A compact waveguide hybrid synthesis network

Abstract

A compact waveguide hybrid synthesis network, characterized in that it includes integrated: a waveguide H-T junction; a pair of magic Ts symmetrically connected to the branch input ends of the waveguide H-T junction; and two pairs of waveguide E-T junctions, symmetrically connected to the branch input ends of the magic T. Specifically includes: an H-arm output waveguide, an H-arm output gradient waveguide, an H-arm matching structure, an H-arm branch gradient waveguide, a T-type branch steering waveguide, a magic T branch gradient waveguide, a magic T four-port matching structure, a magic T load port gradient waveguide, a probe structure, a magic T branch steering waveguide, an E-arm matching structure, an E-arm input waveguide and an assembly cavity. The magic T is integrated between the waveguide H-T junction and the waveguide E-T junction, the waveguide H-T junction adopts a standard waveguide port, and the waveguide E-T junction adopts a non-standard waveguide port, so as to realize multi-channel non-standard waveguide port input and standard waveguide port output, with low insertion loss, wide working bandwidth, good amplitude and phase balance, reduced volume, convenient processing and strong practicality.

Description

Technical Field

[0001] The invention belongs to the field of communication, relates to waveguide synthesis / microwave power division technology, and is particularly related to a compact waveguide hybrid synthesis network. Background Art

[0002] Waveguide synthesis is a power synthesis method widely used in microwave systems. Its function is to synthesize multiple power channels to obtain greater power. The performance of the synthesis network, such as insertion loss, isolation, phase balance, and amplitude balance, will have a great impact on the performance of the entire system.

[0003] The conventional T-junction is a three-port network with no isolation between stages. When power synthesis is performed, the influence between stages is relatively large. Especially when multi-channel waveguide input is required for power synthesis, there are many defects such as large loss and unsatisfactory amplitude and phase balance. In addition, the existing method has a complex structure and a large volume to achieve multi-channel input, and is not easy to process and shape, which greatly reduces its applicability. Summary of the invention

[0004] In order to solve the above-mentioned deficiencies in the related prior art, the present invention provides a compact waveguide hybrid synthesis network, which integrates the magic T between the waveguide HT junction and the waveguide ET junction. The waveguide HT junction adopts a standard waveguide port, and the waveguide ET junction adopts a non-standard waveguide port, thereby realizing multi-channel non-standard waveguide port input and standard waveguide port output, with low insertion loss, wide working bandwidth, good amplitude and phase balance, reduced size, convenient processing and strong practicality.

[0005] In order to achieve the purpose of the present invention, the following scheme is proposed:

[0006] A compact waveguide hybrid synthesis network, characterized by comprising integrated:

[0007] Waveguide HT junction;

[0008] Magic T, there is a pair, symmetrically connected to the branch input end of the waveguide HT junction; and

[0009] There are two pairs of waveguide ET junctions, which are symmetrically connected to the branch input ends of the magic T;

[0010] The input end of the waveguide ET junction uses a non-standard waveguide port, and the output end of the waveguide HT junction uses a standard waveguide port.

[0011] Further, the waveguide ET junction comprises:

[0012] A pair of E-arm input waveguides symmetrically spaced apart, with non-standard waveguide ports on the E-surfaces used as RF signal input terminals; and

[0013] The E-arm spacer structure is arranged between a pair of E-arm input waveguides and is used for performing the first power synthesis of the radio frequency signal input from the E-arm input waveguide.

[0014] Further, Magic T, including:

[0015] A pair of magic T branch steering waveguides are symmetrically arranged, one end of which is connected to the E-arm diaphragm structure, and is used to perform a 90° steering of the radio frequency signal synthesized by the E-arm diaphragm structure in a step transition manner, so as to make the radio frequency signal entering the magic T branch in the same direction;

[0016] A pair of magic T branch gradient waveguides are symmetrically arranged and respectively connected to the other end of the corresponding magic T branch steering waveguide to increase the working bandwidth; and

[0017] A magic T four-port matching structure, a pair of magic T branch gradient waveguides are symmetrically connected on both sides of the magic T four-port matching structure, and are used to match the signal power distribution ratio and isolation in the T-type coupling cavity together with the magic T branch gradient waveguide to perform the second power synthesis.

