Magnetron structure

Abstract

The application provides a magnetron structure. The magnetron structure comprises a main body part having a containing cavity; the main body part has a plurality of vane parts which are arranged at intervals around the containing cavity; a gap between two adjacent vane parts forms a resonant cavity; the resonant cavity is arranged in communication with the containing cavity; a mounting groove and a diaphragm belt, the mounting groove is arranged on the plurality of vane parts and is in communication with the resonant cavity to form an annular groove; the diaphragm belt is arranged in the mounting groove; wherein the mounting groove comprises a shallow groove section and a deep groove section, along the extension direction of the containing cavity, the depth of the deep groove section is greater than the depth of the shallow groove section; the shallow groove section and the deep groove section are at least two, and the shallow groove section and the deep groove section are arranged alternately at intervals. Through the technical scheme provided by the application, the technical problem of poor support stability of the structure for supporting the diaphragm belt in the magnetron in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of magnetron technology, and more specifically, to a magnetron structure. Background Technology

[0002] Currently, the diaphragm band in S-band pulse magnetrons plays a crucial role, and its performance directly affects key indicators such as the magnetron's output power and frequency stability.

[0003] However, existing diaphragm belts may experience fatigue damage and crack propagation during long-term use. Because magnetrons typically operate at high power and high frequency, the diaphragm belt must withstand significant mechanical stress and electromagnetic forces, making it prone to fatigue failure. Existing diaphragm belt support structures are simple groove-like structures directly connected to the belt. This type of structure has low mechanical strength, is easily broken, and can alter the double-ring structure of the diaphragm belt, resulting in poorer pattern separation and affecting the operational stability of the magnetron. Summary of the Invention

[0004] The main objective of this invention is to provide a magnetron structure to solve the technical problem of poor support stability of the structure used to support the diaphragm belt in the prior art magnetron.

[0005] To achieve the above objectives, the present invention provides a magnetron structure, comprising:

[0006] The main body has a receiving cavity; the main body has multiple fan blades, which are spaced apart around the receiving cavity; the gap between two adjacent fan blades forms a resonant cavity; the resonant cavity is connected to the receiving cavity.

[0007] The mounting groove and diaphragm strip are provided. The mounting groove is set on multiple fan blades and communicates with the resonant cavity to form an annular groove. The diaphragm strip is used to be set inside the mounting groove.

[0008] The installation groove includes a shallow groove section and a deep groove section. Along the extension direction of the receiving cavity, the depth of the deep groove section is greater than the depth of the shallow groove section. There are at least two shallow groove sections and two deep groove sections, which are alternately arranged.

[0009] Furthermore, the shallow groove section is disposed on one of two adjacent fan blade sections, and the deep groove section is disposed on the other of two adjacent fan blade sections; and / or,

[0010] One end of the shallow slot section is connected to one of the two adjacent resonant cavities, and the other end of the shallow slot section is connected to the other of the two adjacent resonant cavities; and / or,

[0011] One end of the deep groove section is connected to one of the two adjacent resonant cavities, and the other end of the deep groove section is connected to the other of the two adjacent resonant cavities.

[0012] Furthermore, the depth of the deep trench section is greater than or equal to 2.5 mm and less than or equal to 3 mm; and / or,

[0013] The depth of the shallow trench section is greater than or equal to 0.8 mm and less than or equal to 1.3 mm; and / or,

[0014] The width of the deep or shallow trench section is greater than or equal to 1 mm and less than or equal to 2 mm.

[0015] Furthermore, there are at least two mounting slots, one of which is a first mounting slot and the other is a second mounting slot, with the first mounting slot located on the side of the second mounting slot away from the receiving cavity;

[0016] Wherein, the shallow groove section of the first mounting groove and the shallow groove section of the second mounting groove are staggered; and / or,

[0017] The deep groove sections of the first mounting slot and the second mounting slot are staggered.

[0018] Furthermore, the distance between the first mounting slot and the second mounting slot is greater than or equal to 1.8 mm and less than or equal to 2.5 mm; and / or,

[0019] Along the circumferential direction of the first mounting groove, the first mounting groove and the second mounting groove are set at equal intervals.

[0020] Furthermore, there are at least two diaphragm belts, one of which is a first diaphragm belt and the other is a second diaphragm belt. The first diaphragm belt is used to be disposed in the first mounting groove, and the second diaphragm belt is used to be disposed in the second mounting groove.

[0021] Furthermore, the diaphragm belt includes at least two first diaphragm segments and at least two second diaphragm segments, with the first diaphragm segments and the second diaphragm segments alternately connected;

[0022] Wherein, one side of the first diaphragm segment is flush with one side of the second diaphragm segment, and the other side of the first diaphragm segment protrudes beyond the other side of the second diaphragm segment; and / or,

[0023] The first diaphragm section and the deep groove section are fitted with a clearance; at least a portion of the second diaphragm section is fitted with a clearance.

