High Power Waveguide Isolator

Abstract

The invention relates to the technical field of isolators, and discloses a high-power waveguide isolator, comprising an upper cavity and a lower cavity arranged at the lower end of the upper cavity, ferrites are arranged on the walls of the upper cavity and the inner cavity of the upper cavity respectively, an output port is opened on one side of the upper cavity and the lower cavity, an input port is opened on the other side thereof, water loads are arranged inside the upper cavity and the lower cavity, the water load comprises an inlet and outlet water nozzle arranged on one side of the outer surface of the upper cavity, a quartz glass tube is arranged between the inner cavities of the upper cavity and the lower cavity, a first water nozzle mounting seat is arranged on one side of the outer surface of the lower cavity, and a second water nozzle mounting seat is arranged on the other side of the outer surface of the lower cavity, when microwaves are input from the input port, due to the gyromagnetic characteristics of the ferrite excited by a magnetic circuit, the microwaves can only be output from the output port, and the microwaves reflected from the outside of the output port into the isolation will detour to the water load and be absorbed by the water, so that they will not be output from the input port, thereby realizing the function of one-way transmission from input to output.

Description

Technical Field

[0001] The invention relates to the technical field of isolators, in particular to a high-power waveguide isolator. Background Art

[0002] The isolator is a microwave passive device with two ports. It uses the gyromagnetic effect of ferrite materials under the action of an external DC magnetic field to deflect the microwave incident on the isolator at a certain angle and output it from the output port, but not at the load port, thereby achieving unidirectional transmission of microwave signals. Isolators, also known as signal isolators, are an important component of microwave systems.

[0003] However, when the current isolator is in use, its microwaves will enter from the input port, be transmitted in the correct direction, and then be output from the output port. However, when the microwaves inside some isolators are input and output, the microwaves will be output in the opposite direction, causing the microwaves to enter from the input port and then be output from the input port again.

[0004] To solve the above problems, a high-power waveguide isolator is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a high-power waveguide isolator. When microwaves are input from the input port, due to the gyromagnetic characteristics of the ferrite excited by the magnetic circuit, the microwaves can only be output from the output port. The microwaves reflected from the outside of the output port and entering the isolation will bypass the water load and be absorbed by the water, so they will not be output from the input port, thereby realizing the function of one-way transmission from input to output, thereby solving the problems in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-power waveguide isolator, comprising an upper cavity and a lower cavity arranged at the lower end of the upper cavity, wherein the upper cavity and the inner cavity wall of the upper cavity are respectively provided with ferrite, an output port is provided on one side of the upper cavity and the lower cavity, and an input port is provided on the other side thereof, and a water load is provided inside the upper cavity and the lower cavity;

[0007] The water load comprises a water inlet and outlet nozzle arranged on one side of the outer surface of the upper cavity, and a quartz glass tube is arranged between the inner cavities of the upper cavity and the lower cavity.

[0008] Preferably, the outer surfaces of the upper cavity and the lower cavity are provided with water channel covers, the first water pipe seats are provided on both sides of the upper end of the water channel cover plates, the second water pipe seats are provided on both sides of the outer surface of the lower water channel cover plates, the inner cavities of the first water pipe seats and the second water pipe seats are provided with sealing rings, and one side of the first water pipe seats and the second water pipe seats is provided with internal card straight-through joints.

[0009] Preferably, a first faucet mounting seat is provided on one side of the outer surface of the lower cavity, and a second faucet mounting seat is provided on the other side of the outer surface of the lower cavity. A steel pipe is provided on one side of the upper end of the first faucet mounting seat, and the end of the steel pipe is connected to the internal card straight-through joint. A plug is provided on one side of the second faucet mounting seat.

[0010] Preferably, a magnetic steel is arranged at the upper end of the upper cavity, and a magnetic steel pressing block is arranged on the outer surface of the magnetic steel, and the magnetic steel pressing blocks are arranged in three groups.

[0011] Preferably, a forward and reverse coupling component is provided at the upper end of the upper cavity, and the forward and reverse coupling component is a NK connector.

[0012] Preferably, the upper cavity and the lower cavity are connected via a screw, and a nut is threadedly connected to the outer surface of the screw.

[0013] Preferably, the upper end surface of the nut is provided with limiting holes, and the limiting holes are in the shape of an inner concave cylindrical structure and are evenly distributed at equal intervals.

