Waveguide magic T with four ports

Abstract

The utility model discloses a waveguide magic T with four ports, and relates to the technical field of microwaves. The waveguide magic T comprises an upper connecting section, an upper half cavity and a lower half cavity, the upper half cavity and the lower half cavity are fixedly connected to form the lower cavity, the upper connecting section is fixed to the upper side of the lower cavity, a first waveguide channel is vertically formed in the upper connecting section, and a second waveguide channel is formed in the lower side of the lower cavity. A first waveguide channel extending leftwards and rightwards and a third waveguide channel extending forwards and backwards are formed in the upper cavity, a second waveguide channel extending leftwards and rightwards and a third waveguide channel extending forwards and backwards are formed in the lower cavity, the first waveguide channel, the second waveguide channel and the third waveguide channel are communicated with one another, the upper connecting section forms an E arm of the waveguide magic T, and the part, provided with the third waveguide channel, in the lower cavity forms an H arm of the waveguide magic T. The waveguide magic T can improve the standing wave characteristic of the H arm and has good port isolation.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave transmission devices, in particular to a waveguide magic T with four ports, which can effectively improve the standing wave characteristics of the H arm and simultaneously improve the port isolation degree. Background Art

[0002] In microwave systems, three types of connectors, namely ET, HT, and Magic Tee, are commonly used as power distribution / synthesis elements. Among them, the waveguide ET connector can output the signal input from the E port with equal amplitude and opposite phase at both ends of the balanced arm. Conversely, if signals with equal amplitude and opposite phase are input at both ends of the balanced arm, they are synthesized and output at the E port. The waveguide HT connector can output the signal input from the H port with equal amplitude and the same phase at both ends of the balanced arm. Conversely, if signals with equal amplitude and the same phase are input at both ends of the balanced arm, they are synthesized and output at the H port. The waveguide magic T is a new structure combined by ET and HT. Its characteristics are that it has a total of 4 arms, the two ends of the balanced arm are symmetrical, and there are also E arms and H arms respectively. The signal input from the E arm will be output with equal amplitude and opposite phase at both ends of the balanced arm, and the H arm is isolated; the signal input from the H arm will be output with equal amplitude and the same phase at both ends of the balanced arm, and the E arm is isolated; the signal input from any end of the balanced arm is equally divided and output at the E arm and the H arm, and the other end of the corresponding balanced arm is isolated. Therefore, the magic T has the characteristics of port isolation, 3dB coupling between adjacent ports, and perfect matching. Its function is more complete than that of a single ET or HT. In the microwave field, especially in power synthesis / distribution, monopulse radar sum-difference comparators, impedance bridges, balanced duplexers, microwave discriminators, radar transmit-receive switches, balanced mixers, phase shifters, and other applications. Although the waveguide magic T has wide applicability in microwave systems, the matching effect of the existing waveguide magic T is generally poor, the standing wave characteristics of the H arm are not good, and the isolation degree is relatively poor, resulting in poor use effects. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is how to provide a waveguide magic T with four ports that can improve the standing wave characteristics of the H arm and has a better port isolation degree.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a waveguide magic T with four ports, including an upper connection section, an upper half cavity body, and a lower half cavity body. After the upper half cavity body is fixedly connected to the lower half cavity body, a lower cavity is formed. The upper connection section is fixedly arranged on the upper side of the lower cavity. A vertically arranged first waveguide channel is formed inside the upper connection section. A second waveguide channel extending left and right and a third waveguide channel extending front and back are formed inside the lower cavity. The first waveguide channel, the second waveguide channel, and the third waveguide channel are interconnected. The upper connection section constitutes the E arm of the waveguide magic T, and the part of the lower cavity with the third waveguide channel constitutes the H arm of the waveguide magic T.

[0005] A further technical solution lies in that: the upper connecting section includes a vertically arranged waveguide cylinder part, and a first flange connecting part is respectively arranged at the upper end and the lower end of the waveguide cylinder part. The inside of the waveguide cylinder part is the first waveguide channel. The upper side port of the first waveguide channel is a first standard waveguide port, and the lower side port of the first waveguide channel is a second standard waveguide port.

