Output bent waveguide for traveling wave tube

Abstract

The invention provides an output bent waveguide for a traveling wave tube. The output bent waveguide comprises a transmission assembly and a third component. The transmission assembly comprises a first component and a second component, the first component and the second component define a hollow inner cavity channel, the inner cavity channel sequentially comprises an input section, a middle section and an output section, the input section and the output section extend in the first direction, the middle section extends in the second direction, and the first direction is orthogonal to the second direction. The third component is provided with a through hole, the third component is arranged on the portion, located on the outer side of the output section, of the conveying assembly in a sleeving mode through the through hole, and the third component is in concave-convex fit with the conveying assembly in the first direction so that the third component can be kept on the conveying assembly.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of microwave electron vacuum technology, in particular to an output bend waveguide for a traveling wave tube. BACKGROUND

[0002] The traveling wave tube is a kind of broadband microwave amplifier device, whose working principle is based on the synchronous interaction of the electron beam and the microwave field. The electron beam exchanges energy with the microwave signal propagating in the slow wave structure, thereby converting the kinetic energy of the electron into microwave energy to achieve signal amplification. Its main application fields include satellite communication, radar system, electronic countermeasure and unmanned aerial vehicle communication, etc. The output structure of the traveling wave tube is mostly standard rectangular waveguide output, which is convenient for connecting with subsequent microwave systems. In recent years, as the working frequency of the traveling wave tube gradually increases, the product size also becomes smaller as a whole. Considering the packaging and other factors, the flange corresponding to the output structure cannot be designed as a standard flange. It is necessary to convert the non-standard flange interface into a standard flange interface. At the same time, the direction requirement of the output interface in most traveling wave tube technology requirements is vertical upward, and due to the space reason of the packaging piece, the output interface needs to be translated horizontally. In the related technology, the solution is to use a soft waveguide for connection or to use two ordinary output bend waveguides for connection in turn.

[0003] However, when using a soft waveguide for connection, because the translation distance is less than 50mm, the soft waveguide is severely bent and has large loss, so this scheme cannot be used; when using two ordinary output bend waveguides for connection in turn, the output direction is first bent to horizontal, and then the output direction is bent to upward. This scheme cannot be used because of the risk of introducing reflection points due to intermediate connection, and because the translation distance is small, the bending distance is not enough. SUMMARY

[0004] To solve the above and other aspects of at least one technical problem in the prior art, embodiments of the present disclosure provide an output bend waveguide for a traveling wave tube, which includes a transmission assembly and a third component. The transmission assembly includes a first component and a second component, and the first component and the second component enclose a hollow inner cavity channel. The inner cavity channel sequentially includes an input section, an intermediate section and an output section. The input section and the output section extend along a first direction, and the intermediate section extends along a second direction. The first direction is orthogonal to the second direction. The third component is provided with a through hole, and the third component is sleeved on the part of the transmission assembly located outside the output section through the through hole, and forms a concave-convex fit with the transmission assembly along the first direction, so that the third component is retained on the transmission assembly.

[0005] Optionally, the first component and the second component are detachably connected.

[0006] Optionally, the first component comprises a first bottom plate, a first body portion and a first protruding column. The first body portion is arranged on the first bottom plate and protrudes from the first bottom plate along a first direction. The first protruding column is arranged on the first body portion and protrudes from the first body portion along the first direction. The first protruding column, the first body portion and the first bottom plate are provided with a through slot in communication, the through slot being recessed in the first component along a third direction, the third direction being perpendicular to the first direction and the second direction.

[0007] Optionally, the second component comprises a second bottom plate, a second body portion and a second protruding column. The second body portion is arranged on the second bottom plate and protrudes from the second bottom plate along the first direction. The second protruding column is arranged on the second body portion and protrudes from the second body portion along the first direction. When the first component and the second component are in an assembled state, the second component covers the through slot, and a wall surface of the second component facing the first component defines an inner cavity passage with an inner side of the through slot.

[0008] Optionally, the first body portion is provided with a first mesa around a portion of the first protruding column. The second body portion is provided with a second mesa around a portion of the second protruding column. When the first component and the second component are in the assembled state, the first mesa and the second mesa are coplanar, and a third component sleeved outside the transmission assembly abuts against an end surface formed by the first mesa and the second mesa.

[0009] Optionally, the first component is provided with a first fitting surface, and the second component is provided with a second fitting surface facing the first fitting surface, and the first fitting surface and the second fitting surface are arranged flat.