[0014] Preferably, a telescopic groove is opened on one side of the upper end of the upper cavity, a telescopic rod is arranged in the inner cavity of the telescopic groove, a return spring is sleeved on the outer surface of the telescopic rod at one end of the inner cavity of the telescopic groove, a stopper is arranged at one end of the telescopic rod, and the telescopic rod is in a U-shaped structure, and the end is inserted into the inner cavity of the limiting hole.

[0015] Preferably, a first magnetic block is arranged at the lower end of the inner cavity of the telescopic rod, a card slot is arranged at the bottom surface of the nut, a movable slot is opened in the inner cavity of the upper cavity, a telescopic card block is arranged in the inner cavity of the movable slot, a second magnetic block is arranged in the inner cavity at the upper end of the telescopic card block, the magnetism of the second magnetic block is attracted to the magnetism of the first magnetic block, the height of the first magnetic block arranged in the inner cavity at the end of the telescopic rod is adapted to the inner cavity depth of the limiting hole, and the telescopic rod is a component made of stainless steel material;

[0016] The card slot is an inclined triangular structure, which is distributed in a ring shape end to end, and the top of the telescopic card block is also an inclined triangular structure.

[0017] Preferably, the ferrite has a diameter of 38-48 mm and a thickness of 1.5-4 mm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The high-power waveguide isolator proposed in the present invention, when microwaves are input from the input port, due to the gyromagnetic characteristics of the ferrite excited by the magnetic circuit, the microwaves can only be output from the output port, and the microwaves reflected from the output port and entering the isolation will bypass the water load and be absorbed by the water, so they will not be output from the input port, thereby realizing the function of one-way transmission from input to output.

[0020] 2. For the high-power waveguide isolator proposed in the present invention, when the isolation height between the upper cavity and the lower cavity needs to be adjusted, the nut and the screw can be adjusted, thereby achieving higher tolerance for the parameter size of the ferrite, the parameter size of the quartz glass tube and the processing.

[0021] 3. The high-power waveguide isolator proposed in the present invention has a ferrite shape and size design, which is more conducive to introducing the heat generated by it into the cavity and being quickly carried away by the water flow, thereby reducing heat concentration and avoiding stress cracking damage.

[0022] 4. The high-power waveguide isolator proposed in the present invention has a U-shaped telescopic rod that can be pulled upward when the nut and the screw have completed the isolation height adjustment, so that the end of the telescopic rod can be inserted into the inner cavity of the limiting hole opened on the upper end surface of the nut. The downward pressure is provided by the reset spring sleeved on the outer surface of the telescopic rod, so that the telescopic rod can be pressed downward to assist in pressing the upper end of the nut, thereby achieving a certain fixing effect.

[0023] 5. In the high-power waveguide isolator proposed in the present invention, when the telescopic rod is pressed down and inserted into the inner cavity of the limiting hole for pressing down and fixing, the magnetism of the first magnetic block is attracted to the magnetism of the second magnetic block arranged at the upper end of the inner cavity of the telescopic clamping block, so that the telescopic clamping block extends from the inner cavity of the movable groove, and the upper end of the telescopic clamping block can be clamped in the clamping groove, so that after the nut is fixed, the telescopic clamping block can prevent the nut from rotating in the opposite direction and becoming loose, thereby preventing the isolation height from changing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the top view of the upper cavity structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the side view structure of the upper cavity and the lower cavity of the present invention;

[0027] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0028] Figure 5 It is a schematic diagram of the front view structure of the upper cavity and the lower cavity of the present invention;

[0029] Figure 6 It is a schematic diagram of the nut structure in the present invention.

[0030] Reference numerals:

[0031] 1. Upper cavity; 2. Lower cavity; 3. Water channel cover plate; 4. Magnetic steel block; 5. First water pipe seat; 6. Second water pipe seat; 7. First faucet mounting seat; 8. Second faucet mounting seat; 9. Steel pipe; 10. Sealing ring; 11. Water load; 12. Limiting hole; 13. Nut; 14. Screw; 15. Water outlet; 16. Internal card straight-through connector; 18. NK connector; 17. Plug; 19. Magnetic steel; 20. Ferrite; 21. Quartz glass tube; 22. Output port; 23. Input port; 24. Telescopic slot; 25. Telescopic rod; 251. First magnetic block; 252. Moving slot; 253. Telescopic card block; 254. Second magnetic block; 255. Card slot; 26. Reset spring; 27. Stopper. DETAILED DESCRIPTION

