CN111129687A - High-isolation microwave mode converter and design method thereof - Google Patents
High-isolation microwave mode converter and design method thereof Download PDFInfo
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- CN111129687A CN111129687A CN201911246281.8A CN201911246281A CN111129687A CN 111129687 A CN111129687 A CN 111129687A CN 201911246281 A CN201911246281 A CN 201911246281A CN 111129687 A CN111129687 A CN 111129687A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
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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
Abstract
A design method of a high-isolation microwave mode converter comprises the following steps: 1) the first end of the waveguide cylindrical cavity is coupled with the common circular waveguide port, the second end of the waveguide cylindrical cavity is coupled with the BJ84 waveguide transmitting port, and the waveguide cylindrical cavity is coupled with the receiving waveguide part; 2) a coupling slit is formed in the top surface of the cylindrical cavity, the cylindrical cavity is coupled with the BJ84 waveguide receiving port through the coupling slit, and a TE11 mode in the common circular waveguide port is converted into a TE01 mode through coupling of the coupling slit; 3) designing a waveguide transmission line with waveguide cut-off attenuation characteristics, and connecting the waveguide transmission line between the cylindrical cavity and the BJ84 waveguide emission port; 4) obtaining the whole structure of the transmitting channel under the optimal structure by adjusting the waveguide transmission line; 5) adjusting the structure of the receiving channel: an impedance transformation step is arranged in the cuboid cavity of the receiving waveguide part. The invention has simple structure, convenient processing, almost negligible influence of assembly on performance indexes, high cost performance and excellent technical indexes.
Description
Technical Field
The invention belongs to the technical field of microwave satellite communication feeders or radars, and particularly relates to a high-isolation microwave mode converter and a design method thereof.
Background
With the continuous development of information technology, the demand for convenience and high speed of communication modes is higher and higher, and the microwave satellite communication technology is a communication form for solving the demand. In microwave communication, high isolation of a feeder line part of an antenna is an important index, and if the isolation of the feeder line is not high, self-interference is generated in communication, so that the communication quality is seriously reduced. Therefore, the role of the high-isolation microwave mode converter in the satellite communication system is very important. The traditional microwave mode converter has unsatisfactory places in the aspects of structure, index, performance and the like. This requires a new high-isolation microwave mode converter which meets the high requirements of the equipment, and the high-isolation microwave mode converter is produced under the requirements.
Disclosure of Invention
The invention aims to realize a high-isolation microwave mode converter. Aiming at the high requirements of the existing satellite communication system, the microwave satellite communication system has the outstanding advantages of simple structure, low processing complexity, small influence of assembly errors on technical indexes and the like, and meanwhile, due to the fact that the microwave satellite communication system is simple in structure, production efficiency is improved, reliability of devices is greatly improved, the microwave satellite communication system can effectively meet the relevant requirements of the microwave satellite communication system, and the microwave satellite communication system has wide application prospects.
The invention provides a high-isolation double-frequency microwave mode converter, and belongs to the field of microwave satellite communication. The technical problems that a high-isolation microwave mode converter is complex in design structure, high in processing difficulty, and the performance of a product is affected by structural assembly errors are mainly solved.