[0018] Furthermore, the magic T four-port matching structure adopts a stepped square column structure, with the top surface facing the direction of the port on the E surface, and the bottom surface located in the opposite direction of the port on the E surface, and the side length of the stepped square column decreases from the bottom surface to the top surface.

[0019] Furthermore, a load module is vertically arranged on the magic T four-port matching structure for absorbing multi-path unbalanced power; a magic T load port gradient waveguide is provided on one side of the load module facing the direction of the port of the E-plane for matching the standing wave of the load port.

[0020] A probe structure is provided on the side of the load module facing the other magic T, and the probe structure includes:

[0021] a probe substrate; and

[0022] The load resistor is sintered on one side of the load module together with the probe substrate.

[0023] Further, the waveguide HT junction comprises:

[0024] There is a pair of T-shaped branch steering waveguides, which are symmetrically arranged, and one end of each of which is connected to the magic T four-port matching structure of the corresponding magic T, which is used to perform a 90° steering on the RF signal synthesized by the magic T, so that the RF signal entering the waveguide HT junction is branched in the same direction;

[0025] There is a pair of H-arm branch gradient waveguides, which are symmetrically arranged and respectively connected to the other end of the corresponding T-branch steering waveguide to increase the working bandwidth;

[0026] An H-arm diaphragm structure, a pair of H-arm branch gradient waveguides are symmetrically connected to both sides of the H-arm diaphragm structure, and are used to perform a third synthesis of the radio frequency signals transmitted by each magic T; and

[0027] The H-arm output waveguide is vertically connected to the H-arm spacer structure through the H-arm output gradient waveguide, and is used to output the third synthesized radio frequency signal. The H surface of the H-arm output waveguide adopts a standard waveguide port.

[0028] Furthermore, the waveguide ET junction is vertically arranged, a pair of E-arm input waveguides are arranged vertically and spaced apart from each other, and the E-arm spacer structure is located between the E-arm input waveguides.

[0029] The magic T branch steering waveguide is horizontally and vertically connected to the E-arm spacer structure, and the magic T branch steering waveguide is in the opposite direction to the E-plane port of the E-arm input waveguide;

[0030] The H-arm output waveguide, the H-arm output gradient waveguide, the H-arm spacer structure, the H-arm branch gradient waveguide, the T-type branch turning waveguide, the magic T branch gradient waveguide, and the magic T four-port matching structure are all on the same horizontal plane as the magic T branch turning waveguide.

[0031] Furthermore, it also includes:

[0032] The cavity is used to accommodate the integrated waveguide HT junction, a pair of magic Ts, and two pairs of waveguide ET junctions, and the shape of the cavity matches the overall shape of the integrated waveguide HT junction, a pair of magic Ts, and two pairs of waveguide ET junctions;

[0033] The cavity has an output port vertically arranged on one side of the cavity length direction, and four input ports penetrating the top and bottom surfaces of the cavity at a predetermined distance from the other side; the output port matches the H-arm output waveguide, and the input port is used for the E-arm input waveguide of the waveguide ET junction to extend out of the top and bottom surfaces of the cavity;

[0034] Two load cavities are arranged on the top surface of the cavity body for accommodating the load module and the probe structure.