[0010] Optionally, the first component is provided with a first connecting hole penetrating the first fitting surface, and the second component is provided with a second connecting hole penetrating the second fitting surface. The transmission assembly further comprises a connecting piece. The connecting piece is detachably arranged on the first component and the second component. When the first component and the second component are in the assembled state, the first fitting surface and the second fitting surface are tightly fitted, and the connecting piece is arranged in the first connecting hole and the second connecting hole.

[0011] Optionally, a portion of the input section is formed on the first bottom plate, and another portion of the input section is formed on the first body portion. A portion of the output section is formed on the first protruding column, and another portion of the output section is formed on the first body portion. The intermediate section is formed on the first body portion.

[0012] Optionally, the first component further comprises an input inclined inner wall and an output inclined inner wall. The input inclined inner wall is arranged on a connecting portion of the input section and the intermediate section in the through slot. The output inclined inner wall is arranged on a connecting portion of the output section and the intermediate section in the through slot.

[0013] Optionally, a wall surface formed by the input inclined inner wall and / or the output inclined inner wall forms an included angle with the first direction and the second direction, and an extension direction is parallel to the third direction.

[0014] According to the output bend waveguide for the traveling wave tube provided in the present disclosure, an inner cavity channel is formed by the first part and the second part of the transmission assembly, wherein the input section and the output section both extend along a first direction, the input section can be used to receive the microwave signal when the microwave signal amplified by the slow wave system of the traveling wave tube is output along the first direction, the intermediate section extends along a second direction perpendicular to the first direction, the microwave signal realizes continuous transmission along the second direction, and the transmission direction is changed again by the output section to realize transmission along the first direction to the external load, so that when the internal installation environment of the traveling wave tube is compact, the output interface of the microwave signal can realize translation along the second direction. On the one hand, the microwave signal is transmitted through the rigid inner cavity channel, which is conducive to avoiding the bending loss problem of the soft waveguide from the structure; on the other hand, the microwave signal can be transmitted by a single transmission assembly, without the need for two output bend waveguides to be connected in sequence, so that the overall structure is more compact and lighter, and the first part and the second part form an integrated structure, without intermediate connection links, which reduces the reflection points, and facilitates flexible adjustment of the length of the intermediate section, which is conducive to matching different translation distances of the output interface of the microwave signal, especially in the case of short translation distance, which is conducive to avoiding the problem of insufficient bending distance of the output bend waveguide in the related art. Further, when the internal installation environment of the traveling wave tube is compact, the flange corresponding to the output structure cannot be designed as a standard flange, the output interface of the microwave signal is first translated along the second direction, and then the third part is sleeved on the part of the transmission assembly located outside the output section through the through hole, the third part can be connected to the standard flange, and does not hinder the output of the microwave signal along the output section, so that the output interface is converted into a standard flange interface without changing the output direction of the microwave signal, which facilitates the connection of the output interface and the subsequent microwave system, and is conducive to stable transmission of the microwave signal to the external load. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which:

[0016] Figure 1 A structure schematic diagram of the output bend waveguide for the traveling wave tube according to an embodiment of the present disclosure is schematically shown;

[0017] Figure 2 A structure schematic diagram of the third part according to an embodiment of the present disclosure is schematically shown;

[0018] Figure 3 A schematic diagram of the first part from a certain perspective according to an embodiment of the present disclosure is schematically shown;

[0019] Figure 4 A schematic diagram of the first part from another perspective according to an embodiment of the present disclosure is schematically shown;

[0020] Figure 5 Fig. 2 schematically illustrates a view of the second component according to an embodiment of the present disclosure;

[0021] Figure 6 Fig. 3 schematically illustrates another view of the second component according to an embodiment of the present disclosure;

[0022] Figure 7 Fig. 4 schematically illustrates a view of a simulation model of the inner cavity passage according to an embodiment of the present disclosure;

[0023] Figure 8 Fig. 5 schematically illustrates a view of a simulation result of the inner cavity passage according to an embodiment of the present disclosure.