A design method of a high-isolation microwave mode converter comprises the following steps:
1-designing a waveguide structure as a closed cylindrical cavity;
the first end of the cylindrical cavity is coupled with a common circular waveguide port 6, the second end of the cylindrical cavity is coupled with a standard BJ84 waveguide emission port 2, and the cylindrical cavity is coupled with a receiving waveguide part 7;
2-design of the coupling structure of the cavity and the receiving waveguide part 7:
the reception waveguide portion 7 includes a rectangular parallelepiped cavity; the top end of the cuboid cavity is connected with a standard BJ84 waveguide receiving port 8, and the interior of the cuboid cavity is coupled with a standard BJ84 waveguide receiving port 8;
the top surface of the cylindrical cavity is provided with a coupling slit 4, the bottom end of the cuboid cavity is detachably connected to the top surface of the cavity, the coupling slit 4 is arranged in the range of the bottom surface of the cuboid cavity, so that the cylindrical cavity is coupled 8 with a standard BJ84 waveguide receiving port through the coupling slit, and a TE11 mode in the common circular waveguide port 6 is converted into a TE01 mode through the coupling slit 4;
3-design of the coupling structure of the cylindrical cavity to the standard BJ84 waveguide launch port 2:
a waveguide transmission line 3 with waveguide cut-off attenuation characteristics is designed at the second end of the cylindrical cavity, the waveguide transmission line 3 is connected between the cylindrical cavity and the standard BJ84 waveguide transmitting port 2, and a common circular waveguide port 6, the standard BJ84 waveguide transmitting port 2 and the standard BJ84 waveguide receiving port are coupled 8;
4-adjusting the structure of the emission channel 1:
the wide edge and the narrow edge of a waveguide (the waveguide is formed by a rectangular cavity) between the second end of the cylindrical cavity and the BJ84 waveguide launching port 2 are adjusted through a waveguide transmission line 3, and the length of the waveguide transmission line 3 is adjusted at the same time, so that the whole structure of a launching channel 1 under the optimal structure is obtained;
5-adjusting the structure of the receiving channel:
an impedance transformation step 9 is arranged in the cuboid cavity of the receiving waveguide part 7; the structure requirement of the impedance transformation step 9 is that the width of the impedance transformation step 9 is the same as the width of a waveguide formed by a cuboid cavity, and the length of the impedance transformation step 9 corresponds to the wavelength;
the impedance transformation step 9 is arranged on the wide side of the waveguide formed by the cuboid cavity, and impedance is matched by changing the size of the narrow side of the waveguide formed by the cuboid cavity;
the number of stages of the impedance conversion step 9 is set according to the receiving end frequency range.
Further:
a groove-shaped structure 5 is designed around the coupling seam 4; the shape enclosed by the groove-shaped structure 5 is the same as the radial section of the cuboid cavity; the bottom of the side wall of the cuboid-shaped cavity extends into the groove-shaped structure 5.
Four corners of the radial section of the cuboid cavity are rounded corners.
The relation between the number of stages of the impedance transformation step 9 and the frequency range is: the wider the frequency range, the more number of steps are used.
The length of the impedance transformation step 9 is a quarter wavelength.
The high-isolation microwave mode converter designed by the method structurally comprises a waveguide, a transmitting channel and a receiving channel;
the waveguide is a closed cylindrical cavity; the first end of the cylindrical cavity is coupled with a common circular waveguide port 6;
the transmitting channel comprises a standard BJ84 waveguide transmitting port 2;
the receiving channel comprises a cuboid cavity, and a standard BJ84 waveguide receiving port 8 is coupled to the top end of the cuboid cavity; an impedance transformation step 9 is arranged in the cuboid cavity;
a waveguide transmission line 3 with waveguide cut-off attenuation characteristics is arranged between the second end of the cylindrical cavity and the standard BJ84 waveguide emission port 2;
the top end of the cylindrical cavity is provided with a coupling slit 4; the bottom end of the cuboid cavity is connected with the outer wall of the cylindrical cavity, and the coupling seam 4 projects in the cuboid cavity into the model of the outer wall of the cylindrical cavity; the TE11 mode coupling in the common circular waveguide port 6 is converted into a TE01 mode by the coupling slot 4;
the width of the impedance transformation step 9 is the same as the size of the wide side of the waveguide formed by the cuboid cavity, and the length of the impedance transformation step 9 corresponds to the wavelength;
the impedance transformation step 9 is arranged on the wide side of the waveguide formed by the cuboid cavity, and impedance is matched by changing the size of the narrow side of the waveguide formed by the cuboid cavity;
the number of stages of the impedance conversion step 9 is set according to the receiving end frequency range.
Further:
a groove-shaped structure 5 is formed on the outer wall of the cylindrical cavity, and the coupling seam 4 is arranged in an area enclosed by the groove-shaped structure 5;
the bottom of the side wall of the cuboid cavity extends into the groove of the groove-shaped structure 5 and is closely attached to the inner wall of the groove.
Four corners of the radial section of the cuboid cavity are rounded corners.
The relation between the number of stages of the impedance transformation step 9 and the frequency range is: the wider the frequency range, the more number of steps are used.