[0006] A further technical solution lies in that: the upper half cavity includes an upper cavity plate, and a transition waveguide channel penetrating through its upper and lower sides is formed in the middle of the upper cavity plate. The upper end of the transition waveguide channel is arranged opposite to the lower end of the first waveguide channel. A front upper half flange connecting part is formed on the front side of the upper cavity plate, a left upper half flange connecting part is formed on the left side of the upper cavity plate, and a right upper half flange connecting part is formed on the right side of the upper cavity plate.

[0007] A further technical solution lies in that: the lower half cavity is arranged opposite to and fixedly connected with the upper half cavity. A T-shaped groove is formed on the upper surface of the lower half cavity. The left and right extending parts of the T-shaped groove are second waveguide channel grooves, and the front and rear extending parts of the T-shaped groove are third waveguide channel grooves. After the lower half cavity is fixedly connected with the upper half cavity, the second waveguide channel groove and the lower surface of the upper half cavity form a second waveguide channel, and the third waveguide channel groove and the lower surface of the upper half cavity form a third waveguide channel. The left port of the second waveguide channel is a fifth standard waveguide port, the right port of the second waveguide channel is a sixth standard waveguide port. The inner end part of the third waveguide channel is communicated with the second waveguide channel, and a seventh standard waveguide port is formed on the outer side of the third waveguide channel.

[0008] A further technical solution lies in that: a boss structure is formed in the second waveguide channel opposite to the third waveguide channel; a central column mounting hole is formed on the lower side of the lower half cavity corresponding to the boss structure, and a central column mounting groove is formed on the lower side of the central column mounting hole. The lower end of the central column is located in the central column mounting groove, the upper end of the central column is inserted into the central column mounting hole and extends upward, and protrudes from the upper surface of the boss structure.

[0009] A further technical solution lies in that: a left lower flange connecting portion is formed on the left side of the second waveguide channel groove in the lower half cavity, a right lower flange connecting portion is formed on the right side of the second waveguide channel groove in the lower half cavity, and a front lower flange connecting portion is formed on the front side of the third waveguide channel groove in the lower half cavity. After the lower half cavity is fixedly connected to the upper half cavity, the upper left half flange connecting portion and the left lower flange connecting portion constitute a second flange connecting portion, the upper right half flange connecting portion and the right lower flange connecting portion constitute a third flange connecting portion, and the front upper half flange connecting portion and the front lower flange connecting portion constitute a fourth flange connecting portion. The first flange connecting portion, the second flange connecting portion, the third flange connecting portion, and the fourth flange connecting portion are used to connect the waveguide magic T to external devices.

[0010] A further technical solution lies in that: the boss structure includes a first boss and a second boss. The first boss is fixed in the middle of the second waveguide channel, and the second boss is located on the upper surface of the first boss, and the area of the lower surface of the second boss is smaller than the area of the upper surface of the first boss.

[0011] The beneficial effects produced by adopting the above technical solutions are as follows: In the waveguide magic T of the present application, the boss structure and the central column constitute cylindrical structures with different heights and different diameters. The reflected waves generated by this structure cancel out the reflected waves caused by the discontinuity at the original joint, which can effectively guide the transmission of electromagnetic waves and achieve good matching. Compared with the cube structure, the edges of the cylindrical structure are smooth, and there are no sharp corner structures, which can effectively avoid the occurrence of electromagnetic wave resonance phenomena and effectively improve the standing wave characteristics of the H arm. The matching optimization of the E arm is achieved by the E arm matching block parallel to the electric field of the E arm. This structure is mainly used to improve the impedance matching of the E arm, reduce the reflected waves generated by the discontinuous structure, and improve the port isolation at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0013] Figure 1 is a three-dimensional structural schematic diagram of the waveguide magic T according to an embodiment of the present invention;

[0014] Figure 2 is a three-dimensional structural schematic diagram of the waveguide magic T according to an embodiment of the present invention;

[0015] Figure 3 is a front view structural schematic diagram of the waveguide magic T according to an embodiment of the present invention ( Figure 1 view angle);

[0016] Figure 4 is a left view structural schematic diagram of the waveguide magic T according to an embodiment of the present invention ( Figure 1 view angle);

[0017] Figure 5 This is a right view structural diagram of the waveguide magic T according to the embodiment of the utility model ( Figure 1 Perspective);