[0024] In the drawings, the following reference signs have the following meanings:

[0025] 1 - first component; 11 - first bottom plate; 111 - fifth connecting hole; 12 - first body part; 121 - first table surface; 1211 - seventh connecting hole; 122 - first empty part; 123 - first through slot; 13 - first protruding column; 14 - first fitting surface; 141 - first connecting hole; 15 - through slot; 151 - input slot; 152 - input inclined inner wall; 153 - middle slot; 154 - output inclined inner wall; 155 - output slot; 2 - second component; 21 - second bottom plate; 211 - sixth connecting hole; 22 - second body part; 221 - second table surface; 2211 - eighth connecting hole; 222 - second empty part; 223 - second through slot; 224 - third through slot; 23 - second protruding column; 24 - second fitting surface; 241 - second connecting hole; 3 - inner cavity passage; 4 - third component; 41 - through hole; 42 - third connecting hole; 43 - fourth connecting hole; 5 - connecting edge plate; 51 - ninth connecting hole. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions, and advantages of the present disclosure clearer, the following will further describe the present disclosure with reference to the embodiments and the accompanying drawings.

[0027] The terms used herein are merely used to describe specific embodiments, and are not intended to limit the present disclosure. The terms "include", "comprise", and the like used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0028] All terms used herein, including technical and scientific terms, have the meanings commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having meanings consistent with the context of the present specification, and should not be interpreted in an idealized or overly formal manner.

[0029] In the case where expressions such as "at least one of A, B, and C, etc." are used, it generally should be interpreted to include any of one or more of A, B, and C, etc. on its own, a combination of at least one of the items A, B, and C, etc., etc. In the case where expressions such as "at least one of A, B, or C, etc." are used, it generally should be interpreted to include any of one or more of A, B, or C, etc. on its own, a combination of at least one of the items A, B, and C, etc., etc.

[0030] It is also to be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only the directions of the drawings for reference, and are not intended to limit the protection scope of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. When it is possible to cause confusion in the understanding of the present disclosure, the conventional structures or configurations will be omitted.

[0031] Figure 1 A structure schematic diagram of an output bend waveguide for a traveling wave tube according to an embodiment of the present disclosure is schematically shown. Figure 2 A structure schematic diagram of a third component according to an embodiment of the present disclosure is schematically shown.

[0032] As Figures 1-2 shown, the present disclosure provides an output bend waveguide for a traveling wave tube, comprising a transmission assembly and a third component 4. The transmission assembly comprises a first component 1 and a second component 2, and the first component 1 and the second component 2 enclose a hollow inner cavity channel 3. The inner cavity channel 3 comprises an input section, an intermediate section, and an output section in sequence. The input section and the output section extend along a first direction, and the intermediate section extends along a second direction. The first direction is orthogonal to the second direction. The third component 4 is provided with a through hole 41. The third component 4 is sleeved on the part of the transmission assembly located outside the output section through the through hole 41, and forms a concave-convex fit with the transmission assembly along the first direction, so as to keep the third component 4 on the transmission assembly.

[0033] Specifically, referring to Figure 1The first direction includes, but is not limited to, being set as consistent with the direction of the X-axis, and the second direction includes, but is not limited to, being set as consistent with the direction of the Y-axis. The cross-sectional shape of the inner cavity channel 3 includes, but is not limited to, being set as a rectangle, and the inner cavity channel 3 includes, but is not limited to, being set as a standard BJ400 waveguide size. The material of the first component 1, the second component 2, and the third component 4 includes, but is not limited to, being set as aluminum plated with gold. The part of the transmission assembly located outside the output section is embedded in the through hole 41 of the third component 4, and one side of the third component 4 is connected to the first component 1 and the second component 2, and the other side is connected to a standard flange, thereby realizing the relative fixation of the third component 4 and the transmission assembly.

[0034] The cross-sectional shape of the third component 4 includes, but is not limited to, being set as a circle, and the outer diameter is set as a standard flange size. The through hole 41 is arranged in the middle of the third component 4. The cross-sectional shape of the through hole 41 matches the part of the transmission assembly located outside the output section, and includes, but is not limited to, being set as a rectangle.

[0035] The third component 4 is further provided with a third connecting hole 42 and a fourth connecting hole 43, which are arranged along the ring direction of the third component 4. The third connecting hole 42 is used for connecting the third component 4 to the first component 1 and the second component 2, and includes, but is not limited to, being set as a threaded hole in the inner wall of the third connecting hole 42, and being connected by a screw. The fourth connecting hole 43 is used for connecting the third component 4 to a standard flange, and the shape and size of the fourth connecting hole 43 match the mounting hole of the standard flange.