[0024] Furthermore, the resonant cavity includes a first cavity segment and a second cavity segment that are interconnected, with the first cavity segment located on the side of the second cavity segment away from the receiving cavity;

[0025] Wherein, along the radial direction of the main body, the cross-section of the first cavity segment is arc-shaped; and / or,

[0026] Along the radial direction of the main body, the second cavity segment has a uniform width structure; and / or,

[0027] The mounting slot is positioned opposite to the second cavity section.

[0028] Furthermore, there are at least two mounting slots, one of which is located at one end of the main body and the other at the other end of the main body; there are at least two diaphragm strips, one of which is used to be disposed within one of the at least two mounting slots and the other within the other of the at least two mounting slots; and / or,

[0029] The width of the diaphragm strip remains constant along the circumferential direction of the mounting groove; and / or,

[0030] Along the radial direction of the main body, the width of the diaphragm band is determined based on the capacitance of the resonant cavity and the frequency separation of the diaphragm band;

[0031] Wherein, according to the formula Calculate the frequency separation degree, where C s =C ∑ -C r C ∑ C is the total capacitance of multiple resonant cavities. r C is the capacitance of the resonant cavity. s For the capacitance of the diaphragm band, The width of the diaphragm strip is given by the radial direction of the main body, and Δω is the π-mode angular frequency and the adjacent... The difference in mode angular frequency, where N is the number of resonant cavities, ω x λ is the π-mode angular frequency. x It is the π-mode resonant wavelength.

[0032] Furthermore, a mounting groove is provided at the end of the main body; and / or,

[0033] The magnetron structure also includes an anode section, which is disposed on the fan blade section and located on the side of the fan blade section facing the receiving cavity; and / or, a mounting groove is spaced apart from the anode section.

[0034] The magnetron structure also includes a cathode section, which is located inside the receiving cavity and spaced apart from the main body section; both ends of the cathode section extend out of the receiving cavity.

[0035] The technical solution of this invention first enhances the mechanical strength of the mounting groove. The alternating arrangement of deep and shallow groove sections not only increases the support points for the diaphragm belt but also optimizes its stress distribution, thereby improving mechanical strength. The deep groove section provides more stable support for the diaphragm belt, while the difference in depth between the deep and shallow groove sections helps adjust the capacitance between the diaphragm belt and the resonant cavity, thus regulating the equivalent impedance of the resonant cavity and achieving better impedance matching. This reduces energy loss and reflection caused by impedance mismatch, improves the electromagnetic conversion efficiency of the magnetron, and optimizes electromagnetic performance, such as frequency stability. Secondly, by alternating shallow and deep groove sections in the mounting groove, the contact area between the diaphragm belt and the fan blades is increased, effectively improving heat dissipation efficiency. When the magnetron is working, the deep groove section can provide a larger surface area, which helps in the rapid conduction and dissipation of heat, thereby reducing the operating temperature of the diaphragm belt and improving its reliability under high-power pulse operating conditions. The alternating distribution of shallow and deep groove sections, as well as the cooperation between the diaphragm belt and the mounting groove, work together to improve the stability of the magnetron structure. This design ensures that even under extreme operating conditions of high power and high frequency, the components of the magnetron maintain good relative position and fit, reducing vibration and displacement and extending service life. Therefore, the technical solution of this invention can solve the technical problem of poor support stability of the structure used to support the diaphragm belt in existing magnetrons. Attached Figure Description

[0036] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0037] Figure 1 A cross-sectional schematic diagram of the main body of a magnetron structure provided according to an embodiment of the present invention is shown;

[0038] Figure 2 A cross-sectional schematic diagram of a magnetron structure provided according to an embodiment of the present invention is shown;

[0039] Figure 3 A cross-sectional view of the main body of a magnetron structure provided according to an embodiment of the present invention is shown from another angle;

[0040] Figure 4 A cross-sectional view of a magnetron structure provided according to an embodiment of the present invention is shown from another angle;

[0041] Figure 5 A schematic diagram of the diaphragm strip of the magnetron structure provided according to an embodiment of the present invention is shown;

[0042] Figure 6A schematic diagram illustrating the working principle of a magnetron structure provided according to an embodiment of the present invention is shown.