[0035] The beneficial effects of the present invention are:

[0036] 1. The magic T is integrated between the waveguide HT junction and the waveguide ET junction. The waveguide HT junction adopts a standard waveguide port, and the waveguide ET junction adopts a non-standard waveguide port, realizing multi-channel non-standard waveguide port input and standard waveguide port output, and can realize X-band 1.6GHz bandwidth power synthesis; at the same time, the input port is a non-international standard rectangular waveguide port, and the vertical signal feeding of the input port is realized, which is conducive to reducing the size of the input port and further miniaturizing the size of the overall synthesis network, reducing the volume and weight; the output port is an international standard waveguide port, and there is no need to redesign the non-standard waveguide port to convert it to a standard waveguide port for transition;

[0037] 2. Probe structure absorption load, this absorption load uses microstrip probe method for power coupling and absorbs power through 50 ohm resistor. It is used as a universal standard waveguide load to replace the traditional waveguide load. It has the characteristics of convenient design and strong versatility. The microstrip probe can also be replaced with a coaxial probe method, which has the same principle and can effectively reduce the volume;

[0038] 3. The isolation between the four branches after the eight-way synthesis is guaranteed, and the advantages of low insertion loss, wide working bandwidth, and good amplitude and phase balance are achieved; it is also easy to process, and the matching structure and magic T can be processed by one-time milling, which meets the actual engineering needs;

[0039] 4. The split-cavity design is adopted, the magic T matching structure is designed in the lower cavity, the gradient structure is designed in the upper cavity, the load cavity is an independent structure, and a 0.05mm boss is designed on the contact surface of the upper and lower cavities to ensure the close combination of the upper and lower cavities; this hybrid synthetic network structure is suitable for the installation of the upper and lower structures of miniaturized power amplifier modules, and can meet various forms of heat dissipation methods;

[0040] 5. The X-band waveguide hybrid synthesis network structure of the present invention is simple, the impedance matching of each port is good, the insertion loss of the eight-way branch is less than 0.3dB, the isolation between the four-way branches after synthesis is greater than 17dB, and it has a wide working bandwidth. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present application.

[0042] Figure 1 A schematic diagram of the synthetic network structure of an embodiment of the present application is shown.

[0043] Figure 2 The cavity structure of the embodiment of the present application is shown Figure 1 .

[0044] Figure 3 The cavity structure of the embodiment of the present application is shown Figure 2 .

[0045] Figure 4 The insertion loss characteristic curve of the eight-way branch and the output port return loss characteristic curve of the embodiment of the present application are shown.

[0046] Figure 5 The isolation curves between ET junctions and the four output ports after synthesis of the embodiment of the present application are shown.

[0047] Figure 6 The return loss curve of the magic T isolation end of the embodiment of the present application is shown. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the implementation modes of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] It should be noted that in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description. The terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. The terms "parallel", "perpendicular" and the like do not mean that the components are required to be absolutely parallel or perpendicular, but can be slightly tilted.

[0051] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0052] like Figure 1 As shown, this example provides a compact waveguide hybrid synthesis network, including integrated: waveguide HT junction, magic T, waveguide ET junction. There is a pair of magic T, symmetrically connected to the branch input end of the waveguide HT junction; there are two pairs of waveguide ET junctions, symmetrically connected to the branch input ends of the magic T; the input end of the waveguide ET junction adopts a non-standard waveguide port, and the output end of the waveguide HT junction adopts a standard waveguide port.

[0053] The non-standard waveguide ports have the same structural dimensions and are located relatively.

[0054] Specifically, the waveguide hybrid synthesis network of this example includes:

[0055] H-arm output waveguide 1, H-arm output gradient waveguide 2, H-arm matching structure 3, H-arm branch gradient waveguide 4, T-type branch steering waveguide 5;

[0056] Magic T branch gradient waveguide 6, magic T four-port matching structure 7, magic T load port gradient waveguide 8, probe structure 9, magic T branch steering waveguide 10;

[0057] E-arm matching structure 11 and E-arm input waveguide 12 .