[0036] In such an embodiment, the inner cavity channel 3 is formed by the first part 1 and the second part 2 of the transmission assembly, wherein the input section and the output section both extend along a first direction, the input section can be used to receive the microwave signal when the microwave signal amplified by the slow wave system of the traveling wave tube is output along the first direction, the intermediate section extends along a second direction which is orthogonal to the first direction, the microwave signal is transmitted along the second direction, and the transmission direction is changed again by the output section to be transmitted along the first direction to the external load, so that the output interface of the microwave signal can be translated along the second direction when the internal installation environment of the traveling wave tube is compact. On the one hand, the microwave signal is transmitted through the rigid inner cavity channel 3, which is beneficial to avoid the bending loss problem of the soft waveguide from the structure; on the other hand, the microwave signal can be transmitted by a single transmission assembly without the need for two output bend waveguides to be connected in sequence, so that the overall structure is more compact and lighter, and the first part 1 and the second part 2 form an integrated structure, without intermediate connection links, which reduces the reflection points, and facilitates the flexible adjustment of the length of the intermediate section, which is beneficial to match the different translation distances of the output interface of the microwave signal, especially in the case of short translation distance, which is beneficial to avoid the problem of insufficient bending distance of the output bend waveguide in the related art. Further, when the internal installation environment of the traveling wave tube is compact, the flange corresponding to the output structure cannot be designed as a standard flange, the output interface of the microwave signal is first translated along the second direction, and then the third part 4 is sleeved on the part of the transmission assembly located outside the output section through the through hole 41, the third part 4 can be connected to the standard flange, and does not hinder the output of the microwave signal along the output section, so that the output interface is converted into a standard flange interface without changing the output direction of the microwave signal, which facilitates the connection of the output interface and the subsequent microwave system, and is beneficial to the stable transmission of the microwave signal to the external load.

[0037] Figure 3 A schematic view of the first part according to an embodiment of the present disclosure is shown from a certain perspective. Figure 4 A schematic view of the first part according to an embodiment of the present disclosure is shown from another perspective.

[0038] As shown in Figures 3-4 , the first part 1 and the second part 2 are detachably connected. The first part 1 includes a first bottom plate 11, a first main body part 12, and a first protruding column 13. The first main body part 12 is arranged on the first bottom plate 11 and protrudes from the first bottom plate 11 along a first direction. The first protruding column 13 is arranged on the first main body part 12 and protrudes from the first main body part 12 along the first direction. The first protruding column 13, the first main body part 12, and the first bottom plate 11 are provided with a through groove 15 in communication, and the through groove 15 is recessed in the first part 1 along a third direction, and the third direction is orthogonal to the first direction and the second direction.

[0039] Specifically, referring to Figure 1The third direction is set to be consistent with the direction of the Z axis when the first direction is set to be consistent with the direction of the X axis and the second direction is set to be consistent with the direction of the Y axis in the spatial rectangular coordinate system shown in the figure. The cross-sectional shape of the first bottom plate 11 includes but is not limited to being set to be rectangular. The plane normal of the first bottom plate 11 is along the first direction, and the edges of the first bottom plate 11 are chamfered. The first bottom plate 11 is provided with a fifth connecting hole 111 for connecting the first bottom plate 11 to the output interface of the traveling wave tube to receive the microwave signal amplified by the slow wave system in the traveling wave tube. The shape and size of the fifth connecting hole 111 are matched with the output interface of the traveling wave tube.

[0040] Further, the slot 15 is formed into a first opening surface on the end surface of the first bottom plate 11 away from the first main body part 12, which constitutes the input port of the inner cavity channel 3 when the first part 1 and the second part 2 are combined. The slot 15 is also formed into a second opening surface on the end surface of the first protruding column 13 away from the first main body part 12, which constitutes the output port of the inner cavity channel 3 when the first part 1 and the second part 2 are combined.

[0041] In such an embodiment, the first part 1 is set to have the first bottom plate 11, the first main body part 12 and the first protruding column 13 protruding in the first direction in sequence, and the through slot 15 is provided on the three parts to be connected and communicated, which provides a structural carrier for the formation of the inner cavity channel 3. When the first part 1 and the second part 2 are combined, the first bottom plate 11 can be connected to the output interface of the traveling wave tube, and the first bottom plate 11 can constitute the input port of the inner cavity channel 3, the first protruding column 13 can be embedded into the through hole 41 of the third part 4, and the first protruding column 13 can constitute the output port of the inner cavity channel 3. The microwave signal output by the traveling wave tube can enter the inner cavity channel 3 from the input port and be transmitted to the output port along the extension direction of the inner cavity channel 3, which is conducive to realizing the reliable connection of the transmission assembly with the output interface of the traveling wave tube and the subsequent microwave system, and reducing the loss in the process of microwave signal transmission.