[0043] The above figures include the following reference numerals:

[0044] 10. Main body;

[0045] 11. Receiving cavity;

[0046] 12. Fan blade section;

[0047] 13. Resonant cavity;

[0048] 131. First cavity segment; 132. Second cavity segment;

[0049] 14. Mounting slot;

[0050] 141. First end mounting slot; 142. Second end mounting slot;

[0051] 1401, Shallow trench section; 1402, Deep trench section;

[0052] 1411, First mounting slot; 1412, Second mounting slot;

[0053] 20. Diaphragm belt;

[0054] 21. First end diaphragm strip; 22. Second end diaphragm strip;

[0055] 201. First diaphragm belt; 202. Second diaphragm belt;

[0056] 211. First diaphragm segment; 212. Second diaphragm segment;

[0057] 30. Anode section;

[0058] 40. Cathode section; 41. Upper cathode cover; 42. Lower cathode cover;

[0059] 50. Heating section. Detailed Implementation

[0060] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0061] like Figures 1 to 6As shown, an embodiment of the present invention provides a magnetron structure, which includes a main body 10 having a receiving cavity 11; the main body 10 has a plurality of fan blades 12, which are spaced apart around the receiving cavity 11; the gap between two adjacent fan blades 12 forms a resonant cavity 13; the resonant cavity 13 is connected to the receiving cavity 11. The magnetron structure also includes a mounting groove 14 and a diaphragm strip 20. The mounting groove 14 is disposed on the plurality of fan blades 12 and is connected to the resonant cavity 13 to form an annular groove; the diaphragm strip 20 is disposed within the mounting groove 14. The mounting groove 14 includes a shallow groove section 1401 and a deep groove section 1402. Along the extending direction of the receiving cavity 11, the depth of the deep groove section 1402 is greater than the depth of the shallow groove section 1401; there are at least two shallow groove sections 1401 and at least two deep groove sections 1402, which are alternately spaced apart.

[0062] The magnetron structure provided by the embodiments of the present invention first enhances the mechanical strength of the mounting groove 14. The alternating arrangement of deep and shallow groove sections not only increases the support points of the diaphragm strip 20 but also optimizes its stress distribution, thereby improving mechanical strength. The deep groove section 1402 provides more stable support for the diaphragm strip 20, while the difference in depth between the deep groove section 1402 and the shallow groove section 1401 helps to adjust the capacitance between the diaphragm strip 20 and the resonant cavity 13, thereby adjusting the equivalent impedance of the resonant cavity 13 and achieving better impedance matching. This can reduce energy loss and reflection caused by impedance mismatch, improve the electromagnetic conversion efficiency of the magnetron, and optimize electromagnetic performance, such as frequency stability. Secondly, by alternating the shallow groove section 1401 and the deep groove section 1402 in the mounting groove 14, the contact area between the diaphragm strip 20 and the fan blade section 12 is increased, effectively improving heat dissipation efficiency. When the magnetron is operating, the deep groove section 1402 provides a larger surface area, which facilitates rapid heat conduction and dissipation, thereby reducing the operating temperature of the diaphragm belt 20 and improving its reliability under high-power pulse operating conditions. The alternating distribution of the shallow groove section 1401 and the deep groove section 1402, along with the cooperation between the diaphragm belt 20 and the mounting groove 14, work together to improve the stability of the magnetron structure. This design ensures that even under extreme operating conditions of high power and high frequency, the components of the magnetron maintain good relative positions and fit, reducing vibration and displacement and extending service life. Therefore, the magnetron structure provided in this embodiment can solve the technical problem of poor support stability of the structure used to support the diaphragm belt in existing magnetrons.

[0063] Specifically, the magnetron structure is an S-band pulse magnetron.

[0064] Specifically, the diaphragm strip 20 is used to separate the modes of the resonant cavity 13 when electrons and high-frequency fields interact. The diaphragm strip 20 is disposed in the mounting groove 14 formed by the shallow groove section 1401 and the deep groove section 1402, which can more effectively achieve mode separation in the resonant cavity 13, avoid interference between different modes, and thus ensure that the output characteristics of the magnetron, such as power and frequency, are more stable and controllable.

[0065] Specifically, the shallow groove section 1401 is disposed on one of the two adjacent fan blade sections 12, and the deep groove section 1402 is disposed on the other of the two adjacent fan blade sections 12. This structural arrangement makes the contact between the diaphragm belt 20 and the fan blade section 12 more uniform, enhancing the stability of the diaphragm belt 20. The alternating distribution of the shallow groove section 1401 and the deep groove section 1402 optimizes the stress distribution of the diaphragm belt 20 under stress, avoiding stress concentration, thereby effectively improving the mechanical strength of the diaphragm belt 20 and making it more durable under high-power pulse operation conditions.

[0066] In this embodiment, one end of the shallow groove section 1401 is connected to one of the two adjacent resonant cavities 13, and the other end of the shallow groove section 1401 is connected to the other of the two adjacent resonant cavities 13. In this way, the diaphragm strip 20 effectively separates the modes of the resonant cavities 13, which helps to form a more stable electromagnetic mode.

[0067] In this embodiment, one end of the deep groove section 1402 is connected to one of the two adjacent resonant cavities 13, and the other end of the deep groove section 1402 is connected to the other of the two adjacent resonant cavities 13. In this way, the diaphragm strip 20 effectively separates the modes of the resonant cavities 13, which helps to form a more stable electromagnetic mode.

