A high-power H-plane 3dB coupler with adjustable power distribution

Abstract

The invention relates to the technical field of directional couplers and power dividers, and discloses a high-power H-plane 3dB coupler with adjustable power distribution. The coupler comprises a standard waveguide cavity, a standard waveguide flange, a standard waveguide narrow surface matching, a standard waveguide wide surface matching, a slot waveguide connecting flange, a slot waveguide cavity and an adjustment platform. An adjustable matching plate is arranged at the center of the inner cavity of the slot waveguide cavity. By arranging the standard waveguide cavity, the standard waveguide flange, the standard waveguide narrow surface matching, the standard waveguide wide surface matching, the slot waveguide connecting flange, the slot waveguide cavity, the adjustable matching plate and the adjustment platform, the component structure is simplified, and the coupler has the advantages of convenient installation, easy processing and low cost. The coupler is easy to adjust when used in a microwave transmission system, so that the coupler has good standing wave ratio and directivity when the power distribution ratio changes between 1:2 and 2:1. The coupler can be directly connected to a rectangular waveguide and used in a high-power transmission system.

Description

Technical Field

[0001] The invention relates to the technical field of directional couplers and power dividers, and in particular to a high-power H-plane 3dB coupler with adjustable power distribution. Background Art

[0002] Waveguide coupler is a kind of power distribution device. It can realize signal backup, echo measurement, power distribution / synthesis, signal orthogonality and other functions. It is an important device for microwave applications. Among them, the rectangular waveguide crack bridge is composed of two rectangular waveguides of the same size and a common narrow wall. Its coupling mechanism is a crack of length L on the common narrow wall. It is one of the common components in passive microwave devices. Its main function is to distribute power or combine power. When distributing power, it usually provides a phase output signal with an equal power distribution ratio (3dB), and sometimes also provides a phase output signal with an unequal power distribution ratio. In microwave radio frequency systems, directional couplers and power dividers are widely used in different fields. They are important passive devices in antenna arrays and various microwave test systems. With the changes in coupler processing technology, directional couplers have gradually become an indispensable component in communication systems.

[0003] In many applications, functions such as power distribution / synthesis and signal orthogonality need to be realized. However, when a directional coupler is used as a power distributor in a system, its power distribution ratio will change according to the actual situation. However, the power distribution ratio of most directional couplers is fixed. Therefore, it is difficult to change the power distribution of the directional coupler while ensuring its standing wave ratio and directivity during use.

[0004] Therefore, we propose a high-power H-plane 3dB coupler with adjustable power distribution. Summary of the invention

[0005] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a high-power H-plane 3dB coupler with adjustable power distribution, which is mainly used in decimeter wave and centimeter wave bands and has the advantages of high power bearing capacity, good coupling degree and directivity, and adjustable power distribution ratio.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-power H-plane 3dB coupler with adjustable power distribution, comprising a standard waveguide cavity, a standard waveguide flange, a standard waveguide narrow surface matching, a standard waveguide wide surface matching, a crack waveguide connecting flange, a crack waveguide cavity and an adjustment platform, an adjustable matching plate is arranged at the center of the inner cavity of the crack waveguide cavity, the interface of the standard waveguide cavity is rectangular, a transmission line with a rectangular interface is arranged at the interface of the standard waveguide cavity, the standard waveguide cavity is composed of two standard rectangular waveguides, there are two standard rectangular waveguide ports and one coplanar port, the standard waveguide flange is fixedly connected to the two standard rectangular waveguide ports of the standard waveguide cavity, the crack waveguide connection The flanges are respectively fixedly connected to the two ends of the slit waveguide cavity and the coplanar port of the standard waveguide cavity, the standard waveguide narrow surface matching is fixedly connected to the transition section from the standard rectangular waveguide port to the coplanar port of the standard waveguide cavity, the standard waveguide wide surface matching is fixedly connected to the wide surface of the standard waveguide cavity, the adjustment platform is fixedly connected to the wide surface of the slit waveguide cavity, the two ends of the slit waveguide cavity are respectively fixedly connected to the coplanar surface of the standard waveguide cavity, and the adjustment platform includes a servo motor, a motor mounting top plate, a motor mounting side plate, a coupling, a first bearing pressure cover, a first connecting bearing, a first welding adapter plate, a rotating shaft, a second welding adapter plate, a second connecting bearing, a second bearing pressure cover and a rubber gasket, and the number of the rubber gaskets is two.

