子学研究所 | High-frequency conversion structure with rectangular-circular mode |
| CN106684546A (en) * | 2016-12-26 | 2017-05-17 | 上海交通大学 | C-band polarization-reconfigurable microstrip planar array antenna |
| CN107369911A (en) * | 2017-09-15 | 2017-11-21 | 中国人民解放军国防科技大学 | High-power microwave mode conversion horn antenna |
| CN107645058A (en) * | 2017-09-15 | 2018-01-30 | 中国人民解放军国防科技大学 | High-power microwave radial line mode conversion slot antenna |
| CN110011003A (en) * | 2019-01-30 | 2019-07-12 | 中国人民解放军63653部队 | A kind of circular waveguide TM01-Polarize adjustable TE11 mode converter |
| CN114826174A (en) * | 2022-04-25 | 2022-07-29 | 中国电子科技集团公司第二十九研究所 | Microwave power amplifier capable of realizing polarization mode selection |
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2023
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| CN101728600A (en) * | 2008-10-28 | 2010-06-09 | 西安恒达微波技术开发公司 | Waveguide high-power polarized state change-over switch |
| CN102377000A (en) * | 2010-08-11 | 2012-03-14 | 中国科学院电子学研究所 | High-frequency conversion structure with rectangular-circular mode |
| CN106684546A (en) * | 2016-12-26 | 2017-05-17 | 上海交通大学 | C-band polarization-reconfigurable microstrip planar array antenna |
| CN107369911A (en) * | 2017-09-15 | 2017-11-21 | 中国人民解放军国防科技大学 | High-power microwave mode conversion horn antenna |
| CN107645058A (en) * | 2017-09-15 | 2018-01-30 | 中国人民解放军国防科技大学 | High-power microwave radial line mode conversion slot antenna |
| CN110011003A (en) * | 2019-01-30 | 2019-07-12 | 中国人民解放军63653部队 | A kind of circular waveguide TM01-Polarize adjustable TE11 mode converter |
| CN114826174A (en) * | 2022-04-25 | 2022-07-29 | 中国电子科技集团公司第二十九研究所 | Microwave power amplifier capable of realizing polarization mode selection |
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