A Flexible Networking Microwave Branch System

Abstract

The present invention discloses a microwave Branch system with flexible networking, including a plurality of circulator filter components and a waveguide-to-coaxial circulator and a load. The circulator filter component is provided with at least one set of side waveguide ports symmetrically arranged on both sides of the circulator filter component, for connecting with the side waveguide port of another circulator filter component or a coaxial circulator or a load; a bottom waveguide port is also provided at the bottom of the circulator filter component for connecting an ODU device. Advantages: The integration of the circulator chain and the filter ensures the miniaturization of the cavity; the frequency band of the filter is changed so that the circulator filter component can be applied to the full frequency band. Circulator filter components of different frequency bands are combined to meet the frequency band requirements in actual use.

Description

Technical Field

[0001] The present invention relates to a microwave Branch system with flexible networking, which is mainly used in digital microwave relay communication systems and other communication application scenarios and belongs to the field of wireless communications. Background Art

[0002] With the continuous development of communication technology, modern communication systems have become more and more complex. Since the late 1990s, with the development of mobile and data communications, the two major demands of mobile coverage and data transmission have put forward more new requirements for digital microwave equipment, resulting in traditional systems being bulky, difficult to install, complex to assemble, and unstable. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a microwave Branch system with flexible networking.

[0004] In order to solve the above technical problems, the present invention provides a microwave Branch system with flexible networking, characterized in that it includes a plurality of circulator filter components and waveguide-to-coaxial circulators and loads. The circulator filter component is provided with at least one set of side waveguide ports symmetrically distributed on both sides of the circulator filter component, which is used to connect with the side waveguide port of another circulator filter component or the coaxial circulator or the load; a bottom waveguide port is also provided at the bottom end of the circulator filter component for connecting an ODU device.

[0005] Furthermore, it also includes a curved waveguide, wherein the curved waveguide is provided with two waveguide ports, which are respectively connected to the side waveguide ports of the two circulator filter assemblies, so as to connect the two circulator filter assemblies in parallel.

[0006] Furthermore, the circulator filter assembly comprises a cavity (11), a first inner cover plate (12), a dielectric filter (13), a first outer cover plate (14), a metal matching block (15), a first ferrite (16), a first magnetic field source (17), a first magnetic field cover (18), a matching step (19), a first sealing ring (110), a first tuning screw (111), a flange conversion (113), a second sealing ring (114), and a third sealing ring (115), wherein the cavity (11) has five waveguide ports, one of which is located at the bottom of the unit cavity and is used to connect to the ODU device, and the remaining four waveguide ports are symmetrically distributed in groups of two on both sides of the cavity (11);

[0007] A first inner cover plate (12) is provided between the cavity (11) and the first outer cover plate (14);

[0008] Three circulator modules are provided between the cavity (11) and the first inner cover plate (12);

[0009] The circulator module comprises a first ferrite (16) and a first metal matching block (15); there are two first metal matching blocks (15), which are respectively arranged on the inner bottom surface of the cavity (11) and the bottom of the first inner cover plate (12); the first ferrite (16) is located between the two first metal matching blocks (15), and the centers of the three overlap in the vertical direction;

[0010] A first magnetic field cavity is provided on the outer bottom surface of the cavity (11), a first magnetic field source (17) is provided in the first magnetic field cavity, and a first magnetic field source (17) is also provided on the top of the first inner cover plate (12) at a position corresponding to the magnetic field cavity, the two first magnetic field sources (17) being used to provide a magnetic field to the first ferrite (16);

[0011] The circulator modules are connected via a dielectric filter (13), and the dielectric filter (13) is fixed on the inner cover plate (12); the cavity (11) is provided with a matching step (19) at a position of a circulator module waveguide port corresponding to a port portion of the dielectric filter (13);

[0012] A plurality of first tuning screws (111) are arranged around the first magnetic field source (17);

[0013] A first sealing ring (110) is provided at the connection between the cavity (11) and the first outer cover plate (14), and a second sealing ring (114) is provided at two ports on one side of the cavity (11);

[0014] A third sealing ring (115) is provided at the connection between the bottom of the cavity (11) and the flange conversion (113).

[0015] Furthermore, the cavity (11) and the first inner cover plate (12) are connected via a first fastening screw (112), and the dielectric filter (13) is fixed to the inner cover plate (12) via the first fastening screw (112) at the port portion.