[0007] Preferably, the first bearing cover, the second bearing cover, the motor mounting top plate and the motor mounting side plate are locked by the first welding adapter plate and the second welding adapter plate, and the servo motor is fixed by the motor mounting top plate and the motor mounting side plate.

[0008] Preferably, the output end of the servo motor is fixedly connected to one end of the coupling.

[0009] Preferably, the other end of the coupling is fixedly connected to one end of the rotating shaft.

[0010] Preferably, one end of the outer wall of the rotating shaft is fixedly connected to the inner wall of the first connecting bearing.

[0011] Preferably, the other end of the outer wall of the rotating shaft is fixedly connected to the inner wall of the second connecting bearing.

[0012] Preferably, the first connecting bearing is compressed and fixed by a rubber gasket and a first bearing cover.

[0013] Preferably, the second connecting bearing is compressed and fixed by a rubber gasket and a second bearing gland.

[0014] Preferably, the middle end of the outer wall of the rotating shaft is fixedly connected to the inner wall of the adjustable matching plate.

[0015] The present invention provides a high-power H-plane 3dB coupler with adjustable power distribution. It has the following beneficial effects:

[0016] 1. The high-power H-plane 3dB coupler with adjustable power distribution simplifies the component structure by setting a standard waveguide cavity, a standard waveguide flange, a standard waveguide narrow surface matching, a standard waveguide wide surface matching, a slot waveguide connecting flange, a slot waveguide cavity, an adjustable matching plate and an adjustment table. It has the advantages of easy installation, easy processing and low cost. It is easy to adjust when used in a microwave transmission system, so that it has a good standing wave ratio and directivity when the power distribution ratio changes between 1:2 and 2:1. It can be directly connected to a rectangular waveguide and used in a high-power transmission system.

[0017] 2. This high-power H-plane 3dB coupler with adjustable power distribution makes the standing wave ratio of the power divider less than 1.1 through matching technology, and has the advantages of good standing wave ratio and directivity in microwave transmission systems.

[0018] 3. The high-power H-plane 3dB coupler with adjustable power distribution has the advantage of being easy to adjust by controlling the rotation angle of the adjustable matching plate through an adjustment table.

[0019] 4. A high-power H-plane 3dB coupler with adjustable power distribution controls its power distribution ratio by rotating an adjustable matching plate to achieve adjustable power distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the front side of the present invention;

[0021] Figure 2 It is a schematic diagram of the top structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the adjustment platform of the present invention.