The length of the impedance transformation step 9 is a quarter wavelength.
The principle and the design idea of the technical scheme are as follows:
the high-isolation microwave mode converter comprises a common circular waveguide port, a standard BJ84 waveguide transmitting port, a standard BJ84 waveguide receiving port and a waveguide transmission line with waveguide cut-off attenuation characteristic, wherein the waveguide transmission line effectively improves the isolation of the dual-frequency microwave mode converter, plays a decisive role in the isolation of the microwave mode converter, and simultaneously performs mode conversion from a main mode TE11 of the circular waveguide to key parts of main modes TE10 and TE01 of other two standard BJ84 waveguides, the waveguide transmission line with waveguide cut-off attenuation characteristic in the cavity mainly has the structural form that wide-side and narrow-side deformation of the waveguide is performed on the basis of the standard waveguide, the main change trend is reduced, according to the electromagnetic field theory, the main mode frequency in the corresponding working frequency range is also continuously improved, so that the low-end frequency of the waveguide originally in the frequency range generates great attenuation, if the frequency range of the dual-band antenna is selected to work in a high frequency band, the mutual isolation between the dual-band antenna and the dual-band antenna is greatly improved.
By utilizing the characteristics at the transmitting end, firstly, a waveguide transmission line with waveguide cut-off attenuation characteristics is added between a standard BJ84 waveguide transmitting port and a round common waveguide port, and the waveguide transmission line with the waveguide cut-off attenuation characteristics with a proper structure, which has better standing-wave ratio, low insertion loss, larger attenuation to the low end and transformation of the TE11 mode of the round waveguide into the TE10 mode, can be obtained in the high-end frequency range by properly optimizing the wide side and the narrow side of the waveguide and the length of the waveguide transmission line. Thus, an overall structure of the transmitting channel consisting of the circular waveguide, the waveguide transmission line with the cut-off attenuation characteristic and the standard waveguide is formed, and the transmitting channel has the characteristic of very simple structure under the condition of realizing the requirements of related indexes.
At a receiving end, a long slit type small hole is formed in a circular waveguide, a TE11 mode in the circular waveguide is converted into a TE01 mode through small hole coupling, in order to match the frequency of a low frequency band, an impedance conversion step needs to be arranged in a standard waveguide, the step is usually arranged on a wide edge, the purpose of impedance matching is achieved by changing the size of the narrow edge, and the number of the steps is selected according to the frequency range of the receiving end. A groove may be provided around the coupling hole to facilitate the structure of the receiving waveguide portion. Through the design, the purposes of receiving end standing wave, insertion loss and pilot frequency isolation in a certain frequency range can be achieved. Under the condition of realizing the requirement of the related index, the receiving end also has the characteristic of very simple structure.
This provides great convenience in manufacture in the case of a very simple construction of both the transmit and receive channels, first the transmit channel can be manufactured separately as one piece and then the long and thin coupling slit of the receive channel is regularly opened in its central line, thus forming a complete transmit whole and receive part. The processing of the receiving part is simpler, and the structural model of the receiving part can be completed by processing a certain number of impedance transformation steps in the standard waveguide. This allows the construction of both the transmitting and receiving parts to be made very simple.
Since the transmit and receive channels are separately fabricated and a high isolation dual-frequency microwave mode converter should be a single unit, assembly is also an important part of this process. Fortunately, the high-isolation dual-frequency microwave mode converter only needs two parts, namely the transmitting part and the receiving part, because the transmitting part is provided with the groove-shaped structure related to the structure of the receiving part, the structure of the receiving part can be directly arranged in the groove-shaped structure, the two parts are welded together by the way of welding with the solder with high silver and copper content after the structure is plated with silver, and the influence of the welding on technical parameters can be almost ignored. Therefore, the whole high-isolation double-frequency microwave mode converter is completed, and the high-isolation double-frequency microwave mode converter is characterized in that the problems of simple structure, complex processing and great influence on the result by assembly are solved, and meanwhile, the reliability of the device is greatly improved due to the simple structure. Has wide market application prospect in various electronic devices such as microwave communication, radar and the like.