[0042] Figure 5 An illustrative view of the second part according to an embodiment of the present disclosure is shown from a certain perspective. Figure 6 An illustrative view of the second part according to an embodiment of the present disclosure is shown from another perspective.

[0043] As Figures 5-6As shown, the second component 2 includes a second bottom plate 21, a second body portion 22 and a second protruding column 23. The second body portion 22 is disposed on the second bottom plate 21 and protrudes from the second bottom plate 21 along the first direction. The second protruding column 23 is disposed on the second body portion 22 and protrudes from the second body portion 22 along the first direction. When the first component 1 and the second component 2 are in the assembled state, the second component 2 covers the through slot 15, and the wall surface of the second component 2 facing the first component 1 and the inner side of the through slot 15 define the inner cavity passage 3. The first body portion 12 is provided with a first mesa 121 around a portion of the first protruding column 13. The second body portion 22 is provided with a second mesa 221 around a portion of the second protruding column 23. When the first component 1 and the second component 2 are in the assembled state, the first mesa 121 and the second mesa 221 are coplanar, and the third component 4 sleeved outside the transmission assembly abuts against the end surface formed by the first mesa 121 and the second mesa 221.

[0044] Specifically, the cross-sectional shape of the second bottom plate 21 includes but is not limited to a rectangle. The plane normal of the second bottom plate 21 is along the first direction, and the edges of the second bottom plate 21 are rounded. The second bottom plate 21 is provided with a sixth connecting hole 211 for connecting the second bottom plate 21 to the output interface of the traveling wave tube to receive the microwave signal amplified by the slow wave system in the traveling wave tube. The shape and size of the sixth connecting hole 211 are matched with the output interface of the traveling wave tube.

[0045] Further, the first component 1 is provided with a seventh connecting hole 1211 penetrating the first mesa 121, and the second component 2 is provided with an eighth connecting hole 2211 penetrating the second mesa 221. The shape and size of the seventh connecting hole 1211 and the eighth connecting hole 2211 are matched with the third connecting hole 42 provided on the third component 4, and both include but are not limited to that a thread is provided on the inner wall of the hole. The third component 4 is fixedly connected with the first component 1 by simultaneously penetrating the third connecting hole 42 and the seventh connecting hole 1211 with a screw, and the third component 4 is fixedly connected with the second component 2 by simultaneously penetrating the third connecting hole 42 and the eighth connecting hole 2211 with a screw.

[0046] In such an embodiment, the second component 2 is provided with the second bottom plate 21, the second main body 22 and the second protruding column 23 protruding in the first direction in sequence, the second bottom plate 21 can be surrounded by the first bottom plate 11, the second main body 22 can be surrounded by the first main body 12, and the second protruding column 23 can be surrounded by the first protruding column 13, so that when the first component 1 and the second component 2 are in the assembled state, the second component 2 can cover the inner cavity passage 3 formed by the groove 15, and the microwave signal output by the traveling wave tube is constrained inside the transmission assembly and continues to transmit along the inner cavity passage 3, which is conducive to ensuring the continuous and efficient transmission of the transmission assembly between the traveling wave tube and the subsequent microwave system, helping to complete the translation of the output interface of the microwave signal, facilitating the improvement of the structure of the output interface in the later stage, and improving the universality of the output structure. In addition, by providing the first table 121 and the second table 221, the third component 4 can be stably arranged in the transmission assembly, the third component 4 and the transmission assembly can be stably connected, and the direction of the microwave signal output from the inner cavity passage 3 can be prevented from deviating, thereby improving the quality of the microwave signal received by the subsequent microwave system.

[0047] According to the embodiments of the present disclosure, the first component 1 is provided with a first fitting surface 14, the second component 2 is provided with a second fitting surface 24 facing the first fitting surface 14, and the first fitting surface 14 and the second fitting surface 24 are flatly arranged. The first component 1 is provided with a first connecting hole 141 penetrating the first fitting surface 14, and the second component 2 is provided with a second connecting hole 241 penetrating the second fitting surface 24. The transmission assembly further comprises a connecting piece. The connecting piece is detachably arranged on the first component 1 and the second component 2. When the first component 1 and the second component 2 are in the assembled state, the first fitting surface 14 and the second fitting surface 24 are tightly fitted, and the connecting piece is arranged in the first connecting hole 141 and the second connecting hole 241.