[0058] Among them, Figure 1 As shown, the waveguide ET junction includes: an E-arm septum structure 11 and a pair of E-arm input waveguides 12 symmetrically spaced. The E-surface of the E-arm input waveguide 12 adopts a non-standard waveguide port, which is used as an input end of a radio frequency signal; the E-arm septum structure 11 is arranged between the pair of E-arm input waveguides 12, and is used to perform a first power synthesis of the radio frequency signal input from the E-arm input waveguide 12.

[0059] Among them, Figure 1 As shown, the magic T includes: a magic T branch gradient waveguide 6, a magic T four-port matching structure 7, a magic T load port gradient waveguide 8, a probe structure 9, and a magic T branch steering waveguide 10.

[0060] There is a pair of magic T branch steering waveguides 10, which are symmetrically arranged, and one end of which is connected to the E arm diaphragm structure 11, which is used to perform a 90° turn on the RF signal synthesized by the E arm diaphragm structure 11 through a step transition method, so that the RF signal entering the magic T is branched in the same direction. There is a pair of magic T branch gradient waveguides 6, which are symmetrically arranged and respectively connected to the other end of the corresponding magic T branch steering waveguide 10, so as to increase the working bandwidth. A pair of magic T branch gradient waveguides 6 are symmetrically connected to both sides of the magic T four-port matching structure 7, and are used to match the signal power distribution ratio and isolation in the T-type coupling cavity together with the magic T branch gradient waveguide 6 to perform a second power synthesis.

[0061] Specifically, the magic T four-port matching structure 7 is located in the center of the four-port network in the form of a stepped square column, the top surface of the stepped matching square column faces the direction of the E-face port, and the bottom surface of the stepped matching square column is located in the opposite direction of the E-face port. The stepped matching square column is arranged in this way to facilitate impedance matching of the signal power distribution ratio and isolation in the T-type coupling cavity. At the same time, the E-face port adopts a microstrip probe structure connected to a 50 ohm resistor to absorb the unbalanced power.

[0062] A load module is vertically arranged on the magic T four-port matching structure 7 for absorbing multi-channel unbalanced power; a magic T load port gradient waveguide 8 is arranged on one side of the load module facing the port of the E surface for matching the standing wave of the load port.

[0063] A probe structure 9 is provided on one side of the load module facing the other magic T. The probe structure 9 includes: a probe substrate; and a load resistor sintered together with the probe substrate on one side of the load module.

[0064] Among them, Figure 1 As shown, the waveguide HT junction includes: an H-arm output waveguide 1, an H-arm output gradient waveguide 2, an H-arm matching structure 3, an H-arm branch gradient waveguide 4, and a T-branch turning waveguide 5.

[0065] There is a pair of T-branch steering waveguides 5, which are symmetrically arranged, and one end of each of them is connected to the magic T four-port matching structure 7 of the corresponding magic T, which is used to make a 90° turn on the RF signal synthesized by the magic T, so that the RF signal branches entering the waveguide HT junction are in the same direction; there is a pair of H-arm branch gradient waveguides 4, which are symmetrically arranged and respectively connected to the other end of the corresponding T-branch steering waveguide 5, which is used to increase the working bandwidth; a pair of H-arm branch gradient waveguides 4 are symmetrically connected to both sides of the H-arm spacer structure 3, which is used to perform a third synthesis of the RF signals transmitted by each magic T; the H-arm output waveguide 1 is vertically connected to the H-arm spacer structure 3 through the H-arm output gradient waveguide 2, which is used to output the third synthesized RF signal, and the H surface of the H-arm output waveguide 1 adopts a standard waveguide port.

[0066] Specifically, the magic-T branch steering waveguide 10 and the magic-T branch gradient waveguide 6 adopt a stepped structure, and show a stepped downward trend toward the direction of the magic-T four-port matching structure 7.

[0067] Specifically, the T-branch steering waveguide 5 and the H-arm branch gradient waveguide 4 adopt a stepped structure, and present a stepped upward trend toward the H-arm spacer structure 3 .