The invention has the main characteristics that the whole high-isolation double-frequency microwave mode converter has a simple structure, is convenient to process, almost ignores the influence of assembly on performance indexes, has high cost performance, excellent technical indexes and the like, and has outstanding advantages.
The high-isolation microwave mode converter has the outstanding advantages of simple structure, low processing complexity, small influence of assembly errors on technical indexes and the like, and meanwhile, because of the simple structure, the production efficiency is improved, the reliability of devices is also greatly improved, and the high-isolation microwave mode converter has wide application prospect in microwave satellite communication.
Drawings
FIG. 1 is a schematic diagram of a main view structure of a transmitting channel of a dual-frequency microwave mode converter in an embodiment;
FIG. 2 is a schematic bottom view of the structure of FIG. 1;
FIG. 3 is a left perspective structural view of FIG. 1;
FIG. 4 is a schematic diagram of the right view structure of FIG. 1;
FIG. 5 is a schematic diagram of an exemplary embodiment of a main view structure of a receiving channel of a dual-band microwave mode converter;
FIG. 6 is a schematic bottom view of the structure of FIG. 5;
FIG. 7 is a schematic cross-sectional view of the chamber in an assembled state;
in the figure: the device comprises an emission channel (1), a standard BJ84 waveguide emission port (2), a waveguide transmission line (3), a coupling slit (4), a groove type structure (5), a common circular waveguide port (6), a receiving waveguide part (7), a standard BJ84 waveguide receiving port (8) and an impedance transformation step (9).
Detailed Description
The invention discloses a high-isolation double-frequency microwave mode converter, and belongs to the field of microwave satellite communication. The technical problems that a high-isolation microwave mode converter is complex in design structure, high in processing difficulty, and the performance of a product is affected by structural assembly errors are mainly solved.
The technical scheme is further explained by combining the drawings and the specific embodiment as follows:
a design method of a high-isolation microwave mode converter comprises the following steps:
1-designing a waveguide structure as a closed cylindrical cavity;
the first end of the cylindrical cavity is coupled with a common circular waveguide port 6, the second end of the cylindrical cavity is coupled with a standard BJ84 waveguide emission port 2, and the cylindrical cavity is coupled with a receiving waveguide part 7;
2-design of the coupling structure of the cavity and the receiving waveguide part 7:
the reception waveguide portion 7 includes a rectangular parallelepiped cavity; the top end of the cuboid cavity is connected with a standard BJ84 waveguide receiving port 8, and the interior of the cuboid cavity is coupled with a standard BJ84 waveguide receiving port 8;
the top surface of the cylindrical cavity is provided with a coupling slit 4, the bottom end of the cuboid cavity is detachably connected to the top surface of the cavity, the coupling slit 4 is arranged in the range of the bottom surface of the cuboid cavity, so that the cylindrical cavity is coupled 8 with a standard BJ84 waveguide receiving port through the coupling slit, and a TE11 mode in the common circular waveguide port 6 is converted into a TE01 mode through the coupling slit 4;
3-design of the coupling structure of the cylindrical cavity to the standard BJ84 waveguide launch port 2:
a waveguide transmission line 3 with waveguide cut-off attenuation characteristics is designed at the second end of the cylindrical cavity, the waveguide transmission line 3 is connected between the cylindrical cavity and the standard BJ84 waveguide transmitting port 2, and a common circular waveguide port 6, the standard BJ84 waveguide transmitting port 2 and the standard BJ84 waveguide receiving port are coupled 8;
4-adjusting the structure of the emission channel 1:
the wide edge and the narrow edge of the waveguide are adjusted through the waveguide transmission line 3, and the length of the waveguide transmission line 3 is adjusted at the same time, so that the whole structure of the transmitting channel 1 under the optimal structure is obtained;
5-adjusting the structure of the receiving channel:
an impedance transformation step 9 is arranged in the cuboid cavity of the receiving waveguide part 7; the structure requirement of the impedance transformation step 9 is that the width of the impedance transformation step 9 is the same as the width of a waveguide formed by a cuboid cavity, and the length of the impedance transformation step 9 corresponds to the wavelength;
the impedance transformation step 9 is arranged on the wide side of the waveguide formed by the cuboid cavity, and impedance is matched by changing the size of the narrow side of the waveguide formed by the cuboid cavity;
the number of stages of the impedance conversion step 9 is set according to the receiving end frequency range.