[0068] Specifically, the depth of the deep groove section 1402 is greater than or equal to 2.5 mm and less than or equal to 3 mm. This structural arrangement helps ensure the stable support of the diaphragm belt 20 within the deep groove section 1402, and the selected depth range guarantees sufficient contact area, thereby improving the mechanical strength and heat dissipation efficiency of the diaphragm belt 20. At the same time, limiting the depth range avoids increased manufacturing difficulty and adverse effects on electromagnetic performance caused by excessive depth.

[0069] Specifically, the depth of the deep groove section 1402 is 2.8 mm. This specific depth was determined based on theoretical calculations and simulation analysis, achieving an optimal balance between support and heat dissipation for the diaphragm strip 20. It not only ensures effective support for the diaphragm strip 20 by the deep groove section 1402 but also improves heat dissipation by increasing the contact area, thereby enhancing the stability and reliability of the magnetron under high-power pulse operation conditions.

[0070] Specifically, the depth of the shallow slot section 1401 is greater than or equal to 0.8 mm and less than or equal to 1.3 mm. This structural design depth of the shallow slot section 1401 helps reduce unnecessary capacitance changes between the diaphragm strip 20 and the fan blade section 12, avoiding interference from electromagnetic modes, while ensuring sufficient clearance to guarantee good electromagnetic performance and mode separation. This depth range also takes into account structural strength and heat dissipation requirements.

[0071] Specifically, the depth of the shallow groove section 1401 is 1 mm. This depth is the optimal value obtained based on in-depth research and simulation analysis of the interaction between the diaphragm strip 20 and the resonant cavity 13. This depth can reduce capacitance changes, maintain the stability of the electromagnetic mode, and ensure reliable support of the diaphragm strip 20 within the shallow groove section 1401, avoiding excessive mechanical deformation and improving the performance and reliability of the magnetron at high frequencies.

[0072] Specifically, the width of the deep groove section 1402 or the shallow groove section 1401 is greater than or equal to 1 mm and less than or equal to 2 mm. This structural design ensures good electromagnetic energy transmission within this width range, while optimizing the contact between the diaphragm strip 20 and the fan blade section 12, effectively improving heat dissipation efficiency. The appropriate width selection also considers mechanical strength, avoiding material waste due to excessive width and insufficient support due to excessive narrowness.

[0073] Specifically, the width of the deep slot section 1402 is 1.5 mm, or the width of the shallow slot section 1401 is 1.5 mm. This specific width was determined after considering the electromagnetic performance, mechanical strength, and heat dissipation performance of the diaphragm strip 20. A width of 1.5 mm ensures good electrical contact and mechanical connection between the diaphragm strip 20 and the fan blade section 12, provides sufficient heat dissipation path, and controls capacitance variation through optimized width, thereby improving the overall performance of the magnetron.

[0074] It should be noted that the depth of the deep groove section 1402 is the depth of the deep groove section 1402 along the extension direction of the receiving cavity 11. The depth of the shallow groove section 1401 is the depth of the shallow groove section 1401 along the extension direction of the receiving cavity 11. The width of the deep groove section 1402 is the width of the deep groove section 1402 along the radial direction of the main body 10. The width of the shallow groove section 1401 is the width of the shallow groove section 1401 along the radial direction of the main body 10.

[0075] In this embodiment, there are at least two mounting slots 14, one of which is a first mounting slot 1411 and the other is a second mounting slot 1412. The first mounting slot 1411 is located on the side of the second mounting slot 1412 away from the receiving cavity 11. The shallow groove sections 1401 of the first mounting slot 1411 and the second mounting slot 1412 are staggered. This structural arrangement allows for a more uniform distribution of support and contact points for the diaphragm belt 20 in the different mounting slots 14, avoiding localized stress concentration caused by overlapping grooves. The staggered shallow groove sections 1401 help form a more stable support structure for the diaphragm belt 20, reducing vibration of the diaphragm belt 20 under high-frequency and high-power conditions, thereby improving the frequency stability and output power reliability of the magnetron.

[0076] In this embodiment, there are at least two mounting slots 14, one of which is a first mounting slot 1411 and the other is a second mounting slot 1412. The first mounting slot 1411 is located on the side of the second mounting slot 1412 away from the receiving cavity 11. The deep groove sections 1402 of the first mounting slot 1411 and the second mounting slot 1412 are staggered. This structural arrangement, with its staggered design of the deep groove sections 1402, further enhances the heat dissipation performance and mechanical strength of the diaphragm strip 20. Because the deep groove sections 1402 provide a larger surface area and contact area, the staggered distribution of each deep groove section 1402 ensures uniform heat distribution on the diaphragm strip 20, avoiding localized overheating and reducing thermal stress damage to the diaphragm strip 20. Simultaneously, the staggered design reduces the interference of the deep groove sections 1402 on the electromagnetic mode, ensuring effective transmission of electromagnetic energy and improving the overall performance of the magnetron.