[0048] Specifically, the position of the first connecting hole 141 corresponds to the position of the second connecting hole 241. The shape and size of the first connecting hole 141 and the second connecting hole 241 are matched with the connecting piece, which includes but is not limited to being provided with threads on the inner wall of the hole, and the connecting piece includes but is not limited to being provided as a screw, and the screw is arranged in the first connecting hole 141 and the second connecting hole 241 at the same time to realize the fixed connection of the first component 1 and the second component 2.

[0049] In such an embodiment, through the flat design and close fit of the first fit surface 14 and the second fit surface 24, the gap between the first component 1 and the second component 2 is eliminated, the leakage of microwave signals into the inner cavity passage 3 is reduced, and the sealing degree of the transmission assembly is improved. At the same time, through the cooperation of the first connecting hole 141, the second connecting hole 241 and the connecting piece corresponding to the positions, the fastening connection of the first component 1 and the second component 2 is realized, which is beneficial to ensure the structural firmness of the transmission assembly during operation, and to avoid separation of the first component 1 and the second component 2 due to vibration. The connection of the first component 1 and the second component 2 is convenient to disassemble, and is convenient for later maintenance (such as cleaning and repair) of the inner cavity passage 3.

[0050] According to the embodiments of the present disclosure, the transmission assembly further comprises at least four connecting edge plates 5. The at least four connecting edge plates 5 are respectively arranged on the first component 1 and the second component 2, are symmetrically distributed, and are distributed away from the first fit surface 14 and the second fit surface 24. The connecting edge plates 5 on the first component 1 protrude from the first bottom plate 11 along a third direction and are spaced apart along a second direction. The connecting edge plates 5 on the second component 2 protrude from the second bottom plate 21 along a fourth direction and are spaced apart along the second direction. The fourth direction is parallel to the third direction and opposite in direction. The at least four connecting edge plates 5 are each provided with a ninth connecting hole 51. The shape and size of the ninth connecting hole 51 match the mounting hole of the packaging piece of the traveling wave tube, including but not limited to being provided with a thread on the inner wall of the hole and being combined with a screw to realize the fixed connection of the transmission assembly and the traveling wave tube.

[0051] Further, the first main body part 12 further comprises a first empty part 122 and a first through slot 123. The first empty part 122 is recessed in the first main body part 12 along the fourth direction and the second direction. The first through slot 123 is located between the first empty part 122 and the first main body part 12, is recessed in the first main body part 12 along the fourth direction, and the first through slot 123 is coaxial with the fifth connecting hole 111. The second main body part 22 further comprises a second empty part 222, a second through slot 223 and a third through slot 224. The second empty part 222 is recessed in the second main body part 22 along the third direction and the second direction. The second through slot 223 is located between the second empty part 222 and the second main body part 22, is recessed in the second main body part 22 along the third direction, and the second through slot 223 is coaxial with the sixth connecting hole 211. The third through slot 224 is located between the second empty part 222 and the second bottom plate 21, is recessed in the second bottom plate 21 along a fifth direction, the fifth direction is parallel to the first direction and opposite in direction, and the third through slot 224 is coaxial with the second connecting hole 241.

[0052] In such an embodiment, the first main body 12 is provided with the first empty part 122 and the first through slot 123, when the first bottom plate 11 is connected to the output interface of the traveling wave tube through the fifth connecting hole 111, the structure of the first main body 12 does not block the installation and removal of the connecting components such as screws, thereby improving the convenience of use of the first component 1. The second main body 22 is provided with the second empty part 222, the second through slot 223 and the third through slot 224, when the second bottom plate 21 is connected to the output interface of the traveling wave tube through the sixth connecting hole 211, the structure of the second main body 22 does not block the installation and removal of the connecting components such as screws, thereby improving the convenience of use of the second component 2, and when assembling the first component 1 and the second component 2, the structure of the second main body 22 and the second bottom plate 21 does not block the installation and removal of the connecting components through the first connecting hole 141 and the second connecting hole 241, thereby facilitating the assembly and disassembly of the transmission assembly.

[0053] According to the embodiment of the present disclosure, a part of the input section is formed on the first bottom plate 11, and another part of the input section is formed on the first main body 12. A part of the output section is formed on the first protruding column 13, and another part of the output section is formed on the first main body 12. The intermediate section is formed on the first main body 12.