In this example, a groove-shaped structure 5 is designed around the coupling slot 4; the shape enclosed by the groove-shaped structure 5 is the same as the radial section of the cuboid cavity; the bottom of the side wall of the cuboid-shaped cavity extends into the groove-shaped structure 5. Four corners of the radial section of the cuboid cavity are rounded corners. The relation between the number of stages of the impedance transformation step 9 and the frequency range is: the wider the frequency range, the more number of steps are used. The length of the impedance transformation step 9 is a quarter wavelength.
Referring to fig. 1 to 7, a high-isolation microwave mode converter designed by the above method structurally includes a waveguide, a transmitting channel and a receiving channel;
the waveguide is a closed cylindrical cavity; the first end of the cylindrical cavity is coupled with a common circular waveguide port 6;
the transmitting channel comprises a standard BJ84 waveguide transmitting port 2;
the receiving channel comprises a cuboid cavity, and a standard BJ84 waveguide receiving port 8 is coupled to the top end of the cuboid cavity; an impedance transformation step 9 is arranged in the cuboid cavity;
a waveguide transmission line 3 with waveguide cut-off attenuation characteristics is arranged between the second end of the cylindrical cavity and the standard BJ84 waveguide emission port 2;
the top end of the cylindrical cavity is provided with a coupling slit 4; the bottom end of the cuboid cavity is connected with the outer wall of the cylindrical cavity, and the coupling seam 4 projects in the cuboid cavity into the model of the outer wall of the cylindrical cavity; the TE11 mode coupling in the common circular waveguide port 6 is converted into a TE01 mode by the coupling slot 4;
the width of the impedance transformation step 9 is the same as the size of the wide side of the waveguide formed by the cuboid cavity, and the length of the impedance transformation step 9 corresponds to the wavelength;
the impedance transformation step 9 is arranged on the wide side of the waveguide formed by the cuboid cavity, and impedance is matched by changing the size of the narrow side of the waveguide formed by the cuboid cavity;
the number of stages of the impedance conversion step 9 is set according to the receiving end frequency range.
In this example, a groove-shaped structure 5 is arranged on the outer wall of the cylindrical cavity, and the coupling slit 4 is arranged in the area enclosed by the groove-shaped structure 5; the bottom of the side wall of the cuboid cavity extends into the groove of the groove-shaped structure 5 and is closely attached to the inner wall of the groove.
Four corners of the radial section of the cuboid cavity are rounded corners. The relation between the number of stages of the impedance transformation step 9 and the frequency range is: the wider the frequency range, the more number of steps are used. The length of the impedance transformation step 9 is a quarter wavelength.
The relation between the number of steps and the frequency range is that the wider the frequency range is, the more the number of steps is, and usually 1-5 steps can meet the use requirement under the condition of non-ultra-wideband;
the invention has the main characteristics that the whole high-isolation double-frequency microwave mode converter has a simple structure, is convenient to process, almost ignores the influence of assembly on performance indexes, has high cost performance, excellent technical indexes and the like, and has outstanding advantages. The following are technical indexes of the high-isolation dual-frequency microwave mode converter designed according to the requirements of the system:
(1) and the working frequency: 7.9-8.5GHz (transmit) 7.1-7.3GHz (receive)
(2) Insertion loss: not more than 0.1dB
(3) Port standing waves: less than or equal to 1.15
(4) And isolation of transmitting and receiving: not less than 50dB
(5) And interface form: BJ84 Standard waveguide (Transmit, receive) circular waveguide (common port)
(6) And working temperature: minus 40 ℃ to plus 55 DEG C
(7) And storage temperature: -55 ℃ to +70 ℃.