[0016] Furthermore, the first magnetic field source (17) is encapsulated in the magnetic field cavity by a first magnetic field cover (18).

[0017] Furthermore, the waveguide-to-coaxial circulator comprises a circulator cavity (21), a second outer cover plate (22), a second inner cover plate (23), a second ferrite (24), a second magnetic field source (25), an N-type connector (26), a waveguide-to-coaxial converter (27), a second tuning screw (28), a second magnetic field cover (29), a port (210), a first circulator sealing ring (211), a second circulator sealing ring (212), and a third circulator sealing ring (213);

[0018] A second inner cover plate (23) is provided between the annular cavity (21) and the second outer cover plate (22);

[0019] A circulator module is provided between the circulator cavity (21) and the second inner cover plate (23);

[0020] The circulator module comprises a second ferrite (24) and a second metal matching block; there are two second metal matching blocks, which are respectively arranged on the inner bottom surface of the circulator cavity (21) and the bottom of the second inner cover plate (23); the second ferrite (24) is located between the two metal matching blocks, and the centers of the three metal matching blocks overlap in the vertical direction;

[0021] A second magnetic field cavity is provided on the outer bottom surface of the circulator cavity (21), a second magnetic field source (25) is provided in the second magnetic field cavity, and a second magnetic field source (25) is also provided on the top of the second inner cover plate (23) at a position corresponding to the second magnetic field cavity, and the two second magnetic field sources (25) are used to provide a magnetic field to the second ferrite (24);

[0022] A plurality of second tuning screws (28) are arranged around the second magnetic field source (25);

[0023] The annular cavity (21) is provided with ports (210) in the middle of the front side and at both ends of the rear side.

[0024] The port (210) on the front side is detachably connected to the N-type connector (26) via a wave converter (27);

[0025] A circulator first sealing ring (211) is provided at the connection between the circulator cavity (21) and the second outer cover plate (22); a circulator second sealing ring (212) is provided at the connection between the port (210) and the wave converter (27); and a circulator third sealing ring (213) is provided at the connection between the wave converter (27) and the N-type connector (26).

[0026] Furthermore, the second magnetic field source (25) is a permanent magnet, which is encapsulated in a second magnetic field cavity on the top of the second inner cover plate (23) and the outer bottom surface of the annular cavity (21) through a second magnetic field cover (29).

[0027] Furthermore, the second inner cover plate (23) and the annular cavity (21), as well as the second outer cover plate (22) and the annular cavity (21) are connected via second fastening screws (214);

[0028] The N-type connector (26) is connected to the wave converter (27) via a third fastening screw (217);

[0029] The wave converter (27) is connected to the circulator cavity (21) via a fourth fastening screw (218).

[0030] Furthermore, the curved waveguide comprises a fifth fastening screw (31), a third outer cover plate (32), a curved waveguide rubber ring (33), a captive screw (34), and a curved waveguide cavity (35); curved waveguide openings are provided at both ends of the upper end surface of the curved waveguide cavity (35); grooves for placing the curved waveguide rubber ring (33) are provided on the lower end surface of the curved waveguide cavity (35) and on the surface of the curved waveguide opening; and the third outer cover plate (32) and the curved waveguide cavity (35) are connected via the captive screws (34).

[0031] Furthermore, the load comprises a load cavity (41), a load rubber ring (42), and an absorber (43); a waveguide opening surface of the load cavity (41) is provided with a groove for placing the load rubber ring (42); and the absorber (43) is installed inside the load cavity (41).

[0032] The beneficial effects achieved by the present invention are:

[0033] The integration of the circulator chain and the filter ensures the miniaturization of the cavity; the rubber rings between each component achieve waterproofing, ensuring the high air tightness of the components and the system, and improving the degree of anti-interference to the environment. By changing the frequency band of the filter, the circulator filter component can be applied to the full frequency band. Circulator filter components of different frequency bands are combined to meet the frequency band requirements in actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1-1 It is a schematic diagram of the forward split structure of a circulator filter assembly according to an embodiment of the present invention;

[0035] Figure 1-2 It is a schematic diagram of the reverse split structure of a circulator filter assembly according to an embodiment of the present invention;

[0036] Figure 2-1 It is a front view of a waveguide-to-N-type circulator assembly according to an embodiment of the present invention;

[0037] Figure 2-2 It is a schematic diagram of the forward split structure of a waveguide-to-N-type circulator assembly according to an embodiment of the present invention;