[0018] Figure 6 Schematic diagram of the top view of the waveguide magic T according to the embodiment of the utility model ( Figure 1 Perspective);

[0019] Figure 7 This is a schematic diagram of the structure of the waveguide magic T in an embodiment of the utility model when viewed from above ( Figure 1 Perspective);

[0020] Figure 8 This is a rear view structural diagram of the waveguide magic T according to the embodiment of the utility model ( Figure 1 Perspective);

[0021] Figure 9 It is a schematic cross-sectional structure diagram of the waveguide magic T described in an embodiment of the utility model;

[0022] Figure 10 It is a structural schematic diagram of the upper connecting section of the waveguide magic T in the embodiment of the utility model;

[0023] Figure 11 It is a schematic diagram of the structure of the upper cavity of the waveguide magic T in the embodiment of the utility model;

[0024] Figure 12 It is a schematic diagram of the structure of the upper cavity of the waveguide magic T in the embodiment of the utility model;

[0025] Figure 13 It is a schematic diagram of the structure of the lower cavity of the waveguide magic T in the embodiment of the utility model;

[0026] Figure 14 It is a schematic diagram of the structure of the lower cavity of the waveguide magic T in the embodiment of the utility model;

[0027] Figure 15 It is a schematic diagram of the structure of the lower cavity of the waveguide magic T in the embodiment of the utility model;

[0028] Wherein: 1, upper connection section; 1-1, waveguide tube; 1-2, first flange connection; 1-3, first standard waveguide port; 1-4, second standard waveguide port;

[0029] 2. Upper cavity; 2-1. Upper cavity plate; 2-2. Transfer waveguide channel; 2-3. Front upper flange connection; 2-4. Right upper flange connection; 2-5. Left upper flange connection; 2-6. Third standard waveguide port; 2-7. Fourth standard waveguide port; 2-8. E-arm matching block;

[0030] 3. Lower cavity; 3-1. Second waveguide channel groove; 3-2. Third waveguide channel groove; 3-3. Fifth standard waveguide port; 3-4. Sixth standard waveguide port; 3-5. Seventh standard waveguide port; 3-6. Central column mounting hole; 3-7. Left lower flange connection part; 3-8. Right lower flange connection part; 3-9. Front lower flange connection part;

[0031] 4. First waveguide channel;

[0032] 5. Second waveguide channel;

[0033] 6. Third waveguide channel;

[0034] 7. Boss structure; 7-1. First boss; 7-2. Second boss;

[0035] 8. Central column;

[0036] 9. Locking nut. Detailed implementation mode

[0037] Combined with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

[0038] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0039] Such as Figures 1 - 15As shown in the figure, an embodiment of the present utility model discloses a waveguide magic T with four ports. The waveguide magic T is made of a metal material, preferably brass. The waveguide magic T mainly includes three parts, namely an upper connection section 1, an upper half cavity 2, and a lower half cavity 3. The outer surfaces of the upper half cavity 2 and the lower half cavity 3 are formed with a plurality of mounting holes, and mounting screws are arranged in the mounting holes. After the upper half cavity 2 and the lower half cavity 3 are fixed together by the mounting screws, a lower cavity is formed. The upper connection section 1 is fixed on the upper side of the lower cavity. A vertically arranged first waveguide channel 4 is formed in the upper connection section 1. A second waveguide channel 5 extending left and right and a third waveguide channel 6 extending front and back are formed in the lower cavity 2. The first waveguide channel 4, the second waveguide channel 5, and the third waveguide channel 6 are interconnected. The upper connection section 1 constitutes the E arm of the waveguide magic T, and the part of the lower cavity with the third waveguide channel 6 constitutes the H arm of the waveguide magic T.

[0040] Further, as Figure 10 shown, the upper connection section 1 includes a vertically arranged waveguide cylinder part 1-1. A first flange connection part 1-2 is respectively arranged at the upper end and the lower end of the waveguide cylinder part 1-1. The first flange connection part 1-2 located at the upper end is used to connect the waveguide cylinder part 1-1 with peripheral devices, and the first flange connection part 1-2 located at the lower end is used to fixedly connect the waveguide cylinder part 1-1 with the upper half cavity 2. The inside of the waveguide cylinder part 1-1 is the vertically arranged first waveguide channel 4. The upper side port of the first waveguide channel 4 is a first standard waveguide port 1-3, and the lower side port of the first waveguide channel 3 (should be 4) is a second standard waveguide port 1-4.