[0023] Legend: 1. Standard waveguide cavity; 2. Standard waveguide flange; 3. Standard waveguide narrow surface matching; 4. Standard waveguide wide surface matching; 5. Slit waveguide connecting flange; 6. Slit waveguide cavity; 7. Adjustable matching plate; 8. Adjustment table; 9. Servo motor; 10. Motor mounting top plate; 11. Motor mounting side plate; 12. Coupling; 13. First bearing cover; 14. First connecting bearing; 15. First welding adapter plate; 16. Rotating shaft; 17. Second welding adapter plate; 18. Second connecting bearing; 19. Second bearing cover; 20. Rubber gasket. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", "side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: A high-power H-plane 3dB coupler with adjustable power distribution, such as Figure 1-Figure 3 As shown, it includes a standard waveguide cavity 1, a standard waveguide flange 2, a standard waveguide narrow surface matching 3, a standard waveguide wide surface matching 4, a crack waveguide connecting flange 5, a crack waveguide cavity 6 and an adjustment platform 8. An adjustable matching plate 7 is arranged at the center of the inner cavity of the crack waveguide cavity 6. The interface of the standard waveguide cavity 1 is rectangular. The interface of the standard waveguide cavity 1 is provided with a transmission line with a rectangular interface. The standard waveguide cavity 1 is composed of two standard rectangular waveguides, with two standard rectangular waveguide ports and one coplanar port. The standard waveguide flange 2 is fixedly connected to the two standard rectangular waveguide ports of the standard waveguide cavity 1. The crack waveguide connecting flange 5 is respectively connected to the two ends of the crack waveguide cavity 6 and the standard waveguide cavity 1. The standard waveguide narrow surface matching 3 is fixedly connected to the transition section from the standard rectangular waveguide port to the coplanar port of the standard waveguide cavity 1, the standard waveguide wide surface matching 4 is fixedly connected to the wide surface of the standard waveguide cavity 1, the adjustment platform 8 is fixedly connected to the wide surface of the crack waveguide cavity 6, and the two ends of the crack waveguide cavity 6 are respectively fixedly connected to the coplanar surface of the standard waveguide cavity 1. The adjustment platform 8 includes a servo motor 9, a motor mounting top plate 10, a motor mounting side plate 11, a coupling 12, a first bearing pressure cover 13, a first connecting bearing 14, a first welding adapter plate 15, a rotating shaft 16, a second welding adapter plate 17, a second connecting bearing 18, a second bearing pressure cover 19 and a rubber gasket 20, a rubber There are two gaskets 20, the first bearing cover 13, the second bearing cover 19, the motor mounting top plate 10 and the motor mounting side plate 11 are locked by the first welding adapter plate 15 and the second welding adapter plate 17, the servo motor 9 is fixed by the motor mounting top plate 10 and the motor mounting side plate 11, the output end of the servo motor 9 is fixedly connected to one end of the coupling 12, the other end of the coupling 12 is fixedly connected to one end of the rotating shaft 16, one end of the outer wall of the rotating shaft 16 is fixedly connected to the inner wall of the first connecting bearing 14, the other end of the outer wall of the rotating shaft 16 is fixedly connected to the inner wall of the second connecting bearing 18, the first connecting bearing 14 is pressed and fixed by the rubber gasket 20 and the first bearing cover 13, The second connecting bearing 18 is compressed and fixed by a rubber gasket 20 and a second bearing pressure cover 19. The middle end of the outer wall of the rotating shaft 16 is fixedly connected to the inner wall of the adjustable matching plate 7. By arranging a standard waveguide cavity 1, a standard waveguide flange 2, a standard waveguide narrow surface matching 3, a standard waveguide wide surface matching 4, a crack waveguide connecting flange 5, a crack waveguide cavity 6, an adjustable matching plate 7 and an adjustment table 8, the component structure is simplified, and has the advantages of easy installation, easy processing and low cost. It is easy to adjust when used in a microwave transmission system, so that when the power distribution ratio changes between 1:2 and 2:1, it has a good standing wave ratio and directivity, can be directly connected to a rectangular waveguide, and is used in a high-power transmission system.