[0054] Specifically, the through slot 15 includes an input slot 151, an intermediate slot 153 and an output slot 155. The input slot 151 is recessed in the first bottom plate 11 and the first main body 12 along the third direction, the intermediate slot 153 is recessed in the first main body 12 along the third direction, and the output slot 155 is recessed in the first main body 12 and the first protruding column 13 along the third direction. The two ends of the intermediate slot 153 are respectively communicated to the input slot 151 and the output slot 155.

[0055] Further, when the first component 1 and the second component 2 are combined, the second fitting surface 24 covers the opening surface formed by the through slot 15 on the first fitting surface 14, that is, the input section, the intermediate section and the output section are respectively composed of the input slot 151, the intermediate slot 153 and the output slot 155.

[0056] In such an embodiment, by specifying the formation position of the input slot 151, the intermediate slot 153 and the output slot 155 on the first component 1, it is beneficial to ensure that the input section, the intermediate section and the output section are accurately connected, and it is beneficial to avoid reflection or loss of microwave signals in the transmission process due to discontinuous connection. At the same time, combined with the shape of the opening surface formed by the through slot 15 on the first fitting surface 14, a specific reference is provided for the coverage range of the second component 2, so that after the first component 1 and the second component 2 are assembled, the first component 1 and the second component 2 can jointly form an inner cavity channel 3 with uniform cross-sectional size and continuous path, thereby ensuring the stability and reliability of the microwave signal transmission process.

[0057] Figure 7 Fig. 2 schematically shows a simulation model of the inner cavity channel according to an embodiment of the present disclosure. Figure 8 Fig. 3 schematically shows a simulation result of the inner cavity channel according to an embodiment of the present disclosure.

[0058] As shown in Fig. 1, the first component 1 further comprises an input inclined inner wall 152 and an output inclined inner wall 154. The input inclined inner wall 152 is arranged at the connecting portion of the input section and the intermediate section within the through slot 15. The output inclined inner wall 154 is arranged at the connecting portion of the output section and the intermediate section within the through slot 15. The wall surface formed by the input inclined inner wall 152 and / or the output inclined inner wall 154 forms an included angle with the first direction and the second direction, and the extending direction is parallel to the third direction. Figures 7-8 Specifically, the included angle between the normal direction of the wall surface formed by the input inclined inner wall 152 and / or the output inclined inner wall 154 and the first direction, and the included angle between the normal direction of the wall surface formed by the input inclined inner wall 152 and / or the output inclined inner wall 154 and the second direction are not limited to 45°. Further, the simulation analysis of the inner cavity channel 3 is completed by establishing a physical model of the inner cavity channel 3 in simulation software, setting excitation, setting analysis parameters, simulation calculation and processing of the calculation results. In the simulation calculation result, the horizontal coordinate represents the frequency, with the unit of GHz, and the vertical coordinate represents the voltage standing wave ratio. Referring to the red curve in Fig. 3, when the frequency is in the range of 36-44 GHz, the voltage standing wave ratio is less than 1.05, indicating that the output bend waveguide for the traveling wave tube provided by the present disclosure meets the use requirements. In addition, the structure of the output bend waveguide for the traveling wave tube provided by the present disclosure has been verified in the actual Q-band traveling wave tube product, and the performance indicators can meet the expected requirements.

[0059] Figure 8 In such an embodiment, by arranging the input inclined inner wall 152 at the connecting position of the input section and the intermediate section, and arranging the output inclined inner wall 154 at the connecting position of the output section and the intermediate section, the right-angle corner in the inner cavity channel 3 is converted into an inclined corner, which is beneficial to avoid strong reflection of the microwave signal at the right-angle corner due to boundary mutation. At the same time, the inclined corner can improve the smoothness in the process of changing the transmission direction of the microwave signal, reduce the probability of distortion and energy waste of the microwave signal, and reduce the reflection loss and the loss in the turning process during the transmission of the microwave signal, thereby improving the transmission efficiency and reliability of the transmission assembly, and being beneficial to guarantee the purity of the microwave signal received by the subsequent microwave system.

[0060] In such an embodiment, by arranging the input inclined inner wall 152 at the connecting position of the input section and the intermediate section, and arranging the output inclined inner wall 154 at the connecting position of the output section and the intermediate section, the right-angle corner in the inner cavity channel 3 is converted into an inclined corner, which is beneficial to avoid strong reflection of the microwave signal at the right-angle corner due to boundary mutation. At the same time, the inclined corner can improve the smoothness in the process of changing the transmission direction of the microwave signal, reduce the probability of distortion and energy waste of the microwave signal, and reduce the reflection loss and the loss in the turning process during the transmission of the microwave signal, thereby improving the transmission efficiency and reliability of the transmission assembly, and being beneficial to guarantee the purity of the microwave signal received by the subsequent microwave system.