[0077] Specifically, the distance between the first mounting slot 1411 and the second mounting slot 1412 is greater than or equal to 1.8 mm and less than or equal to 2.5 mm. This structural arrangement better balances the electromagnetic and mechanical properties of the diaphragm strip 20. A certain distance reduces interference between electromagnetic modes of the diaphragm strips 20, improving frequency stability; while limiting the distance within a certain range takes into account structural compactness, avoiding excessive spacing that would reduce overall structural efficiency. This helps optimize the internal space of the magnetron, ensuring efficient energy conversion while maintaining structural compactness.

[0078] Specifically, the distance between the first mounting groove 1411 and the second mounting groove 1412 is 2.1 mm. This ensures electromagnetic isolation between the diaphragm strips 20 while maximizing heat dissipation, reducing performance fluctuations caused by temperature changes, maintaining structural strength, preventing deformation or damage under prolonged high-power operation, and ensuring the stability and reliability of the magnetron.

[0079] Specifically, along the circumferential direction of the first mounting groove 1411, the first mounting groove 1411 and the second mounting groove 1412 are equally spaced. This structural arrangement, with its equally spaced distribution, ensures uniform circumferential support for the diaphragm belt 20, preventing material fatigue or fracture caused by excessive local stress. Simultaneously, the uniform distribution also helps to create a stable electromagnetic environment, reducing inter-mode crosstalk and improving the frequency stability and power output consistency of the magnetron.

[0080] Specifically, there are at least two diaphragm strips 20, one of which is a first diaphragm strip 201 and the other is a second diaphragm strip 202. The first diaphragm strip 201 is disposed within the first mounting groove 1411, and the second diaphragm strip 202 is disposed within the second mounting groove 1412. This structural arrangement further enhances the power capacity and frequency stability of the magnetron. The placement of each diaphragm strip 20 within a different mounting groove 14 facilitates more precise control of the electromagnetic mode, achieving more efficient energy conversion. Simultaneously, the use of multiple diaphragm strips 20 can distribute the load, reduce the stress borne by a single diaphragm strip 20, improve the overall structural stability and reliability, thereby extending the service life of the magnetron.

[0081] In this embodiment, the diaphragm strip 20 includes at least two first diaphragm segments 211 and at least two second diaphragm segments 212, which are alternately connected. One side of the first diaphragm segment 211 is flush with one side of the second diaphragm segment 212, and the other side of the first diaphragm segment 211 protrudes beyond the other side of the second diaphragm segment 212. This structural arrangement gives the diaphragm strip 20 an alternating geometry, increasing the surface area and thus improving heat dissipation performance. The protruding structure expands the contact area with the fan blade 12 without adding excessive material and weight, contributing to uniform heat distribution and rapid heat conduction, reducing the temperature of the diaphragm strip 20, and minimizing thermal stress damage. Simultaneously, this geometric change reduces stress concentration, improves the mechanical strength and reliability of the diaphragm strip 20, and extends the service life of the magnetron.

[0082] In this embodiment, the diaphragm strip 20 includes at least two first diaphragm segments 211 and at least two second diaphragm segments 212, which are alternately connected. The first diaphragm segments 211 and the deep groove segment 1402 are in a clearance fit; at least a portion of the second diaphragm segments 212 is in a clearance fit with the shallow groove segment 1401. This structural arrangement and fit further optimize the support and electromagnetic performance of the diaphragm strip 20. The deep groove segment 1402 provides robust mechanical support for the first diaphragm segment 211, enhancing its resistance to deformation and fracture. The clearance fit between the second diaphragm segment 212 and the shallow groove segment 1401 reduces unnecessary capacitance changes, maintains the stability of the electromagnetic mode, and ensures the continuity of the heat dissipation path, thus improving the thermal stability of the diaphragm strip 20. This design also promotes electrical contact between the diaphragm strip 20 and the mounting groove 14, achieving better impedance matching and improving electromagnetic conversion efficiency.

[0083] Specifically, the resonant cavity 13 includes a first cavity segment 131 and a second cavity segment 132 connected to each other, with the first cavity segment 131 located on the side of the second cavity segment 132 away from the receiving cavity 11. The first cavity segment 131 has a circular arc cross-section along the radial direction of the main body 10. This structural arrangement optimizes the electromagnetic field distribution of the resonant cavity 13. The circular arc cross-section helps to form a uniform electromagnetic field, reduces inter-mode coupling and crosstalk, and improves the frequency stability and power output consistency of the magnetron. Furthermore, the circular arc structure can disperse intracavity stress, improve the mechanical strength of the resonant cavity 13, reduce wear and damage during long-term use, thereby ensuring the high reliability of the magnetron.