[0068] Specifically, the H-arm output gradient waveguide 2 adopts a stepped structure, which presents a step-up trend from the H-arm spacer structure 3 toward the H-arm output waveguide 1 .

[0069] The specific space and structural layout design is as follows:

[0070] The waveguide ET junction is vertically arranged, a pair of E-arm input waveguides 12 are spaced apart in the vertical direction, an E-arm spacer structure 11 is located between the E-arm input waveguides 12, a magic-T branch steering waveguide 10 is horizontally and vertically connected to the E-arm spacer structure 11, and the magic-T branch steering waveguide 10 is in the opposite direction to the E-plane port of the E-arm input waveguide 12; the H-arm output waveguide 1, the H-arm output gradient waveguide 2, the H-arm spacer structure 3, the H-arm branch gradient waveguide 4, the T-type branch steering waveguide 5, the magic-T branch gradient waveguide 6, and the magic-T four-port matching structure 7 are all in the same horizontal plane with the magic-T branch steering waveguide 10.

[0071] On this basis, the Figure 2-Figure 3 The cavity 13 shown is used to accommodate the synthetic network described in this example. The cavity 13 includes an upper cavity 15 and a lower cavity 16, and the synthetic network is assembled between the upper cavity 15 and the lower cavity 16. Specifically, the contact surface of the upper cavity 15 and the lower cavity 16 is designed with a 0.05mm boss to ensure the tight combination of the upper and lower cavities during assembly.

[0072] The shape of the cavity 13 matches the overall shape of the integrated waveguide HT junction, a pair of magic Ts, and two pairs of waveguide ET junctions; the cavity 13 has an output port 14 vertically arranged on one side of the length direction of the cavity 13, and four input ports 18 penetrating the top and bottom surfaces of the cavity 13 at a predetermined distance from the other side; the output port 14 matches the H-arm output waveguide 1, and the input port 18 is used for the E-arm input waveguide 12 of the waveguide ET junction to extend from the top and bottom surfaces of the cavity 13, that is, the E-arm input waveguide 12 extends from the input ports 18 of the upper cavity 15 and the lower cavity 16 respectively. Two load cavities 17 are arranged on the top surface of the cavity 13 to accommodate the load module and the probe structure 9.

[0073] In this way, the assembly of the composite network is completed. The hybrid composite network structure is suitable for the installation of the upper and lower structures of the miniaturized power amplifier module and can meet various forms of heat dissipation.

[0074] Working method description:

[0075] In order to avoid the problem of 180° phase difference at the ET junction, a symmetrical waveguide hybrid synthesis network is used. The phase differences can offset each other. The signal can be fed from the upper and lower eight E-plane non-standard waveguide ports at the same time, and then the first power synthesis is performed through the E-arm spacer structure 11. The spacer can effectively improve the power distribution between the two paths.

[0076] Furthermore, the signal after the first power synthesis is turned to the waveguide 10 through the magic T branch, and is processed into a 90° corner structure through a step transition, so that the four branches of the magic T are in the same direction, which is convenient for compact installation of the power amplifier module. At the same time, the step design makes the corner transmission characteristics reach the optimal state.

[0077] Furthermore, after the signal makes a 90° turn through the H-plane, the synthesized four-way signal enters the magic T branch gradient waveguide 6 and the magic T four-port matching structure 7. The magic T branch gradient waveguide 6 can increase its working bandwidth, and at the same time, together with the magic T four-port matching structure 7, match the signal power distribution ratio and isolation in the T-type coupling cavity. The magic T four-port matching structure 7 adopts a stepped square column with the top surface facing the direction of the E-plane port, and the bottom surface of the stepped matching square column is located in the opposite direction of the E-plane port. The magic T four-port matching structure 7 is a two-stage structure for easy processing, and the side length of the square column decreases from the bottom to the top surface. The stepped square column design effectively increases the impedance matching bandwidth of the matching square column, improves the port isolation and port standing wave characteristics. The E-plane port is also designed with a gradient waveguide, which can further improve the standing wave of the E-plane port.