[0061] ​The above describes embodiments of the present disclosure. However, these embodiments are merely for illustrative purposes, and are not intended to limit the scope of the present disclosure. Although each embodiment is described above separately, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Those skilled in the art can make various substitutions and modifications without departing from the scope of the present disclosure, and these substitutions and modifications should all fall within the scope of the present disclosure.

Claims

1. An output bent waveguide for a traveling wave tube, characterized in that, include: The transmission component includes a first component (1) and a second component (2). The first component (1) and the second component (2) together form a hollow inner cavity channel (3). The inner cavity channel (3) sequentially includes an input section, an intermediate section and an output section. The input section and the output section extend along a first direction, and the intermediate section extends along a second direction. The first direction and the second direction are orthogonal. The third component (4) is provided with a through hole (41). The third component (4) is sleeved on the part of the transmission component located outside the output section through the through hole (41) and forms a concave-convex fit with the transmission component along the first direction so that the third component (4) is held on the transmission component.

2. The output bent waveguide for a traveling wave tube according to claim 1, characterized in that, The first component (1) and the second component (2) are detachably connected.

3. The output bent waveguide for traveling wave tubes according to claim 2, characterized in that, The first component (1) includes: First base plate (11); The first main body (12) is disposed on the first base plate (11) and protrudes from the first base plate (11) along the first direction; A first protruding post (13) is disposed on the first main body portion (12) and protrudes from the first main body portion (12) along the first direction; The first protruding post (13), the first main body (12) and the first base plate (11) are provided with a through groove (15) that is connected to each other. The through groove (15) is recessed into the first component (1) along a third direction. The third direction is orthogonal to both the first direction and the second direction.

4. The output bent waveguide for a traveling wave tube according to claim 3, characterized in that, The second component (2) includes: Second base plate (21); The second main body (22) is disposed on the second base plate (21) and protrudes from the second base plate (21) along the first direction; The second protruding post (23) is disposed on the second main body part (22) and protrudes from the second main body part (22) along the first direction; When the first component (1) and the second component (2) are in an assembled state, the second component (2) covers the through groove (15), and the wall surface of the second component (2) facing the first component (1) and the inside of the through groove (15) define the inner cavity channel (3).

5. The output bent waveguide for a traveling wave tube according to claim 4, characterized in that, The first main body (12) has a first platform (121) around the first protruding post (13); The second main body (22) is provided with a second platform (221) around the second protrusion (23). When the first component (1) and the second component (2) are in the assembly state, the first platform (121) and the second platform (221) are coplanar. The third component (4), which is sleeved outside the transmission component, abuts against the end face formed by splicing the first platform (121) and the second platform (221).

6. The output bent waveguide for a traveling wave tube according to claim 4, characterized in that, The first component (1) is provided with a first bonding surface (14), and the second component (2) is provided with a second bonding surface (24) facing the first bonding surface (14). The first bonding surface (14) and the second bonding surface (24) are flat.

7. The output bent waveguide for a traveling wave tube according to claim 6, characterized in that, The first component (1) is provided with a first connecting hole (141) penetrating the first mating surface (14), and the second component (2) is provided with a second connecting hole (241) penetrating the second mating surface (24); The transmission component further includes: A connector is detachably disposed on the first component (1) and the second component (2); When the first component (1) and the second component (2) are in an assembled state, the first mating surface (14) and the second mating surface (24) are tightly mated, and the connector passes through the first connecting hole (141) and the second connecting hole (241).

8. The output bent waveguide for a traveling wave tube according to claim 4, characterized in that, A portion of the input segment is formed on the first base plate (11), and another portion of the input segment is formed on the first main body (12); A portion of the output segment is formed on the first protrusion (13), and another portion of the output segment is formed on the first main body (12); The intermediate segment is formed in the first main body (12).

9. The output bent waveguide for a traveling wave tube according to claim 4, characterized in that, The first component (1) further includes: An inclined inner wall (152) is provided in the connecting part of the input section and the intermediate section within the through groove (15); An inclined inner wall (154) is provided in the connection part of the output section and the intermediate section within the through groove (15).

10. The output bent waveguide for a traveling wave tube according to claim 9, characterized in that, The wall surface formed by the input inclined inner wall (152) and / or the output inclined inner wall (154) forms an angle with the first direction and the second direction, and the extension direction is parallel to the third direction.

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