[0041] Further, as Figures 11 - 12 shown, the upper half cavity 2 includes an upper cavity plate 2-1. A protruding part extending forward is formed at the front part of the upper cavity plate 2-1. A transition waveguide channel 2-2 penetrating the upper and lower sides is formed in the middle of the upper cavity plate 2-1. The length of the transition waveguide channel 2-2 is equal to the thickness of the upper cavity plate 2-1. The upper end of the transition waveguide channel 2-2 is arranged opposite to the lower end of the first waveguide channel 4. A front upper half flange connection part 2-3 is formed on the protruding part at the front side of the upper cavity plate 2-1. A left upper half flange connection part 2-5 is formed on the left side of the upper cavity plate 2-1. A right upper half flange connection part 2-4 is formed on the right side of the upper cavity plate 2-1. The upper port of the transition waveguide channel 2-2 is a third standard waveguide port 2-6, and the lower port of the transition waveguide channel 2-2 is a fourth standard waveguide port 2-7. The second standard waveguide port 1-4 is arranged opposite to the third standard waveguide port 2-6 and is mutually butted, so that the first waveguide channel 4 is connected and communicated with the transition waveguide channel 2-2. In addition, as Figure 9 andFigure 12 As shown, an E-arm matching block 2-8 extending horizontally backward to the upper cavity plate 2-1 is formed in the third standard waveguide port 2-6. The E-arm matching block 2-8 is used for matching and optimizing the E-arm electric field.

[0042] As Figures 13 - 15 shown, the lower half cavity 3 is disposed opposite to and fixedly connected with the upper half cavity 2, and part of their structures are similar; a T-shaped groove is formed on the upper surface of the lower half cavity 3, wherein the left and right extending parts of the T-shaped groove are the second waveguide channel grooves 3-1, and the front and back extending parts of the T-shaped groove are the third waveguide channel grooves 3-2. After the lower half cavity 3 is fixedly connected with the upper half cavity 2, the second waveguide channel groove 3-1 and the lower surface of the upper half cavity 2 form a second waveguide channel 5, and the third waveguide channel groove 3-2 and the lower surface of the upper half cavity 2 form a third waveguide channel 6. Among them, the left port of the second waveguide channel 5 is the fifth standard waveguide port 3-3, the right port of the second waveguide channel 5 is the sixth standard waveguide port 3-4, the inner end of the third waveguide channel 6 is communicated with the second waveguide channel 5, and a seventh standard waveguide port 3-5 is formed on the outer side of the third waveguide channel 6. The fifth standard waveguide port 3-3, the sixth standard waveguide port 3-4, and the seventh standard waveguide port 3-5 are used for connecting with the waveguide ports of peripheral devices.

[0043] As Figure 14 and Figure 15 shown, on the lower half cavity 3 of the present application, a boss structure 7 is formed in the second waveguide channel 5 opposite to the third waveguide channel 6. The boss structure 7 includes a first boss 7-1 and a second boss 7-2. The first boss 7-1 is fixed in the middle of the second waveguide channel 5. The second boss 7-2 is located on the upper surface of the first boss 7-1, and the area of the lower surface of the second boss 7-2 is smaller than the area of the upper surface of the first boss 7-1. A central column mounting hole 3-6 is formed on the lower side of the lower half cavity 3 corresponding to the boss structure 7. A central column mounting groove is formed on the lower side of the central column mounting hole 3-6. The lower end of the central column 8 is located in the central column mounting groove. The upper end of the central column 8 is inserted into the central column mounting hole 3-6 and extends upward, protruding from the upper surface of the boss structure 7. The protruding part does not enter the first waveguide channel 4, and its height is lower than that of the E-arm matching block 2-8.

[0044] Furthermore, the central column 8 is of a stepped structure. A flat mounting groove is formed at the lower end of the central column 8. An external thread is formed on the outer surface of the lower part of the central column 8. A locking nut 9 is threadedly connected to the external thread, and the central column 8 is locked into the central column mounting groove through the locking nut 9.