Claims (10)
1. A design method of a high-isolation microwave mode converter is characterized by comprising the following steps:
1) designing a waveguide structure as a closed cylindrical cavity;
the first end of the cylindrical cavity is coupled with a common circular waveguide port (6), the second end of the cylindrical cavity is coupled with a standard BJ84 waveguide transmitting port (2), and the cylindrical cavity is coupled with a receiving waveguide part (7);
2) designing a coupling structure of the cylindrical cavity and the receiving waveguide part (7):
the receiving waveguide portion (7) includes a rectangular parallelepiped cavity; the top end of the cuboid cavity is connected with a standard BJ84 waveguide receiving port (8), and the interior of the cuboid cavity is coupled with a standard BJ84 waveguide receiving port (8);
a coupling slit (4) is formed in the top surface of the cylindrical cavity, the bottom end of the cuboid cavity is detachably connected to the top surface of the cylindrical cavity, the coupling slit (4) is arranged in the range of the bottom surface of the cuboid cavity, the cylindrical cavity is coupled (8) with a standard BJ84 waveguide receiving port through the coupling slit, and a TE11 mode in the public circular waveguide port (6) is converted into a TE01 mode through coupling of the coupling slit (4);
3) designing a coupling structure of a cylindrical cavity and a standard BJ84 waveguide emission port (2):
a waveguide transmission line (3) with waveguide cut-off attenuation characteristics is designed at the second end of the cylindrical cavity, the waveguide transmission line (3) is connected between the cylindrical cavity and a standard BJ84 waveguide transmitting port (2), and a common circular waveguide port (6), the standard BJ84 waveguide transmitting port (2) and a standard BJ84 waveguide receiving port are coupled (8);
4) adjusting the structure of the emission channel (1):
the wide edge and the narrow edge of the waveguide between the second end of the cylindrical cavity and the BJ84 waveguide emission port (2) are adjusted through the waveguide transmission line (3), and the length of the waveguide transmission line (3) is adjusted at the same time, so that the overall structure of the emission channel (1) under the optimal structure is obtained;
5) adjusting the structure of the receiving channel:
an impedance transformation step (9) is arranged in the cuboid cavity of the receiving waveguide part (7); the structure of the impedance transformation step (9) requires that the width of the impedance transformation step (9) is the same as the size of the wide side of the waveguide formed by the cuboid cavity, and the length of the impedance transformation step (9) corresponds to the wavelength;
the impedance transformation step (9) is arranged on the wide side of the waveguide formed by the cuboid cavity, and impedance is matched by changing the size of the narrow side of the waveguide formed by the cuboid cavity;
the number of stages of the impedance conversion step (9) is set according to the frequency range of the receiving end.
2. A design method as claimed in claim 1, characterized in that a groove-shaped structure (5) is designed around the coupling slot (4); the shape enclosed by the groove-shaped structure (5) is the same as the radial section of the cuboid cavity; the bottom of the side wall of the cuboid cavity extends into the groove-shaped structure (5).
3. The design method according to claim 1 or 2, wherein four corners of the radial cross section of the rectangular parallelepiped cavity are rounded.
4. A design method as claimed in claim 1, characterized in that the number of stages of the impedance transformation step (9) is related to the frequency range by: the wider the frequency range, the more number of steps are used.
5. A design method according to claim 1, characterized in that the length of the impedance transformation step (9) is a quarter wavelength.
6. A high isolation microwave mode converter designed by the method of claim 1, wherein the structure comprises a waveguide, a transmit channel and a receive channel;
the waveguide is a closed cylindrical cavity; the first end of the cylindrical cavity is coupled with a common circular waveguide port (6);
the transmitting channel comprises a standard BJ84 waveguide transmitting port (2);
the receiving channel comprises a cuboid cavity, and a standard BJ84 waveguide receiving port (8) is coupled to the top end of the cuboid cavity; an impedance transformation step (9) is arranged in the cuboid cavity;
a waveguide transmission line (3) with waveguide cut-off attenuation characteristic is arranged between the second end of the cylindrical cavity and the standard BJ84 waveguide emission port (2);
the top end of the cylindrical cavity is provided with a coupling slit (4); the bottom end of the cuboid cavity is connected with the outer wall of the cylindrical cavity, and the coupling seam (4) is projected in the mould of the outer wall of the cylindrical cavity in the cuboid cavity; TE11 mode coupling in the common circular waveguide port (6) is converted into TE01 mode by the coupling slot (4);
the width of the impedance transformation step (9) is the same as the size of the wide side of the waveguide formed by the cuboid cavity, and the length of the impedance transformation step (9) corresponds to the wavelength; the number of stages of the impedance conversion step (9) is set according to the frequency range of the receiving end.