[0078] The E-surface port is used to absorb unbalanced power. Traditionally, waveguide loads are used to absorb power, which is large in size and not conducive to miniaturized design. The probe structure 9 of this example uses probe coupling to connect to a 50-ohm resistor for power absorption. By sintering the probe substrate and the load resistor to the cavity wall, it is conducive to miniaturized integrated design. The probe structure is an independent design structure, and the power handling capacity of the 50-ohm resistor can be adjusted according to the power absorbed by the port.

[0079] Furthermore, the signal after the second power synthesis is turned to waveguide 5 through a T-type branch, and is processed into a 90° corner structure again through a step transition. The HT-type power splitter branches in two directions in the same direction, which facilitates the compact installation of eight power amplifier modules with equal spacing. At the same time, the step design makes the corner transmission characteristics reach the optimal state.

[0080] Furthermore, after the signal makes a 90° turn through the H plane, the two synthesized signals enter the H arm branch gradient waveguide 4, pass through the H arm spacer structure 3, synthesize the final power, and finally output through the H arm output gradient waveguide 2 and the H arm output waveguide 1. The eight-way synthesized power output with a bandwidth of 1.6GHz in the X-band is realized, with excellent performance indicators.

[0081] like Figure 4 The insertion loss characteristic curve and the output port return loss characteristic curve of this example.

[0082] like Figure 5 The isolation curves between the ET junctions and the four output ports after synthesis in this example are shown in FIG.

[0083] like Figure 6 This is the return loss curve of the magic T isolation end of this example.

[0084] The X-band waveguide hybrid synthesis network structure of this example is simple, the impedance matching of each port is good, the insertion loss of the eight-way branch is less than 0.3dB, the isolation between the four-way branches after synthesis is greater than 17dB, and it has a wide working bandwidth.

[0085] The hybrid synthesis network of this embodiment can be applied to multi-channel waveguide power amplifier / combining network, has simple structure, small size, and covers a wide frequency band. The matching structure and magic T after cavity division can be processed by one-time milling, which reduces the assembly error when assembling the matching results. The stepped 90-degree corner method is adopted to make the structure of the synthesis network more compact, and the phase and amplitude balance at the output port is very good, and there is good isolation between the isolation ports.

[0086] The above description is only a preferred embodiment of the present invention, and is not intended to be the only one or to limit the present invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A compact waveguide hybrid synthesis network, characterized in that: Includes integrated: Waveguide HT junction; Magic T, there is a pair, symmetrically connected to the branch input end of the waveguide HT junction; and There are two pairs of waveguide ET junctions, which are symmetrically connected to the branch input ends of the magic T; The input end of the waveguide ET junction uses a non-standard waveguide port, and the output end of the waveguide HT junction uses a standard waveguide port; Waveguide ET junctions include: A pair of E-arm input waveguides (12) symmetrically spaced apart, with the E-surfaces thereof using non-standard waveguide ports for serving as radio frequency signal input ends; and An E-arm spacer structure (11) is disposed between a pair of E-arm input waveguides (12) and is used to perform a first power synthesis on the radio frequency signal input from the E-arm input waveguide (12); Magic T includes: A pair of magic T branch steering waveguides (10) are symmetrically arranged, one end of which is connected to the E arm diaphragm structure (11) and is used to perform a 90° steering on the radio frequency signal synthesized by the E arm diaphragm structure (11) in a step transition manner, so as to make the radio frequency signals entering the magic T branch in the same direction; A pair of magic T branch gradient waveguides (6) are symmetrically arranged and respectively connected to the other ends of the corresponding magic T branch steering waveguides (10) to increase the working bandwidth; and A magic T four-port matching structure (7), a pair of magic T branch gradient waveguides (6) are symmetrically connected to both sides of the magic T four-port matching structure (7), and are used to match the signal power distribution ratio and isolation in the T-type coupling cavity together with the magic T branch gradient waveguide (6) to perform a second power synthesis.