[0045] Further, as Figures 13 - 15 shown, a left lower flange connecting portion 3-7 is formed on the left side of the second waveguide channel groove 3-1 in the lower half cavity 3, a right lower flange connecting portion 3-8 is formed on the right side of the second waveguide channel groove 3-1 in the lower half cavity 3, and a front lower flange connecting portion 3-9 is formed on the front side of the third waveguide channel groove 3-2 in the lower half cavity 3. After the lower half cavity 3 is fixedly connected to the upper half cavity 2, the upper left half flange connecting portion 2-5 and the left lower flange connecting portion 3-7 constitute a second flange connecting portion, the upper right half flange connecting portion 2-4 and the right lower flange connecting portion 3-8 constitute a third flange connecting portion, and the front upper half flange connecting portion 2-3 and the front lower flange connecting portion 3-9 constitute a fourth flange connecting portion. The first flange connecting portion, the second flange connecting portion, the third flange connecting portion, and the fourth flange connecting portion are used to connect the waveguide magic T to external devices.

[0046] Working principle: The waveguide magic T structure is a four-port network. When electromagnetic wave signals are input in-phase / anti-phase with equal amplitude from the fifth standard waveguide port 3-3 and the sixth standard waveguide port 3-4, there is an output / no output at the seventh standard waveguide port 3-5 of the H arm, and there is no output / there is an output at the first standard waveguide port 1-3 of the E arm. When electromagnetic wave signals are input from the seventh standard waveguide port 3-5 of the H arm / the first standard waveguide port 1-3 of the E arm, the signals output from the fifth standard waveguide port 3-3 and the sixth standard waveguide port 3-4 are in-phase with equal amplitude / anti-phase with equal amplitude, and there is no output at the first standard waveguide port 1-3 of the E arm / the seventh standard waveguide port 3-5 of the H arm.

[0047] In the waveguide magic T of the present application, the boss structure and the central column constitute a cylindrical structure with different heights and different diameters. The reflected wave generated by this structure cancels out the reflected wave caused by the discontinuity at the original joint, which can effectively guide the transmission of electromagnetic waves and achieve good matching. Compared with the cube structure, the edge of the cylindrical structure is gentle and there is no sharp corner structure, which can effectively avoid the occurrence of electromagnetic wave resonance phenomenon and effectively improve the standing wave characteristics of the H arm. The matching optimization of the E arm is achieved by the E arm matching block parallel to the electric field of the E arm. This structure is mainly used to improve the impedance matching of the E arm, reduce the reflected wave generated by the discontinuous structure, and improve the port isolation at the same time.

[0048] The specific dimension parameters of the structure are not provided in the embodiments of the present utility model because for different application requirements, there will be different performance index requirements, so the dimensions are not fixed.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waveguide magic T with four ports, characterized in that: The invention comprises an upper connecting section (1), an upper cavity (2) and a lower cavity (3), wherein the upper cavity (2) and the lower cavity (3) are fixedly connected to form a lower cavity, the upper connecting section (1) is fixed on the upper side of the lower cavity, a vertically arranged first waveguide channel (4) is formed in the upper connecting section (1), a second waveguide channel (5) extending leftward and rightward and a third waveguide channel (6) extending frontward and rearward are formed in the lower cavity, the first waveguide channel (4), the second waveguide channel (5) and the third waveguide channel (6) are interconnected, the upper connecting section (1) constitutes an E arm of the waveguide magic T, and the portion of the lower cavity having the third waveguide channel (6) constitutes an H arm of the waveguide magic T; The upper connecting section (1) comprises a vertically arranged waveguide tube portion (1-1), the upper end and the lower end of the waveguide tube portion (1-1) are respectively provided with a first flange connecting portion (1-2), the interior of the waveguide tube portion (1-1) is the first waveguide channel (4), the upper port of the first waveguide channel is a first standard waveguide port (1-3), and the lower port of the first waveguide channel (4) is a second standard waveguide port (1-4); The upper cavity (2) comprises an upper cavity plate (2-1); a transfer waveguide channel (2-2) penetrating the upper and lower sides of the upper cavity plate (2-1) is formed in the middle of the upper cavity plate (2-1); the upper end of the transfer waveguide channel (2-2) is arranged opposite to the lower end of the first waveguide channel (4); a front upper flange connection portion (2-3) is formed on the front side of the upper cavity plate (2-1); a left upper flange connection portion (2-5) is formed on the left side of the upper cavity plate (2-1); and a right upper flange connection portion (2-4) is formed on the right side of the upper cavity plate (2-1); The upper port of the switching waveguide channel (2-2) is a third standard waveguide port (2-6), the lower port of the switching waveguide channel (2-2) is a fourth standard waveguide port (2-7), and an E-arm matching block (2-8) is formed in the third standard waveguide port (2-6) and extends horizontally toward the rear side of the upper cavity plate (2-1).