[0084] Specifically, the resonant cavity 13 includes a first cavity segment 131 and a second cavity segment 132 connected to each other, with the first cavity segment 131 located on the side of the second cavity segment 132 away from the receiving cavity 11. The second cavity segment 132 has a uniform width structure along the radial direction of the main body 10. This structural arrangement ensures stable transmission of electromagnetic waves within the second cavity segment 132, avoiding impedance mismatch caused by width variations. This helps improve the conversion efficiency of electromagnetic energy, reduce energy loss, and increase the output power of the magnetron. Simultaneously, the uniform width structure facilitates the installation and fixation of the diaphragm strip 20, reducing manufacturing difficulty and cost, improving assembly efficiency and consistency, and further ensuring the stability and reliability of the magnetron.

[0085] Specifically, the resonant cavity 13 includes a first cavity segment 131 and a second cavity segment 132 connected to each other, with the first cavity segment 131 located on the side of the second cavity segment 132 away from the receiving cavity 11. A mounting groove 14 is disposed opposite to the second cavity segment 132. Specifically, the mounting groove 14 is disposed on the portion of the fan blade portion 12 used to form the second cavity segment 132. This structural arrangement optimizes the separation and control of electromagnetic modes. The relative arrangement of the mounting groove 14 and the second cavity segment 132 helps the diaphragm strip 20 to form more effective mode separation in the electromagnetic field, avoiding unnecessary leakage of electromagnetic energy between cavity segments and improving frequency selectivity and stability. Furthermore, this arrangement also facilitates a tight fit between the diaphragm strip 20 and the fan blade portion 12, ensuring good mechanical connection and electromagnetic performance, and enhancing the overall structural strength and thermal stability of the magnetron.

[0086] Specifically, there are at least two mounting slots 14, one of which is located at one end of the main body 10 and the other at the other end. There are at least two diaphragm strips 20, one of which is disposed within one of the mounting slots 14 and the other within the other. This structural arrangement, with its double-ended symmetrical design, balances the electromagnetic field distribution inside the magnetron, maintaining a similar electromagnetic environment on both sides of the diaphragm strip 20, thereby improving frequency stability and power output consistency. Simultaneously, the simultaneous operation of the diaphragm strips 20 at both ends disperses electromagnetic forces and mechanical stress, reducing the load on a single diaphragm strip 20, improving the mechanical strength and stability of the diaphragm strip 20 and the entire magnetron, and extending its service life. The double-ended arrangement also facilitates uniform heat distribution, preventing localized overheating and enhancing the magnetron's heat dissipation performance.

[0087] Specifically, at least two mounting slots 14 include a first-end mounting slot 141 and a second-end mounting slot 142. The first-end mounting slot 141 is located at one end of the main body 10, and the second-end mounting slot 142 is located at the other end of the main body 10. At least two diaphragm strips 20 include a first-end diaphragm strip 21 and a second-end diaphragm strip 22. The first-end diaphragm strip 21 is disposed within the first-end mounting slot 141, and the second-end diaphragm strip 22 is disposed within the second-end mounting slot 142.

[0088] Specifically, the width of the diaphragm strip 20 remains constant along the circumferential direction of the mounting groove 14. This structural arrangement ensures the uniformity of the diaphragm strip 20 in the circumferential direction, avoids local electromagnetic field inhomogeneity caused by width variations, thereby reducing crosstalk between modes and improving the frequency stability and power output consistency of the magnetron. Maintaining a constant width also helps preserve the mechanical strength of the diaphragm strip 20, reduces stress concentration, and improves the overall structural reliability.

[0089] Specifically, along the radial direction of the main body 10, the width of the diaphragm strip 20 is determined based on the capacitance of the resonant cavity 13 and the frequency separation of the diaphragm strip 20; wherein, according to the formula... Calculate the frequency separation degree, where C s =C ∑ -C r C ∑ C is the total capacitance of the multiple resonant cavities 13. r C is the capacitance of resonant cavity 13. s The diaphragm has a 20Ω capacitor. The width of the diaphragm strip 20 is the radial direction along the main body 10, and Δω is the π-mode angular frequency and the adjacent... The difference in mode angular frequency, where N is the number of resonant cavities 13, ω x λ is the π-mode angular frequency. x This is the π-mode resonant wavelength. This structural configuration, based on width optimization of electromagnetic parameters, achieves better impedance matching, improves electromagnetic energy conversion efficiency, reduces energy loss, and increases the magnetron's output power. Simultaneously, the optimized design based on frequency separation helps to more accurately control the electromagnetic mode, reduce unnecessary electromagnetic interference, and ensure the stability and reliability of the magnetron in S-band pulse operation mode.

