135results about "Magnetrons" patented technology

The invention discloses a compact real-time frequency agility relativistic magnetron, and belongs to the technical field of high-power microwave sources. The device comprises an input structure, an end space structure, an anode cavity structure, a full-cavity extraction output structure, a cathode coaxially arranged in an anode and a vacuum tuning mechanism which are sequentially arranged in the axial direction, the vacuum tuning mechanism comprises a tuning sliding block, a tuning rod and a sealing assembly. According to the invention, the vacuum tuning mechanism is designed, and the tuning rod drives the tuning slide block to move, so that the axial lengths of the coupling slot and the fan-shaped waveguide cavity are adjusted, the resonant frequency of the resonant cavity is further changed, and finally, real-time frequency agility of the device in a high vacuum state is realized; in addition, by adopting a reentrant coupling cavity structure and a full-cavity extraction structure, the compactness of the device is realized.

The invention discloses a relativistic magnetron with an adjustable working mode, and belongs to the technical field of high-power microwaves. The relativistic magnetron comprises a cathode assembly, an anode assembly, an output structure assembly and a tuning assembly, the tuning assembly comprises a tunable short circuit surface, a tuning knob and a telescopic rod. On the basis of the inherent structure of the relativistic magnetron, the position of the short circuit surface in the relativistic magnetron is mechanically adjusted, so that the purpose of switching the working mode and the output signal mode in the resonant cavity is achieved, the problem that the working mode of a traditional relativistic magnetron is single is solved, and multi-frequency-point working of the relativistic magnetron is achieved.

A magnetron and microwave heating device, wherein the magnetron includes a tube core (21), a first tube shell (21a), a second tube shell (21b), an output ceramic (22), an antenna cap (23), and an antenna (24), wherein the first tube shell (21a), the tube core (21), the second tube shell (21b), the output ceramic (22), and the antenna cap (23) are connected in sequence, and the antenna (24) enters the tube core (21), passes through the second tube shell (21b) and the output ceramic (22), and enters the antenna cap (23), a height H1 of the second tube shell (21b) relative to the tube core (21) is 14 mm or less, and a ratio of the height H1 of the tube core (21) to the height H2 of the output ceramic (22) is within a range of 0.4 to 2.3.

The invention belongs to the technical field of microwave sources in the high-power microwave technology, and particularly relates to a compact full-cavity extraction relativistic magnetron based on metamaterials. Compared with a traditional full-cavity extraction relativistic magnetron based on a metamaterial resonance structure, the compact full-cavity extraction relativistic magnetron based on the metamaterial resonance structure introduces a microwave transmission region behind an anode, and also introduces a metamaterial structure into the microwave transmission region; through the design, microwaves can be radially coupled and output behind the resonant cavity, so that an excitation system can be directly loaded outside the anode block, the inner diameter size of the excitation system is effectively reduced, the miniaturization advantage of the metamaterial is fully played, and the compactness and the light miniaturization degree of the whole high-power microwave system are further improved.

The invention provides a relativistic magnetron based on side cavity magnetic coupling coaxial TEM mode extraction, which comprises an anode, a cathode and a magnet, and is characterized in that the anode comprises an outer cylinder, a long anode block, a short anode block, an angular coupling slot, a reflection ring, a coaxial waveguide inner conductor and a coaxial waveguide outer conductor; the long anode blocks and the short anode blocks are alternately distributed in the outer cylinder and are aligned at one end of the outer cylinder, and the other end is alternately distributed in a long-short manner; the short anode blocks, the adjacent long anode blocks and the reflection ring form a fan-shaped edge cavity, and the angular coupling slots are arranged on the outer wall of the fan-shaped edge cavity. The coaxial waveguide outer conductor is connected with the outer cylinder, and the inner conductor is connected with the long anode block. When the magnetron works in a pi mode, the high-frequency magnetic fields of the adjacent resonant cavities are coupled to the coaxial waveguide in an in-phase manner through the angular coupling slots, the TEM fundamental mode is excited to perform axial transmission, and full-cavity microwave energy coupling extraction is realized. Microwave energy is extracted in a side cavity magnetic coupling mode, the output power and efficiency are improved, and the structural design is simplified.