[0031] Embodiment 2: Based on Embodiment 1, Figure 1-Figure 3 As shown, it includes a standard waveguide cavity 1, a standard waveguide flange 2, a standard waveguide narrow surface matching 3, a standard waveguide wide surface matching 4, a crack waveguide connecting flange 5, a crack waveguide cavity 6 and an adjustment platform 8. An adjustable matching plate 7 is arranged at the center of the inner cavity of the crack waveguide cavity 6. The standard waveguide cavity 1, the standard waveguide flange 2, the standard waveguide narrow surface matching 3, the standard waveguide wide surface matching 4, the crack waveguide connecting flange 5 and the crack waveguide cavity 6 are all made of 6061 aluminum alloy. The motor mounting top plate 10, the motor mounting side plate 11, the first bearing pressure cover 13, the first welding adapter plate 15, the rotating shaft 16, the second welding adapter plate 17 and the second bearing pressure cover 19 are made of 7075 aluminum alloy. The surfaces of the 6061 aluminum alloy and the 7075 aluminum alloy are both subjected to conductive oxidation treatment. The material of the adjustable matching plate 7 is oxygen-free copper, and its surface is subjected to silver plating treatment. The frequency range of the rectangular waveguide of model WR1500 is: 0.49~0.75GHz, taking the frequency of 0.65GHz as an example: the standard waveguide cavity 1 is composed of two standard rectangular waveguides, with a total of three ports, two standard rectangular waveguide ports and one coplanar port; the two standard rectangular waveguide ports of the standard waveguide cavity 1 are connected to the transmission line of the rectangular interface, the standard waveguide flange 2 is used to firmly connect the connecting line and the standard waveguide cavity 1, and the coplanar end of the standard waveguide cavity 1 is connected to the crack waveguide cavity 6 through the crack waveguide connecting flange 5; the standard waveguide narrow surface matching 3 is installed on the transition section from the standard rectangular waveguide port to the coplanar port of the standard waveguide cavity 1; the standard waveguide wide surface matching 4 is installed on the wide surface of the standard waveguide cavity 1; the adjustable matching plate 7 is installed inside the crack waveguide cavity 6 and is controlled by the adjustment table 8, and the adjustment table 8 is installed on the wide surface of the crack waveguide cavity 6; the adjustable matching plate 7 is placed in the crack In the waveguide cavity 6, align the hole of the adjustable matching plate 7 with the hole of the crack waveguide cavity 6, first put the key into the keyway at the tail of the shaft, and after alignment, push the rotating shaft 16 from the bottom (without motor part) into the adjustable matching plate 7 through the keyway on the hole of the adjustable matching plate 7. After pushing in, insert the first connecting bearing 18 into the rotating shaft 16, hold the shaft shoulder, lock the rubber gasket 20 and the second bearing pressure cover 19 on the second welding adapter plate 17, and press the second connecting bearing 18. At the other end of the shaft, first put the first connecting bearing 14 into the shaft, hold the shaft shoulder, lock the rubber gasket 20 and the first bearing pressure cover 13 on the first welding adapter plate 15, adjust the adjustable matching plate 7 to be roughly perpendicular to the flange surface, put the positioning block into the keyway at the shaft end and the keyway of the first bearing pressure cover 13, lock the first bearing pressure cover 13, install the servo motor 9, the motor mounting side plate and the motor mounting top plate 10, then fix the coupling 12 and the servo motor 9, and take out the positioning block. The matching technology makes the standing wave ratio of the power divider less than 1.1, which has the advantages of good standing wave ratio and directivity in the microwave transmission system.