[0032] The technical solution will be fully described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Reference Figure 1-2 and Figure 5 The model of the high-power waveguide isolator used in this embodiment is BJ26 type. The waveguide isolator includes an upper cavity 1 and a lower cavity 2 arranged at the lower end of the upper cavity 1. The upper cavity 1 and the lower cavity 2 form an isolator. The inner cavity walls of the upper cavity 1 and the upper cavity 2 are respectively provided with ferrites 20. An output port 22 is provided on one side of the upper cavity 1 and the lower cavity 2, and an input port 23 is provided on the other side thereof. A water load 11 is provided inside the upper cavity 1 and the lower cavity 2. The water load 11 includes a water inlet and outlet nozzle 15 provided on one side of the outer surface of the upper cavity 1. A quartz glass tube 21 is provided between the inner cavities of the upper cavity 1 and the lower cavity 2. When microwaves are input from the input port 23, due to the gyromagnetic characteristics of the ferrite 20 excited by the magnetic circuit, the microwaves can only be output from the output port 22. The microwaves reflected from the output port 22 and entering the isolation will bypass the water load 11 and be absorbed by the water, so that they will not be output from the input port 23, thereby realizing the function of one-way transmission from input to output.

[0034] It should be noted that the diameter of the ferrite 20 is 38-48 mm and the thickness is 1.5-4 mm. The shape and size design of the ferrite 20 is more conducive to introducing the heat generated by it into the cavity and being quickly taken away by the water flow, thereby reducing heat concentration and avoiding stress cracking damage.

[0035] Reference Figure 2The upper cavity 1 and the lower cavity 2 are provided with waterways in the inner cavity, and the waterways are composed of the upper cavity 1 and the lower cavity 2, the waterway cover plate 3, the first faucet mounting seat 7, the second faucet mounting seat 8, the first water pipe seat 5 and the second water pipe seat 6. The first faucet mounting seat 7 is provided on one side of the outer surface of the lower cavity 2, and the second faucet mounting seat 8 is provided on the other side of the outer surface of the lower cavity 2. A steel pipe 9 is provided on one side of the upper end of the first faucet mounting seat 7, and the end of the steel pipe 9 is connected to the internal card straight-through joint 16. A plug 17 is provided on one side of the second faucet mounting seat 8. The upper cavity 1 and the lower cavity 2 are provided with waterway cover plates 3. The first water pipe seats 5 are provided on both sides of the upper end of the waterway cover plates 3. The second water pipe seats 6 are provided on both sides of the outer surface of the lower waterway cover plates 3. The inner cavities of the first water pipe seats 5 and the second water pipe seats 6 are provided with The sealing ring 10 prevents leakage by the sealing performance of the sealing ring 10. An inner card straight-through joint 16 is arranged on one side of the first water pipe seat 5 and the second water pipe seat 6. The water channel adopts a hard connection method of a copper tube and an inner card straight-through joint 16 to avoid water leakage of the copper tube and the inner card straight-through joint 16 during use. The surface of the copper tube and the inner card straight-through joint 16 is nickel-plated to prevent oxidation corrosion. A magnet 19 is arranged on the upper end of the upper cavity 1, and a magnet block 4 is arranged on the outer surface of the magnet 19. The magnet block 4 is divided into three groups. A forward and reverse coupling component is arranged on the upper end of the upper cavity 1. The forward and reverse coupling component is an NK connector 18. The forward and reverse coupling component is integrated into the isolator, which is more convenient for detecting the forward and reverse power of the isolator and is convenient for users to build the system.

[0036] Reference Figure 2-3 The upper cavity 1 and the lower cavity 2 are connected by a screw 14, and a nut 13 is threadedly connected to the outer surface of the screw 14. When the isolation height between the upper cavity 1 and the lower cavity 2 needs to be adjusted, the nut 13 can be rotated so that the nut 13 can be raised and lowered along the direction of the screw 14, and the threaded fit of the nut 13 and the screw 14 is also convenient for adjustment, thereby having a higher tolerance for the parameter size of the ferrite 20, the parameter size of the quartz glass tube 21 and processing.