2. The compact waveguide hybrid synthesis network according to claim 1, characterized in that: The magic T four-port matching structure (7) adopts a stepped square column structure, with the top surface facing the direction of the port on the E surface, and the bottom surface located in the opposite direction of the port on the E surface. The side length of the stepped square column decreases from the bottom surface to the top surface.

3. The compact waveguide hybrid synthesis network according to claim 1, characterized in that: A load module is vertically arranged on the magic T four-port matching structure (7) for absorbing multi-path unbalanced power; a magic T load port gradient waveguide (8) is arranged on one side of the load module facing the direction of the port of the E surface for matching the standing wave of the load port.

4. The compact waveguide hybrid synthesis network according to claim 3, characterized in that: A probe structure (9) is provided on the side of the load module facing the other magic T, and the probe structure (9) includes: a probe substrate; and a load resistor sintered together with the probe substrate on one side of the load module.

5. The compact waveguide hybrid synthesis network according to claim 1, characterized in that: Waveguide HT junction, including: A pair of T-shaped branch steering waveguides (5) are symmetrically arranged, one end of each of which is connected to a magic T four-port matching structure (7) corresponding to the magic T, and is used to perform a 90° steering on the radio frequency signal synthesized by the magic T, so that the radio frequency signal entering the waveguide HT junction is branched in the same direction; A pair of H-arm branch gradient waveguides (4) are symmetrically arranged and respectively connected to the other ends of the corresponding T-branch steering waveguides (5) to increase the working bandwidth; An H-arm septum structure (3), a pair of H-arm branch gradient waveguides (4) symmetrically connected to both sides of the H-arm septum structure (3), and used for performing a third synthesis of the radio frequency signals transmitted by each magic T; and The H-arm output waveguide (1) is vertically connected to the H-arm spacer structure (3) through the H-arm output gradient waveguide (2) and is used to output the third synthesized radio frequency signal. The H surface of the H-arm output waveguide (1) adopts a standard waveguide port.

6. The compact waveguide hybrid synthesis network according to claim 5, characterized in that: The waveguide ET junction is vertically arranged, a pair of E arm input waveguides (12) are arranged vertically and spaced apart from each other, and the E arm spacer structure (11) is located between the E arm input waveguides (12). The magic T branch steering waveguide (10) is horizontally and vertically connected to the E arm spacer structure (11), and the magic T branch steering waveguide (10) is located in the opposite direction to the E surface port of the E arm input waveguide (12); The H-arm output waveguide (1), the H-arm output gradient waveguide (2), the H-arm spacer structure (3), the H-arm branch gradient waveguide (4), the T-branch steering waveguide (5), the magic T branch gradient waveguide (6), and the magic T four-port matching structure (7) are all located on the same horizontal plane as the magic T branch steering waveguide (10).

7. The compact waveguide hybrid synthesis network according to claim 6, characterized in that: Also includes: The cavity (13) is used to accommodate the integrated waveguide HT junction, a pair of magic T junctions, and two pairs of waveguide ET junctions, and the shape of the cavity (13) matches the overall shape of the integrated waveguide HT junction, a pair of magic T junctions, and two pairs of waveguide ET junctions; The cavity (13) has an output port (14) vertically arranged on one side of the length direction of the cavity (13), and four input ports (18) penetrating the top and bottom surfaces of the cavity (13) at a predetermined distance from the other side; the output port (14) matches the H-arm output waveguide (1), and the input port (18) is used for the E-arm input waveguide (12) of the waveguide ET junction to extend out of the top and bottom surfaces of the cavity (13); Two load cavities (17) are provided on the top surface of the cavity (13) for accommodating the load module and the probe structure (9).

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