The utility model discloses an X wave band magnetron wiring device, which comprises a cathode wiring part, a filament wiring part and an insulating piece, and is characterized in that the cathode wiring part is used for connecting a cathode of an X wave band magnetron and a cathode high-voltage line of a pulse modulation system of an accelerator; therefore, the cathode of the X-band magnetron and the cathode high-voltage line of the pulse modulation system of the accelerator can be conducted. And the filament wiring part is used for connecting a filament of the X-band magnetron and a filament voltage line of a pulse modulation system of the accelerator, so that the filament of the X-band magnetron and the filament voltage line of the pulse modulation system of the accelerator can be conducted. And the cathode wiring part and the filament wiring part are connected into a whole by the insulating part. Compared with the prior art, the wiring device for the X-band magnetron disclosed by the utility model has the advantages that the convenience and the reliability of the wiring work of the cathode and the filament of the X-band magnetron are greatly improved, and the probability that the high-voltage wire falls off and is short-circuited is effectively reduced.

The embodiment of the invention provides a method, a device and a system for compensating anode voltage and output power of a magnetron, and belongs to the technical field of radiators for microwave heating. The method comprises the following steps: acquiring a current temperature and an anode voltage measurement value of a magnetron; calculating a correction voltage according to the current temperature; determining a temperature change rate according to the correction voltage and / or the anode voltage measurement value; performing PID control on the PWM signal of the magnetron according to the temperature change rate and the target voltage value; judging whether the current temperature is within a safe working interval or not; acquiring a current anode voltage value when the current temperature is out of the safe working interval; calculating theoretical output power according to the anode voltage value; calculating a power difference value between the theoretical output power and the actual output power; judging whether the power difference value is greater than or equal to a difference value threshold value; and calculating a target voltage value according to the theoretical output power and the input power under the condition that the difference value is greater than or equal to the difference threshold value.

To provide a magnetron with a higher output. [Solution] The magnetron 1 comprises an anode 10 having a cylindrical anode shell 11 and a plurality of vanes 12 arranged radially on the inner wall of the anode shell 11, a cathode 20 arranged in the center of the anode 10 along the central axis of the anode shell 11, and a pair of pole pieces 31, 32 arranged opposite each other on both end sides of the anode shell 11, and the anode 10 has a plurality of anode segments 10a, 10b.

The invention discloses a relativistic magnetron with an energy feedback structure, and belongs to the technical field of microwaves. The relativistic magnetron is of a full-cavity extraction structure and comprises an anode, a cathode, an energy extraction structure and a guide magnetic field coil. According to the energy extraction structure, an annular microwave reflecting plate is adopted in an output circular waveguide part, part of energy is reflected back to a gap between a cathode and an anode, the interaction between electron cloud and space electromagnetic waves is enhanced, and the output power of a relativistic magnetron is improved. According to the relativistic magnetron, the output power of the relativistic magnetron is effectively improved while the compactness of the device is ensured; meanwhile, the energy feedback structure is simple and easy to process.

The invention relates to the technical field of small magnetron microwave cavities, and discloses a passive hydrogen atom frequency standard small magnetron microwave cavity. The passive hydrogen atom frequency standard small magnetron microwave cavity comprises a cavity cylinder and four pole pieces, a closed microwave resonant cavity is formed in the cavity cylinder, the two sides of the side face of the cavity cylinder are respectively provided with a coupling ring, the two coupling rings are respectively used for inputting and outputting microwave signals, the outer diameter of the cavity cylinder is 111mm, the inner diameter of the cavity cylinder is 105mm, and the height of the cavity cylinder is 188.5 mm; the pole pieces are of an arc-shaped structure, the four pole pieces are annularly arranged in the closed microwave resonant cavity at intervals, a connecting column is arranged on the face, away from the annular center of the multiple pole pieces, of each pole piece in a protruding mode, the connecting columns are connected to the side wall of the cavity cylinder, the inner diameter of a ring defined by the four pole pieces is 61.6 mm, the outer diameter of the ring defined by the four pole pieces is 67.4 mm, the height of the pole pieces is 145 mm, and the distance between every two adjacent pole pieces is 3.8 mm. The mass is light, the size is small, and meanwhile the magnetic field environment requirement of hydrogen atom transition of the passive hydrogen atom frequency standard is met.