[0037] Reference Figure 4-6The upper surface of the nut 13 is provided with a limiting hole 12, and the limiting hole 12 is evenly distributed in an inward concave cylindrical structure, so that after the nut 13 is adjusted to the isolation height, the limiting holes 12 are evenly distributed on the upper end of the nut 13, so that the telescopic rod 25 can be elastically pressed down and fixed at an angle, and a telescopic groove 24 is provided on one side of the upper end of the upper cavity 1, and a telescopic rod 25 is provided in the inner cavity of the telescopic groove 24. The outer surface of the telescopic rod 25 located at one end of the inner cavity of the telescopic groove 24 is sleeved with a reset spring 26, and a stopper 27 is provided at one end of the telescopic rod 25. The telescopic rod 25 is in a U-shaped structure, and the telescopic rod 25 of the U-shaped structure is When the end is pressed down to fix the limiting hole 12, the U shape can be better plugged and fixed, and the end is plugged into the inner cavity of the limiting hole 12. When the nut 13 and the screw rod 14 complete the isolation height adjustment, the telescopic rod 25 with a U-shaped structure can be pulled upward, and then the telescopic rod 25 can be rotated so that the end of the telescopic rod 25 can be aligned with the limiting hole 12, so that the end of the telescopic rod 25 can be plugged into the inner cavity of the limiting hole 12 opened on the upper end surface of the nut 13, and the reset spring 26 sleeved on the outer surface of the telescopic rod 25 provides downward pressure, so that the telescopic rod 25 can be pressed downward to assist in pressing the upper end of the nut 13, thereby achieving a certain fixing effect.

[0038] A first magnetic block 251 is provided at the lower end of the inner cavity of the telescopic rod 25, a card slot 255 is provided on the bottom surface of the nut 13, a moving groove 252 is provided in the inner cavity of the upper cavity 1, a telescopic card block 253 is provided in the inner cavity of the moving groove 252, a second magnetic block 254 is provided in the upper inner cavity of the telescopic card block 253, the magnetism of the second magnetic block 254 is magnetically attracted to the first magnetic block 251, the height of the first magnetic block 251 provided in the inner cavity at the end of the telescopic rod 25 is adapted to the inner cavity depth of the limiting hole 12, the telescopic rod 25 is a component made of stainless steel material, after the telescopic rod 25 is inserted into the limiting hole 12, since the first magnetic block 251 is provided at the lower end of the inner cavity of the telescopic rod 25, the magnetism of the first magnetic block 251 is magnetically attracted to the second magnetic block 254, so that the telescopic card block 253 can be telescopically moved;

[0039] The slot 255 is an inclined triangular structure, which is distributed in a ring shape end to end. The top of the telescopic block 253 is also an inclined triangular structure. When the telescopic rod 25 is pressed down and inserted into the inner cavity of the limiting hole 12 for pressing down and fixing, the magnetism of the first magnetic block 251 and the magnetic attraction of the second magnetic block 254 set at the upper end of the inner cavity of the telescopic block 253 are attracted, so that the telescopic block 253 extends from the inner cavity of the moving groove 252, and the upper end of the telescopic block 253 can be connected to the slot 255, so that the inclined structure at the upper end of the telescopic block 253 cooperates with the slot 255, which has a fixing effect on the nut 13, so that after the nut 13 is fixed, the telescopic block 253 can prevent the nut 13 from rotating in the opposite direction and loosening, and prevent the isolation height from changing.

[0040] The above isolator parts are all integrally milled by a CNC machine and then connected by screw assembly, which is more conducive to ensuring the smoothness, flatness and aesthetics of the isolator.

[0041] Working principle: When microwaves are input from the input port 23, due to the gyromagnetic characteristics of the ferrite 20 excited by the magnetic circuit, the microwaves can only be output from the output port 22. The microwaves reflected from the outside of the output port 22 and entering the isolation will bypass the water load 11 and be absorbed by the water, so they will not be output from the input port 23, realizing the function of one-way transmission from input to output. When the isolation height between the upper cavity 1 and the lower cavity 2 needs to be adjusted, the nut 13 and the screw 14 can be adjusted, so that the parameter size of the ferrite 20, the parameter size of the quartz glass tube 21 and the processing fault tolerance are higher. The design of the shape and size of the ferrite 20 is more conducive to the heat generated by it being introduced into the cavity and quickly carried away by the water flow, thereby reducing heat concentration and avoiding stress cracking damage. When the nut 13 and the screw 14 have completed the adjustment of the isolation height, they can be The telescopic rod 25 with a U-shaped structure is pulled upward, so that the end of the telescopic rod 25 can be inserted into the inner cavity of the limiting hole 12 opened on the upper end surface of the nut 13, and the reset spring 26 sleeved on the outer surface of the telescopic rod 25 provides downward pressure, so that the telescopic rod 25 can be pressed downward to assist in the upper end of the nut 13, which has a certain fixing effect. When the telescopic rod 25 is pressed down and inserted into the inner cavity of the limiting hole 12 for downward pressing and fixing, the magnetism of the first magnetic block 251 and the magnetic attraction of the second magnetic block 254 set at the upper end of the inner cavity of the telescopic clamping block 253 are attracted, so that the telescopic clamping block 253 extends from the inner cavity of the moving groove 252, and the upper end of the telescopic clamping block 253 can be clamped in the clamping groove 255, so that after the nut 13 is fixed, the telescopic clamping block 253 can prevent the nut 13 from rotating in the opposite direction and loosening, and prevent the isolation height from changing, and the fixing effect is good.