[0038] Figure 3-1 It is a schematic diagram of the forward split structure of a curved waveguide assembly according to an embodiment of the present invention;

[0039] Figure 3-2 It is a schematic diagram of the reverse split structure of a curved waveguide assembly according to an embodiment of the present invention;

[0040] Figure 4It is a schematic diagram of the split structure of a load assembly according to an embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the assembly of two circulator filter components according to an embodiment of the present invention;

[0042] Figure 6 A structural block diagram of an embodiment of a combination of two circulator filter components of the present invention;

[0043] Figure 7 It is a schematic diagram of assembling an embodiment of a combination of four circulator filter components of the present invention;

[0044] Figure 8 It is a structural block diagram of an embodiment of a combination of two circulator filter components of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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.

[0046] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0047] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation on the present invention.

[0048] like Figure 1-1 and 1-2 As shown, a circulator filter assembly includes a cavity 11, a first inner cover plate 12, a dielectric filter 13, a first outer cover plate 14, a metal matching block 15, a first ferrite 16, a first magnetic field source 17, a first magnetic field cover 18, a matching step 19, a first sealing ring 110, a first tuning screw 111 (metal tuning screw), a first fastening screw 112, a flange conversion 113, a second sealing ring 114, a third sealing ring 115, etc. There are five waveguide input and output ports on the cavity 11, one of which is located at the bottom of the unit cavity and is used to connect the ODU device, and the other four ports are symmetrically distributed on both sides of the cavity 11 in groups of two. When in use, one side receives the transmitting device and the other side is connected to the corresponding next-level load.

[0049] A first inner cover plate 12 is provided between the cavity 11 and the first outer cover plate 14; three circulator modules are installed between the cavity 11 and the first inner cover plate 12; the circulator module includes a first ferrite 16 and a metal matching block 15; there are two metal matching blocks 15, which are respectively arranged on the inner bottom surface of the cavity 11 and the bottom of the first inner cover plate 12; the first ferrite 16 is located between the two metal matching blocks 15, and the centers of the three coincide; a first magnetic field source 17 is respectively provided on the top of the first inner cover plate 12 and the outer bottom surface of the cavity 11, and the first magnetic field source 17 is located at a position corresponding to the first ferrite 16 to provide a magnetic field to the first ferrite 16, and the first magnetic field source 17 is encapsulated in the magnetic field cavity through a first magnetic field cover 18; the circulator modules are connected through a dielectric filter 13, and the cavity 11 is provided with a matching step 19 at the connected waveguide mouth position.

[0050] A plurality of first tuning screws 111 are arranged around the first magnetic field source 17, which can conveniently correct the mutual influence between the circulator and the dielectric filter 13, thereby achieving the function of optimizing the performance.

[0051] The first ferrite 16 is made of garnet and is a dedicated low intermodulation ferrite, which solves the impact of intermodulation, a key indicator, on the device.

[0052] A first sealing ring 110 is provided at the connection between the cavity 11 and the first outer cover plate 14, and a second sealing ring 114 is provided at two ports on one side of the cavity 11, which improves the air tightness, reliability and stability of the circulator.

[0053] A third sealing ring 115 is provided at the connection between the bottom of the cavity 11 and the flange conversion 113 .

[0054] The cavity 11 and the first inner cover plate 12 are connected by first fastening screws 112 , and the flatness of the connection surface is required to be high to reduce the influence on the intermodulation.

[0055] The dielectric filter 13 is fixed to the first inner cover plate 12 by the first fastening screw 112 at the port. In order to realize the miniaturization of the communication unit, the filter used is designed in the form of a dielectric resonant cavity, and the operating frequency of the resonator can be adjusted as needed, so that the entire communication unit can cover a wide operating frequency range. The cavity 11 and the waveguide port surface are both provided with grooves for placing waterproof sealing rings, so that the entire communication system unit has a waterproof function above IP65 level.

[0056] like Figure 2-1 and 2-2As shown, a waveguide-to-coaxial low intermodulation circulator includes a circulator cavity 21; a second outer cover plate 22; a second inner cover plate 23; a second ferrite 24; a second magnetic field source 25; an N-type connector 26; a waveguide-to-coaxial converter 27; a second tuning screw 28; a second magnetic field cover 29; a port 210; a first circulator sealing ring 211; a second circulator sealing ring 212; a third circulator sealing ring 213; a second fastening screw 214; an inner cover plate pin hole 215; an outer cover plate pin hole 216; a third fastening screw 217; and a fourth fastening screw 218.