[0090] Specifically, regarding the design of the diaphragm strip 20, the design steps for the diaphragm strip 20 in this embodiment include: Step 1: In-depth analysis of the existing problems with the diaphragm strip 20, clarifying the specific manifestations and influencing factors of poor reliability, stability, and mechanical strength, and determining the direction and focus of improvement. Step 2: Optimizing the dimensions of the diaphragm strip 20 through a combination of theoretical calculation and simulation analysis. Precisely determining its width and thickness, while ensuring power capacity and frequency stability, reasonably adjusting the thickness can enhance its resistance to deformation, and optimizing the length and width can improve stress distribution and increase the mechanical strength of the diaphragm strip 20. Step 3: Innovating the shape design of the diaphragm strip 20. The resonant cavity 13 adopts an alternating annular groove structure to increase the surface area and improve heat dissipation performance, thereby reducing the impact of temperature changes on performance, enhancing stability, and improving mechanical strength. Step 4: Designing a multi-layer structure. Considering the requirements of the equivalent impedance of the resonant cavity 13, the annular grooves are set to be evenly spaced at both ends to achieve better impedance matching and improve the overall performance of the magnetron. Step 5: Conducting rigorous experimental verification. An optimized diaphragm strip 20 sample was fabricated and comprehensively tested in an actual S-band pulsed magnetron to evaluate its performance in terms of power capacity, frequency stability, reliability, and mechanical strength. Based on the experimental results, adjustments and optimizations were made to determine the final design scheme for the diaphragm strip 20.

[0091] Specifically, during the simulation phase, both the diaphragm belt 20 and the main body 10 are made of PEC (chlorinated polyethylene) material.

[0092] Specifically, the mounting groove 14 is provided at the end of the main body 10. With this structural arrangement, the diaphragm strip 20 can more effectively separate the modes of the resonant cavity 13 when electrons and high-frequency fields interact.

[0093] Specifically, the magnetron structure also includes an anode section 30, which is disposed on the fan blade section 12 and located on the side of the fan blade section 12 facing the receiving cavity 11. The mounting groove 14 is spaced apart from the anode section 30.

[0094] Specifically, the magnetron structure also includes a cathode section 40, which is disposed in the receiving cavity 11 and spaced apart from the main body section 10; both ends of the cathode section 40 extend out of the receiving cavity 11.

[0095] Specifically, the magnetron structure further includes an upper cathode cover 41 and a lower cathode cover 42, which are located at opposite ends of the cathode portion 40. The magnetron structure also includes a heating element 50. The heating element 50 is connected to the lower cathode cover 42 and located on the side of the lower cathode cover 42 away from the cathode portion 40. The heating element 50 is used to heat the cathode portion 40.

[0096] Specifically, the heating part 50 is a heating wire.

[0097] like Figure 6 As shown, the working principle of the resonant cavity 13 and the diaphragm strip 20 in the magnetron structure is as follows: The heating section 50 is energized to heat the cathode section 40 to a level sufficient to release electrons. After the cathode section 40 is heated to its operating temperature, electrons begin to escape from its surface. Under the influence of the electric field, the electrons are accelerated and move towards the anode section 30. The electrons undergo cycloidal motion in the interaction region between the cathode section 40 and the anode section 30; that is, the electromagnetic force acting on the electrons causes them to oscillate back and forth along the surface of the anode section 30. The diaphragm strip 20 plays a crucial mode-separating role in the resonant cavity 13. Through its unique alternating annular groove design, it separates different electromagnetic modes, ensuring that the S-band pulse magnetron can stably and efficiently generate the required electromagnetic wave frequency. In the region between the cathode section 40 and the anode section 30, the high-frequency electromagnetic field interacts with the cycloidal electrons, transferring electron energy to the electromagnetic field, thereby generating high-frequency electromagnetic waves. These electromagnetic waves, through the electromagnetic mode conversion of the resonant cavity 13, realize the power output of the magnetron.

[0098] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: the alternating annular groove structure increases the contact area between the resonant cavity support and the diaphragm strip, thereby improving mechanical strength; the optimal diaphragm strip width and thickness are determined, thereby improving power capacity and frequency stability; the design of the double-end double-ring alternating annular groove achieves better electromagnetic performance and mechanical strength.

[0099] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0100] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0101] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0102] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0103] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0104] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A magnetron structure, characterized in that, include: The main body (10) has a receiving cavity (11); the main body (10) has a plurality of fan blades (12), which are spaced apart around the receiving cavity (11); the gap between two adjacent fan blades (12) forms a resonant cavity (13); the resonant cavity (13) is connected to the receiving cavity (11); The mounting groove (14) and the diaphragm strip (20) are provided on the plurality of fan blades (12) and communicate with the resonant cavity (13) to form an annular groove; the diaphragm strip (20) is used to be disposed in the mounting groove (14); The mounting groove (14) includes a shallow groove section (1401) and a deep groove section (1402). Along the extension direction of the receiving cavity (11), the depth of the deep groove section (1402) is greater than the depth of the shallow groove section (1401). There are at least two shallow groove sections (1401) and at least two deep groove sections (1402). The shallow groove sections (1401) and the deep groove sections (1402) are alternately arranged. The diaphragm strip (20) includes at least two first diaphragm segments (211) and at least two second diaphragm segments (212), wherein the first diaphragm segments (211) and the second diaphragm segments (212) are alternately connected; Wherein, one side of the first diaphragm segment (211) is flush with one side of the second diaphragm segment (212), and the other side of the first diaphragm segment (211) protrudes from the other side of the second diaphragm segment (212); The first diaphragm section (211) and the deep groove section (1402) are in clearance fit; at least a portion of the second diaphragm section (212) is in clearance fit with the shallow groove section (1401).