7. A microwave mode converter according to claim 6, characterized in that a slot-shaped structure (5) is provided on the outer wall of the cylindrical cavity, the coupling slot (4) being located in the area enclosed by the slot-shaped structure (5);
the bottom of the side wall of the cuboid cavity extends into the groove of the groove-shaped structure (5) and is closely attached to the inner wall of the groove.
8. A microwave mode converter according to claim 1 or 2, characterized in that the four corners of the radial cross-section of the cuboid cavity are rounded.
9. A microwave mode converter according to claim 6, characterized in that the number of impedance transformation steps (9) is related to the frequency range by: the wider the frequency range, the more number of steps are used.
10. Microwave mode converter according to claim 6, characterized in that the length of the impedance transformation step (9) is a quarter wavelength.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276456A (en) * | 1990-12-18 | 1994-01-04 | Prodelin Corporation | Antenna feed with selectable relative polarization |
| WO2000016431A1 (en) * | 1998-09-11 | 2000-03-23 | Channel Master Llc | Planar ortho-mode transducer |
| CN1605136A (en) * | 2001-10-22 | 2005-04-06 | 胜利微波股份有限公司 | Multiple-channel feed network |
| JP4197499B2 (en) * | 2004-02-27 | 2008-12-17 | 三菱電機株式会社 | Method for manufacturing antenna feeding circuit |
| CN201327867Y (en) * | 2008-12-03 | 2009-10-14 | 中国航天科技集团公司第五研究院第五〇四研究所 | Broadband orthomode coupler |
| CN201829600U (en) * | 2010-10-20 | 2011-05-11 | 广东盛路通信科技股份有限公司 | Polarization separator |
| CN202121033U (en) * | 2011-06-15 | 2012-01-18 | 京信通信系统（中国）有限公司 | Microwave frequency band orthogonal mode transducer |
| CN209401812U (en) * | 2019-03-19 | 2019-09-17 | 摩比科技（深圳）有限公司 | Polarization separator and its microwave device |
-
2019
- 2019-12-08 CN CN201911246281.8A patent/CN111129687A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5276456A (en) * | 1990-12-18 | 1994-01-04 | Prodelin Corporation | Antenna feed with selectable relative polarization |
| WO2000016431A1 (en) * | 1998-09-11 | 2000-03-23 | Channel Master Llc | Planar ortho-mode transducer |
| CN1605136A (en) * | 2001-10-22 | 2005-04-06 | 胜利微波股份有限公司 | Multiple-channel feed network |
| JP4197499B2 (en) * | 2004-02-27 | 2008-12-17 | 三菱電機株式会社 | Method for manufacturing antenna feeding circuit |
| CN201327867Y (en) * | 2008-12-03 | 2009-10-14 | 中国航天科技集团公司第五研究院第五〇四研究所 | Broadband orthomode coupler |
| CN201829600U (en) * | 2010-10-20 | 2011-05-11 | 广东盛路通信科技股份有限公司 | Polarization separator |
| CN202121033U (en) * | 2011-06-15 | 2012-01-18 | 京信通信系统（中国）有限公司 | Microwave frequency band orthogonal mode transducer |
| CN209401812U (en) * | 2019-03-19 | 2019-09-17 | 摩比科技（深圳）有限公司 | Polarization separator and its microwave device |
Non-Patent Citations (3)
| Title |
|---|
| R.D. TOMPKINS: "A Broad-Band Dual-Mode Circular waveguide transducer", 《IRE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
| SHUNDONG ZOU.ET.AL: "Design of Dual Band Ortho-Mode Transducer in Ka-band", 《2018 12TH INTERNATIONAL SYMPOSIUM ON ANTENNAS, PROPAGATION AND EM THEORY (ISAPE)》 * |
| WENHAO YIN ET.AL: "Design of a New Type of Dual Band and High-Isolation Ortho-mode Transducer in Ku-band", 《2019 INTERNATIONAL APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY SYMPOSIUM - CHINA (ACES)》 * |
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Application publication date: 20200508 |