2. The waveguide magic T with four ports as claimed in claim 1, characterized in that: The lower cavity (3) is arranged opposite to and fixedly connected to the upper cavity (2); a T-shaped groove is formed on the upper surface of the lower cavity (3); the left and right extensions of the T-shaped groove are the second waveguide channel groove (3-1); the front and rear extensions of the T-shaped groove are the third waveguide channel groove (3-2); when the lower cavity (3) is fixedly connected to the upper cavity (2), the second waveguide channel groove (3-1) and the lower surface of the upper cavity (2) form a second waveguide channel groove. The third waveguide channel groove (3-2) and the lower surface of the upper cavity (2) form a third waveguide channel (6), the left port of the second waveguide channel (5) is a fifth standard waveguide port (3-3), the right port of the second waveguide channel (5) is a sixth standard waveguide port (3-4), the inner end of the third waveguide channel (6) is connected to the second waveguide channel (5), and the outer side of the third waveguide channel (6) is formed with a seventh standard waveguide port (3-5).

3. The waveguide magic T with four ports as claimed in claim 2, characterized in that: A boss structure (7) is formed in the second waveguide channel (5) opposite to the third waveguide channel (6); a center column mounting hole (3-6) is formed on the lower side of the lower half cavity (3) corresponding to the boss structure (7); a center column mounting groove is formed on the lower side of the center column mounting hole (3-6); the lower end of the center column (8) is located in the center column mounting groove; the upper end of the center column (8) is inserted into the center column mounting hole (3-6) and extends upward, protruding from the upper surface of the boss structure (7).

4. The waveguide magic T with four ports as claimed in claim 2, characterized in that: A left lower half flange connection portion (3-7) is formed on the left side of the second waveguide channel groove (3-1) in the lower half cavity (3), a right lower half flange connection portion (3-8) is formed on the right side of the second waveguide channel groove (3-1) in the lower half cavity (3), and a front lower half flange connection portion (3-9) is formed on the front side of the third waveguide channel groove (3-2) in the lower half cavity (3). When the lower half cavity (3) is fixedly connected to the upper half cavity (2), the left upper half flange connection portion (2-5) and the left lower half flange connection part (3-7) constitute a second flange connection part, the right upper half flange connection part (2-4) and the right lower half flange connection part (3-8) constitute a third flange connection part, the front upper half flange connection part (2-3) and the front lower half flange connection part (3-9) constitute a fourth flange connection part, and the first flange connection part, the second flange connection part, the third flange connection part and the fourth flange connection part are used to connect the waveguide magic T with external equipment.

5. The waveguide magic T with four ports as claimed in claim 3, characterized in that: The boss structure (7) comprises a first boss (7-1) and a second boss (7-2), wherein the first boss (7-1) is fixed to the middle of the second waveguide channel (5), the second boss (7-2) is located on the upper surface of the first boss (7-1), and the area of ​​the lower surface of the second boss (7-2) is smaller than the area of ​​the upper surface of the first boss (7-1).

6. The waveguide magic T with four ports as claimed in claim 3, characterized in that: The central column (8) is a stepped structure, a straight-line installation groove is formed at the lower end of the central column (8), an external thread is formed on the outer surface of the lower part of the central column (8), a locking nut (9) is threadedly connected to the external thread, and the central column (8) is locked into the central column installation groove by the locking nut (9).

7. The waveguide magic T with four ports as claimed in claim 1, characterized in that: A plurality of mounting holes are formed on the outer surfaces of the upper cavity (2) and the lower cavity (3), and mounting screws are arranged in the mounting holes, and the upper cavity (2) and the lower cavity (3) are fixed together by the mounting screws.

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