[0032] Embodiment 3: Based on Embodiment 1 and Embodiment 2, Figure 1-Figure 3 As shown, it includes a standard waveguide cavity 1, a standard waveguide flange 2, a standard waveguide narrow surface matching 3, a standard waveguide wide surface matching 4, a crack waveguide connecting flange 5, a crack waveguide cavity 6 and an adjustment platform 8. An adjustable matching plate 7 is arranged at the center of the inner cavity of the crack waveguide cavity 6. The standard waveguide cavity 1, the standard waveguide flange 2, the standard waveguide narrow surface matching 3, the standard waveguide wide surface matching 4, the crack waveguide connecting flange 5 and the crack waveguide cavity 6 are all made of 6061 aluminum alloy. The motor mounting top plate 10, the motor mounting side plate 11, the first bearing pressure cover 13, the first welding adapter plate 15, the rotating shaft 16, the second welding adapter plate 17 and the second bearing pressure cover 19 are made of 7075 aluminum alloy. The surfaces of the 6061 aluminum alloy and the 7075 aluminum alloy are both subjected to conductive oxidation treatment. The material of the adjustable matching plate 7 is oxygen-free copper, and its surface is subjected to silver plating treatment. The frequency range of the rectangular waveguide of model WR975 is: 0.76~1.15GHz, taking the frequency of 0.915GHz as an example: the standard waveguide cavity 1 is composed of two standard rectangular waveguides, with a total of three ports, two standard rectangular waveguide ports and one coplanar port; the two standard rectangular waveguide ports of the standard waveguide cavity 1 are connected to the transmission line of the rectangular interface, the standard waveguide flange 2 is used to firmly connect the connecting line and the standard waveguide cavity 1, and the coplanar end of the standard waveguide cavity 1 is connected to the crack waveguide cavity 6 through the crack waveguide connecting flange 5; the standard waveguide narrow surface matching 3 is installed on the transition section from the standard rectangular waveguide port to the coplanar port of the standard waveguide cavity 1; the standard waveguide wide surface matching 4 is installed on the wide surface of the standard waveguide cavity 1; the adjustable matching plate 7 is installed inside the crack waveguide cavity 6 and is controlled by the adjustment table 8, and the adjustment table 8 is installed on the wide surface of the crack waveguide cavity 6; the adjustable matching plate 7 is placed in the crack In the waveguide cavity 6, align the hole of the adjustable matching plate 7 with the hole of the crack waveguide cavity 6, first put the key into the keyway at the tail of the shaft, and after alignment, push the rotating shaft 16 from the bottom (without motor part) into the adjustable matching plate 7 through the keyway on the hole of the adjustable matching plate 7. After pushing in, insert the first connecting bearing 18 into the rotating shaft 16, hold the shaft shoulder, lock the rubber gasket 20 and the second bearing pressure cover 19 on the second welding adapter plate 17, and press the second connecting bearing 18. At the other end of the shaft, first put the first connecting bearing 14 into the shaft, hold the shaft shoulder, lock the rubber gasket 20 and the first bearing pressure cover 13 on the first welding adapter plate 15, adjust the adjustable matching plate 7 to be roughly perpendicular to the flange surface, put the positioning block into the keyway at the shaft end and the keyway of the first bearing pressure cover 13, lock the first bearing pressure cover 13, install the servo motor 9, the motor mounting side plate and the motor mounting top plate 10, then fix the coupling 12 and the servo motor 9, and take out the positioning block. The rotation angle of the adjustable matching plate 7 is controlled by the adjusting platform 8, which has the advantage of being easy to adjust.

[0033] Embodiment 4: Based on Embodiment 1, Embodiment 2 and Embodiment 3, Figure 1-Figure 3 As shown, it includes a standard waveguide cavity 1, a standard waveguide flange 2, a standard waveguide narrow surface matching 3, a standard waveguide wide surface matching 4, a crack waveguide connecting flange 5, a crack waveguide cavity 6 and an adjustment platform 8. An adjustable matching plate 7 is arranged at the center of the inner cavity of the crack waveguide cavity 6. The standard waveguide cavity 1, the standard waveguide flange 2, the standard waveguide narrow surface matching 3, the standard waveguide wide surface matching 4, the crack waveguide connecting flange 5 and the crack waveguide cavity 6 are all made of 6061 aluminum alloy. The motor mounting top plate 10, the motor mounting side plate 11, the first bearing pressure cover 13, the first welding adapter plate 15, the rotating shaft 16, the second welding adapter plate 17 and the second bearing pressure cover 19 are made of 7075 aluminum alloy. The surfaces of the 6061 aluminum alloy and the 7075 aluminum alloy are both subjected to conductive oxidation treatment. The material of the adjustable matching plate 7 is oxygen-free copper, and its surface is subjected to silver plating treatment. The frequency range of the rectangular waveguide of model WR284 is: 2.60~3.95GHz, taking the frequency of 3.275GHz as an example: the standard waveguide cavity 1 is composed of two standard rectangular waveguides, with a total of three ports, two standard rectangular waveguide ports and one coplanar port; the two standard rectangular waveguide ports of the standard waveguide cavity 1 are connected to the transmission line of the rectangular interface, the standard waveguide flange 2 is used to firmly connect the connecting line and the standard waveguide cavity 1, and the coplanar end of the standard waveguide cavity 1 is connected to the crack waveguide cavity 6 through the crack waveguide connecting flange 5; the standard waveguide narrow surface matching 3 is installed on the transition section from the standard rectangular waveguide port to the coplanar port of the standard waveguide cavity 1; the standard waveguide wide surface matching 4 is installed on the wide surface of the standard waveguide cavity 1; the adjustable matching plate 7 is installed inside the crack waveguide cavity 6, and is controlled by the adjustment table 8, and the adjustment table 8 is installed on the wide surface of the crack waveguide cavity 6; the adjustable matching plate 7 is placed in the crack In the waveguide cavity 6, align the hole of the adjustable matching plate 7 with the hole of the crack waveguide cavity 6, first put the key into the keyway at the tail of the shaft, and after alignment, push the rotating shaft 16 from the bottom (without motor part) into the adjustable matching plate 7 through the keyway on the hole of the adjustable matching plate 7. After pushing in, insert the first connecting bearing 18 into the rotating shaft 16, hold the shaft shoulder, lock the rubber gasket 20 and the second bearing pressure cover 19 on the second welding adapter plate 17, and press the second connecting bearing 18. At the other end of the shaft, first put the first connecting bearing 14 into the shaft, hold the shaft shoulder, lock the rubber gasket 20 and the first bearing pressure cover 13 on the first welding adapter plate 15, adjust the adjustable matching plate 7 to be roughly perpendicular to the flange surface, put the positioning block into the keyway at the shaft end and the keyway of the first bearing pressure cover 13, lock the first bearing pressure cover 13, install the servo motor 9, the motor mounting side plate and the motor mounting top plate 10, then fix the coupling 12 and the servo motor 9, and take out the positioning block. The power distribution ratio is controlled by the rotating adjustable matching plate 7, so that the power distribution is adjustable.