2. The magnetron structure according to claim 1, characterized in that, The shallow groove section (1401) is provided on one of the two adjacent fan blade sections (12), and the deep groove section (1402) is provided on the other of the two adjacent fan blade sections (12); and / or, One end of the shallow groove segment (1401) is connected to one of the two adjacent resonant cavities (13), and the other end of the shallow groove segment (1401) is connected to the other of the two adjacent resonant cavities (13); and / or, One end of the deep groove section (1402) is connected to one of the two adjacent resonant cavities (13), and the other end of the deep groove section (1402) is connected to the other of the two adjacent resonant cavities (13).

3. The magnetron structure according to claim 1, characterized in that, The depth of the deep groove section (1402) is greater than or equal to 2.5 mm and less than or equal to 3 mm; and / or, The depth of the shallow trench section (1401) is greater than or equal to 0.8 mm and less than or equal to 1.3 mm; and / or, The width of the deep groove section (1402) or the shallow groove section (1401) is greater than or equal to 1 mm and less than or equal to 2 mm.

4. The magnetron structure according to claim 1, characterized in that, There are at least two mounting slots (14), one of which is a first mounting slot (1411) and the other is a second mounting slot (1412). The first mounting slot (1411) is located on the side of the second mounting slot (1412) away from the receiving cavity (11). Wherein, the shallow groove section (1401) of the first mounting groove (1411) and the shallow groove section (1401) of the second mounting groove (1412) are staggered; and / or, The deep groove section (1402) of the first mounting groove (1411) and the deep groove section (1402) of the second mounting groove (1412) are misaligned.

5. The magnetron structure according to claim 4, characterized in that, The distance between the first mounting groove (1411) and the second mounting groove (1412) is greater than or equal to 1.8 mm and less than or equal to 2.5 mm; and / or, Along the circumferential direction of the first mounting groove (1411), the first mounting groove (1411) and the second mounting groove (1412) are equally spaced.

6. The magnetron structure according to claim 4, characterized in that, There are at least two diaphragm strips (20), one of which is a first diaphragm strip (201) and the other is a second diaphragm strip (202). The first diaphragm strip (201) is used to be disposed in the first mounting groove (1411), and the second diaphragm strip (202) is used to be disposed in the second mounting groove (1412).

7. The magnetron structure according to claim 1, characterized in that, The resonant cavity (13) includes a first cavity segment (131) and a second cavity segment (132) connected to each other, wherein the first cavity segment (131) is located on the side of the second cavity segment (132) away from the receiving cavity (11); Wherein, along the radial direction of the main body (10), the cross-section of the first cavity segment (131) is arc-shaped; and / or, Along the radial direction of the main body (10), the second cavity segment (132) has a uniform width structure; and / or, The mounting slot (14) is positioned opposite to the second cavity section (132).

8. The magnetron structure according to claim 1, characterized in that, There are at least two mounting slots (14), one of which is located at one end of the main body (10) and the other at the other end of the main body (10); there are at least two diaphragm strips (20), one of which is disposed within one of the at least two mounting slots (14) and the other within the other of the at least two mounting slots (14); and / or, Along the circumferential direction of the mounting groove (14), the width of the diaphragm strip (20) remains unchanged; and / or, Along the radial direction of the main body (10), the width of the diaphragm strip (20) is determined according to the capacitance of the resonant cavity (13) and the frequency separation degree of the diaphragm strip (20); Wherein, according to the formula Calculate the frequency separation degree, where, C ∑ C is the total capacitance of the plurality of resonant cavities (13). r C is the capacitance of the resonant cavity (13). s For the capacitance of the diaphragm strip (20), The width of the diaphragm strip (20) is defined as the radial direction of the main body (10), and Δω is the π-mode angular frequency and the adjacent... The difference in mode angular frequency, where N is the number of resonant cavities (13), ω x λ is the π-mode angular frequency. x It is the π-mode resonant wavelength.

9. The magnetron structure according to claim 1, characterized in that, The mounting groove (14) is provided at the end of the main body (10); and / or, The magnetron structure further includes an anode portion (30), which is disposed on the fan blade portion (12) and located on the side of the fan blade portion (12) facing the receiving cavity (11). The mounting groove (14) is spaced apart from the anode portion (30); and / or, The magnetron structure also includes a cathode section (40), which is disposed in the receiving cavity (11) and spaced apart from the main body section (10); both ends of the cathode section (40) extend out of the receiving cavity (11).

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