[0057] The circulator cavity 21 is detachably connected to the second outer cover plate 22. Several ports 210 are provided on the side of the circulator cavity 21, and one of the ports 210 is connected to the N-type connector 26 through the wave converter 27. The port 210 is detachably connected to the wave converter 27 through the fourth fastening screw 218, and the wave converter 27 is detachably connected to the N-type connector 26 through the third fastening screw 217. A first circulator sealing ring 211 is provided at the connection between the circulator cavity 21 and the second outer cover plate 22, a second circulator sealing ring 212 is provided at the connection between the port 210 and the wave converter 27, and a third circulator sealing ring 213 is provided at the connection between the wave converter 27 and the N-type connector 26. The provision of the sealing ring improves the waterproofness of the circulator. The circulator includes a connector, and through integrated debugging, its performance is better, and the influence of the circulator installation process on intermodulation is also reduced.

[0058] A circulator module is provided in the cavity surrounded by the circulator cavity 21 and the second inner cover plate 23, and the circulator module includes a second ferrite 24 and a metal matching block. There are two metal matching blocks, which are respectively arranged on the inner bottom surface of the circulator cavity 21 and the bottom of the second inner cover plate 23, that is, metal matching blocks are respectively arranged on the opposite surfaces of the second inner cover plate 23 and the circulator cavity 21. The second ferrite 24 is located between the upper and lower metal matching blocks, and the centers of the three coincide. The second ferrite 24 is made of garnet, which can ensure low intermodulation of the circulator while having good electrical performance indicators.

[0059] The top of the second inner cover plate 23 and the outer bottom surface of the circulator cavity 21 are respectively provided with a second magnetic field source 25, and the second magnetic field source 25 is located at a position corresponding to the second ferrite 24 to provide a magnetic field to the second ferrite 24. A plurality of second tuning screws 28 are arranged around the second magnetic field source 25, and the second tuning screws 28 can conveniently correct the mutual influence generated by the connection between the port 210 and the N-type connector 26, so as to achieve the effect of optimizing the circulator performance. The second magnetic field source 25 is a permanent magnet, which is encapsulated on the top of the inner cover plate 23 and the outer bottom surface of the circulator cavity 21 through a magnetic field cover 29.

[0060] like Figure 3-1 and 3-2As shown, a curved waveguide comprises a fifth fastening screw 31, a third outer cover plate 32, a curved waveguide rubber ring 33, a captive screw 34, and a curved waveguide cavity 35, wherein both ends of the upper end surface of the curved waveguide cavity 35 are provided with curved waveguide openings, and the lower end surface of the curved waveguide cavity 35 and the surface of the curved waveguide opening are both provided with grooves for placing the curved waveguide rubber ring 33, and the third outer cover plate 32 and the curved waveguide cavity 35 are connected by the captive screw 34.

[0061] like Figure 4 As shown, a load comprises a load cavity 41, a load rubber ring 42, and an absorber 43. The waveguide opening surface of the load cavity 41 is provided with a groove for placing the load rubber ring 42, and the absorber (43) is installed inside the load cavity (41).

[0062] like Figure 5 As shown, a branch system composed of two circulator filter components includes a waveguide-to-coaxial low intermodulation circulator 51, a circulator filter component combination 52, and a load 53. The two waveguide ports of the component share a rubber ring at the connection, which is connected by a captive screw to ensure the waterproof performance between the systems.

[0063] like Figure 6 As shown, a structural block diagram of an embodiment of a combination of two circulator filter components. It includes two circulator filter components, a waveguide to N-type circulator and two loads. The various components are connected by captive screws. After the two circulator filter components are connected by captive screws, one side is connected to the two loads, the other side is connected to the waveguide to N-type circulator, and the middle port of the waveguide to N-type connector is connected to the antenna. The dielectric filter in each circulator filter component is different, and is used to perform frequency selection processing on the received or transmitted signal, and then input or output the digital microwave transceiver (ODU) located at the bottom of the cavity.