[0034] Embodiment 5: Based on Embodiment 1, Embodiment 2, Embodiment 3 and Embodiment 4, Figure 1-Figure 3 As shown, it includes a standard waveguide cavity 1, a standard waveguide flange 2, a standard waveguide narrow surface matching 3, a standard waveguide wide surface matching 4, a crack waveguide connecting flange 5, a crack waveguide cavity 6 and an adjustment platform 8. An adjustable matching plate 7 is arranged at the center of the inner cavity of the crack waveguide cavity 6. The standard waveguide cavity 1, the standard waveguide flange 2, the standard waveguide narrow surface matching 3, the standard waveguide wide surface matching 4, the crack waveguide connecting flange 5 and the crack waveguide cavity 6 are all made of 6061 aluminum alloy. The motor mounting top plate 10, the motor mounting side plate 11, the first bearing pressure cover 13, the first welding adapter plate 15, the rotating shaft 16, the second welding adapter plate 17 and the second bearing pressure cover 19 are made of 7075 aluminum alloy. The surfaces of the 6061 aluminum alloy and the 7075 aluminum alloy are both subjected to conductive oxidation treatment. The material of the adjustable matching plate 7 is oxygen-free copper, and its surface is subjected to silver plating treatment. The frequency range of the rectangular waveguide of model WR90 is: 8.20~12.5GHz, taking the frequency of 10GHz as an example: the standard waveguide cavity 1 is composed of two standard rectangular waveguides, with a total of three ports, two standard rectangular waveguide ports and one coplanar port; the two standard rectangular waveguide ports of the standard waveguide cavity 1 are connected to the transmission line of the rectangular interface, the standard waveguide flange 2 is used to firmly connect the connecting line and the standard waveguide cavity 1, and the coplanar end of the standard waveguide cavity 1 is connected to the crack waveguide cavity 6 through the crack waveguide connecting flange 5; the standard waveguide narrow surface matching 3 is installed on the transition section from the standard rectangular waveguide port to the coplanar port of the standard waveguide cavity 1; the standard waveguide wide surface matching 4 is installed on the wide surface of the standard waveguide cavity 1; the adjustable matching plate 7 is installed inside the crack waveguide cavity 6 and is controlled by the adjustment table 8, and the adjustment table 8 is installed on the wide surface of the crack waveguide cavity 6; the adjustable matching plate 7 is placed in the crack waveguide Cavity 6, and then align the hole position of the adjustable matching plate 7 with the hole position of the crack waveguide cavity 6, first put the key into the keyway at the tail of the shaft, and after alignment, push the rotating shaft 16 from the bottom (without motor part) into the adjustable matching plate 7 through the keyway on the hole position of the adjustable matching plate 7. After pushing in, insert the first connecting bearing 18 into the rotating shaft 16, hold the shaft shoulder, lock the rubber gasket 20 and the second bearing pressure cover 19 on the second welding adapter plate 17, and press the second connecting bearing 18. At the other end of the shaft, first insert the first connecting bearing 14 into the shaft, hold the shaft shoulder, lock the rubber gasket 20 and the first bearing pressure cover 13 on the first welding adapter plate 15, adjust the adjustable matching plate 7 to be roughly perpendicular to the flange surface, put the positioning block into the keyway at the shaft end and the keyway of the first bearing pressure cover 13, lock the first bearing pressure cover 13, install the servo motor 9, the motor mounting side plate and the motor mounting top plate 10, then fix the coupling 12 and the servo motor 9, and take out the positioning block.