[0042] It should be noted that although the embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-power waveguide isolator, comprising an upper cavity (1) and a lower cavity (2) arranged at the lower end of the upper cavity (1), characterized in that: The inner walls of the upper cavity (1) and the lower cavity (2) are respectively provided with ferrite (20); one side of the upper cavity (1) and the lower cavity (2) is provided with an output port (22), and the other side thereof is provided with an input port (23); and a water load (11) is provided inside the upper cavity (1) and the lower cavity (2); The water load (11) comprises a water inlet and outlet nozzle (15) arranged on one side of the outer surface of the upper cavity (1), and a quartz glass tube (21) arranged between the inner cavities of the upper cavity (1) and the lower cavity (2); The outer surfaces of the upper cavity (1) and the lower cavity (2) are provided with waterway covers (3), the upper ends of the waterway covers (3) are provided with first water pipe seats (5) on both sides, the outer surfaces of the lower waterway covers (3) are provided with second water pipe seats (6) on both sides, the inner cavities of the first water pipe seats (5) and the second water pipe seats (6) are provided with sealing rings (10), and one side of the first water pipe seats (5) and the second water pipe seats (6) is provided with an internal card straight-through joint (16); A first faucet mounting seat (7) is provided on one side of the outer surface of the lower cavity (2), and a second faucet mounting seat (8) is provided on the other side of the outer surface of the lower cavity (2); a steel pipe (9) is provided on one side of the upper end of the first faucet mounting seat (7), and the end of the steel pipe (9) is connected to an internal card straight-through joint (16); and a plug (17) is provided on one side of the second faucet mounting seat (8); A magnetic steel (19) is arranged at the upper end of the upper cavity (1), and a magnetic steel pressing block (4) is arranged on the outer surface of the magnetic steel (19), wherein the magnetic steel pressing blocks (4) are divided into three groups; The upper end of the upper cavity (1) is provided with a forward and reverse coupling component, and the forward and reverse coupling component is a NK connector (18); The upper cavity (1) and the lower cavity (2) are connected via a screw (14), and a nut (13) is threadedly connected to the outer surface of the screw (14); The ferrite (20) has a diameter of 38-48 mm and a thickness of 1.5-4 mm.

2. The high-power waveguide isolator according to claim 1, characterized in that: The upper end surface of the nut (13) is provided with limiting holes (12), and the limiting holes (12) are in the form of an inwardly concave cylindrical structure and are evenly distributed at equal distances.

3. The high-power waveguide isolator according to claim 2, characterized in that: A telescopic groove (24) is provided on one side of the upper end of the upper cavity (1), a telescopic rod (25) is provided in the inner cavity of the telescopic groove (24), a return spring (26) is sleeved on the outer surface of one end of the telescopic rod (25) located in the inner cavity of the telescopic groove (24), a stopper (27) is provided at one end of the telescopic rod (25), the telescopic rod (25) is in a U-shaped structure, and the end thereof is inserted into the inner cavity of the limiting hole (12).

4. The high-power waveguide isolator according to claim 3, characterized in that: The lower end of the inner cavity of the telescopic rod (25) is provided with a first magnetic block (251), the bottom surface of the nut (13) is provided with a clamping groove (255), the inner cavity of the upper cavity (1) is provided with a movable groove (252), the inner cavity of the movable groove (252) is provided with a telescopic clamping block (253), the upper inner cavity of the telescopic clamping block (253) is provided with a second magnetic block (254), the magnetic properties of the second magnetic block (254) are attracted to the magnetic properties of the first magnetic block (251), the height of the first magnetic block (251) provided in the inner cavity at the end of the telescopic rod (25) is adapted to the inner cavity depth of the limiting hole (12), and the telescopic rod (25) is a component made of stainless steel material; The card slot (255) is an inclined triangular structure, which is distributed in a ring shape end to end, and the top of the telescopic card block (253) is also an inclined triangular structure.

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