[0064] like Figure 7 As shown, a Branch system composed of four circulator filter components includes a curved waveguide 71; a circulator filter component combination 72; a waveguide-to-coaxial low intermodulation circulator 73; and a load 74. The illustrated system can meet the needs of more complex application scenarios. The curved waveguide 71 changes the signal transmission direction, ensuring that the system will not be extended in a straight line, reducing the difficulty of installation.

[0065] like Figure 8As shown, a structural block diagram of an embodiment of a combination of four circulator filter components includes four circulator filter components, a waveguide to N-type circulator, two curved waveguides and two loads. Each component is connected by a captive screw. After the two circulator filter components are connected by the captive screws, they are connected to the other two connected circulator filter components by two curved waveguides. One side of the connected component is connected to two loads, and the other side is connected to the waveguide to N-type circulator, and the middle port of the waveguide to N-type connector is connected to the antenna. The dielectric filters in the four circulator filter components are different, and are used to input or output the digital microwave transceiver (ODU) located at the bottom of the cavity after frequency selection processing of the received or transmitted signal.

[0066] The present invention has two working modes:

[0067] 1) Different signals are input from the circulator port at the bottom of each circulator filter assembly through the digital microwave transceiver (ODU) at the bottom of the cavity, and the transmission signal is transmitted through the dielectric filter f'1, f'2, f'3, f'4 and the circulator set on one side for frequency selection. The transmission signal is coupled and transmitted through the antenna.

[0068] 2) After the antenna receives the signal, it is transmitted to each circulator filter component through the waveguide to coaxial filter, and then output to the digital microwave transceiver (ODU) at the bottom of the cavity through the circulator located on the other side of the cavity, the dielectric filters f1, f2, f3, f4 and the circulator located in the middle of the cavity.

[0069] The entire transmission system achieves interference-free transmission between transmitting and receiving signals through the reverse isolation effect of the circulator and the out-of-band high suppression function of the dielectric filter.

[0070] The advantages of the microwave branch system are that all the devices used adopt the waveguide input and output structure, the system has high integration, small size, light weight, simple operation, convenient installation, good reliability, greatly improving production efficiency, and ensuring precision in processing, and having better performance indicators than similar products without this structure. The branch system uses the circulator filter components as a unit and can be assembled in multiple combinations, from one to a maximum of sixteen, which can be flexibly combined to achieve more complex signal transmission applications.

[0071] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0072] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A microwave branch system with flexible networking, characterized in that: It includes several circulator filter components, waveguide-to-coaxial circulators, and loads. The circulator filter component is provided with at least one set of side waveguide ports symmetrically distributed on both sides of the circulator filter component, which is used to connect with the side waveguide port of another circulator filter component or the coaxial circulator or the load; and a bottom waveguide port is also provided at the bottom end of the circulator filter component for connecting the ODU device. It also includes a curved waveguide, wherein the curved waveguide is provided with two waveguide ports, which are respectively connected to the side waveguide ports of the two circulator filter assemblies, so as to connect the two circulator filter assemblies in parallel and in series; The load comprises a load cavity (41), a load rubber ring (42), and an absorber (43); a waveguide opening surface of the load cavity (41) is provided with a groove for placing the load rubber ring (42); and the absorber (43) is installed inside the load cavity (41); The circulator filter assembly comprises a cavity (11), a first inner cover plate (12), a dielectric filter (13), a first outer cover plate (14), a metal matching block (15), a first ferrite (16), a first magnetic field source (17), a first magnetic field cover (18), a matching step (19), a first sealing ring (110), a first tuning screw (111), a flange conversion (113), a second sealing ring (114), and a third sealing ring (115), wherein the cavity (11) has five waveguide ports, one of which is located at the bottom of the unit cavity and is used for connecting to an ODU device, and the remaining four waveguide ports are symmetrically distributed in groups of two on both sides of the cavity (11); a first inner cover plate (12) is provided between the cavity (11) and the first outer cover plate (14); Three circulator modules are provided between the cavity (11) and the first inner cover plate (12); The circulator module comprises a first ferrite (16) and a first metal matching block (15); there are two first metal matching blocks (15), which are respectively arranged on the inner bottom surface of the cavity (11) and the bottom of the first inner cover plate (12); the first ferrite (16) is located between the two first metal matching blocks (15), and the centers of the three overlap in the vertical direction; A first magnetic field cavity is provided on the outer bottom surface of the cavity (11), a first magnetic field source (17) is provided in the first magnetic field cavity, and a first magnetic field source (17) is also provided on the top of the first inner cover plate (12) at a position corresponding to the magnetic field cavity, the two first magnetic field sources (17) being used to provide a magnetic field to the first ferrite (16); The circulator modules are connected via a dielectric filter (13), and the dielectric filter (13) is fixed on the inner cover plate (12); the cavity (11) is provided with a matching step (19) at a position of a circulator module waveguide port corresponding to a port portion of the dielectric filter (13); A plurality of first tuning screws (111) are arranged around the first magnetic field source (17); A first sealing ring (110) is provided at the connection between the cavity (11) and the first outer cover plate (14), and a second sealing ring (114) is provided at two ports on one side of the cavity (11); A third sealing ring (115) is provided at the connection between the bottom of the cavity (11) and the flange conversion (113).