[0035] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-power H-plane 3dB coupler with adjustable power distribution, characterized in that: The invention comprises a standard waveguide cavity (1), a standard waveguide flange (2), a standard waveguide narrow surface matching (3), a standard waveguide wide surface matching (4), a crack waveguide connecting flange (5), a crack waveguide cavity (6) and an adjustment platform (8); an adjustable matching plate (7) is arranged at the center of the internal cavity of the crack waveguide cavity (6); the interface of the standard waveguide cavity (1) is rectangular; a transmission line with a rectangular interface is arranged at the interface of the standard waveguide cavity (1); the standard waveguide cavity (1) is composed of two standard rectangular waveguides, and has two standard rectangular waveguide ports and one coplanar port; the standard waveguide flange (2) is fixedly connected to the two standard rectangular waveguide ports of the standard waveguide cavity (1); the crack waveguide connecting flange (5) is respectively fixedly connected to the two ends of the crack waveguide cavity (6) and the coplanar port of the standard waveguide cavity (1); The quasi-waveguide narrow surface matching (3) is fixedly connected to the transition section from the standard rectangular waveguide port to the coplanar port of the standard waveguide cavity (1); the standard waveguide wide surface matching (4) is fixedly connected to the wide surface of the standard waveguide cavity (1); the adjustment platform (8) is fixedly connected to the wide surface of the crack waveguide cavity (6); the two ends of the crack waveguide cavity (6) are respectively fixedly connected to the coplanar surface of the standard waveguide cavity (1); the adjustment platform (8) comprises a servo motor (9), a motor mounting top plate (10), a motor mounting side plate (11), a coupling (12), a first bearing pressure cover (13), a first connecting bearing (14), a first welding adapter plate (15), a rotating shaft (16), a second welding adapter plate (17), a second connecting bearing (18), a second bearing pressure cover (19) and a rubber gasket (20); the number of the rubber gaskets (20) is two.

2. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: The first bearing pressure cover (13), the second bearing pressure cover (19), the motor mounting top plate (10) and the motor mounting side plate (11) are locked by means of a first welding adapter plate (15) and a second welding adapter plate (17), and the servo motor (9) is fixed by means of the motor mounting top plate (10) and the motor mounting side plate (11).

3. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: The output end of the servo motor (9) is fixedly connected to one end of the coupling (12).

4. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: The other end of the coupling (12) is fixedly connected to one end of the rotating shaft (16).

5. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: One end of the outer wall of the rotating shaft (16) is fixedly connected to the inner wall of the first connecting bearing (14).

6. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: The other end of the outer wall of the rotating shaft (16) is fixedly connected to the inner wall of the second connecting bearing (18).

7. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: The first connecting bearing (14) is pressed and fixed by a rubber gasket (20) and a first bearing pressure cover (13).

8. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: The second connecting bearing (18) is pressed and fixed by a rubber gasket (20) and a second bearing pressure cover (19).

9. The high-power H-plane 3dB coupler with adjustable power distribution according to claim 1, characterized in that: The middle end of the outer wall of the rotating shaft (16) is fixedly connected to the inner wall of the adjustable matching plate (7).

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