2. The microwave branch system with flexible networking according to claim 1, characterized in that: The cavity (11) and the first inner cover plate (12) are connected via a first fastening screw (112), and the dielectric filter (13) is fixed to the inner cover plate (12) via the first fastening screw (112) at the port portion.

3. The microwave branch system with flexible networking according to claim 1, characterized in that: The first magnetic field source (17) is encapsulated in the magnetic field cavity by a first magnetic field cover (18).

4. The microwave branch system with flexible networking according to claim 1, characterized in that: The waveguide-to-coaxial circulator comprises a circulator cavity (21), a second outer cover plate (22), a second inner cover plate (23), a second ferrite (24), a second magnetic field source (25), an N-type connector (26), a waveguide-to-coaxial converter (27), a second tuning screw (28), a second magnetic field cover (29), a port (210), a first circulator sealing ring (211), a second circulator sealing ring (212), and a third circulator sealing ring (213); A second inner cover plate (23) is provided between the annular cavity (21) and the second outer cover plate (22); A circulator module is provided between the circulator cavity (21) and the second inner cover plate (23); The circulator module comprises a second ferrite (24) and a second metal matching block; there are two second metal matching blocks, which are respectively arranged on the inner bottom surface of the circulator cavity (21) and the bottom of the second inner cover plate (23); the second ferrite (24) is located between the two metal matching blocks, and the centers of the three metal matching blocks overlap in the vertical direction; A second magnetic field cavity is provided on the outer bottom surface of the circulator cavity (21), a second magnetic field source (25) is provided in the second magnetic field cavity, and a second magnetic field source (25) is also provided on the top of the second inner cover plate (23) at a position corresponding to the second magnetic field cavity, and the two second magnetic field sources (25) are used to provide a magnetic field to the second ferrite (24); A plurality of second tuning screws (28) are arranged around the second magnetic field source (25); The annular cavity (21) is provided with ports (210) in the middle of the front side and at both ends of the rear side. The port (210) on the front side is detachably connected to the N-type connector (26) via a wave converter (27); A circulator first sealing ring (211) is provided at the connection between the circulator cavity (21) and the second outer cover plate (22); a circulator second sealing ring (212) is provided at the connection between the port (210) and the wave converter (27); and a circulator third sealing ring (213) is provided at the connection between the wave converter (27) and the N-type connector (26).

5. The microwave branch system with flexible networking according to claim 4, characterized in that: The second magnetic field source (25) is a permanent magnet, which is encapsulated in a second magnetic field cavity on the top of the second inner cover plate (23) and the outer bottom surface of the annular cavity (21) through a second magnetic field cover (29).

6. The microwave branch system with flexible networking according to claim 4, characterized in that: The second inner cover plate (23) and the annular cavity (21), as well as the second outer cover plate (22) and the annular cavity (21) are connected via second fastening screws (214); The N-type connector (26) is connected to the wave converter (27) via a third fastening screw (217); The wave converter (27) is connected to the circulator cavity (21) via a fourth fastening screw (218).

7. The microwave branch system with flexible networking according to claim 1, characterized in that: The curved waveguide comprises a fifth fastening screw (31), a third outer cover plate (32), a curved waveguide rubber ring (33), a captive screw (34), and a curved waveguide cavity (35); both ends of the upper end surface of the curved waveguide cavity (35) are provided with curved waveguide openings; the lower end surface of the curved waveguide cavity (35) and the surface of the curved waveguide opening are both provided with grooves for accommodating the curved waveguide rubber ring (33); and the third outer cover plate (32) and the curved waveguide cavity (35) are connected via the captive screws (34).

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