The invention relates to an axial tuning relativistic magnetron based on a distributed re-entering cavity structure, which breaks through the frequency band limitation of a traditional tuning mode by introducing the distributed re-entering cavity structure outside a resonant cavity of a single-frequency relativistic magnetron, even in a high-frequency-band device with a relatively shallow resonant cavity depth, the frequency band limitation of the traditional tuning mode is broken through, and the frequency band limitation is reduced. The continuous adjustment of the resonant frequency can still be realized; compared with a traditional axial tuning structure, the magnet does not need to be arranged around the fan-shaped waveguide, the transverse space utilization rate of the system is remarkably improved by optimizing the space layout of the tuning mechanism, and the overall structure is more compact and lighter; based on the characteristic that in-band power efficiency of a relativistic magnetron of the tuning structure provided by the invention is insensitive, relatively high power conversion efficiency is kept in an X wave band.

The invention provides a high-power-density fully-sealed microwave generator. The high-power-density fully-sealed microwave generator comprises a cabinet, a magnetron assembly, a condenser and a first cooling fan, wherein a containing space is formed in the cabinet, and the magnetron assembly, the condenser and the first cooling fan are arranged in the cabinet. The magnetron assembly is electrically connected to a switching interface located in the cabinet, the condenser and the first cooling fan are connected to the cabinet and are arranged on the lateral upper portion of the magnetron assembly, and a water inlet and a water outlet of the condenser are connected to water way interfaces located in the cabinet through pipeline assemblies respectively; the first cooling fan and the condenser are arranged in a spaced mode in the length direction and / or the width direction of the cabinet so as to extract air, cooled by the condenser, in the containing space and blow the air to the magnetron assembly. Therefore, the effect of cooling the magnetron assembly in the sealed cabinet body space is achieved.

The invention discloses a magnetron, which comprises a tube core, a magnet, a plurality of radiating fins and a radiating bracket, and is characterized in that the axis of the tube core extends along a second direction; the magnets are located at two axial ends of the tube core; the plurality of radiating fins are arranged along the axial direction of the tube core, a gap is formed between every two adjacent radiating fins, each radiating fin is provided with a central hole for the tube core to pass through, a notch is formed in the side edge of each radiating fin along the third direction, and the second direction is perpendicular to the third direction; the tube core, the magnet and the plurality of radiating fins are arranged in the radiating support, and the notch is close to the side wall of the radiating support. According to the magnetron provided by the embodiment of the invention, the gaps are formed in the cooling fins, so that the heat exchange amount of the airflow and the tube core can be improved, the tube core can be better cooled, the temperature rise condition of the tube core is relieved, and the temperature rise condition of the magnetron is finally relieved.

The invention belongs to the technical field of microwave sources, and provides a filament current and magnetic field current-based power output method, device and system, the method comprises the execution of a plurality of cycles, and the nth cycle comprises the following steps: obtaining and executing a control strategy, then collecting the real-time power of a magnetron, if the deviation value between the real-time power of the magnetron and the target power is within the set range, all the n periods are completed, otherwise, the n + 1th period is entered, and n is larger than or equal to 1; and after all periods are completed, if the deviation value between the real-time power and the target power is greater than a set value and the duration time exceeds the set time, re-executing the power output method. According to the method, a filament current control strategy, a magnetic field current control strategy and a power control strategy are adopted, the three strategies are in a synergistic effect, and the multiple strategies are organically fused, so that the operation of the magnetron is more stable and adaptive.

The application belongs to the technical field of microwave sources, and provides a power output method, device and system based on filament current and magnetic field current, wherein the method comprises executing a plurality of periods, the nth period comprising the following steps: acquiring and executing a control strategy, then collecting the real-time power of the magnetron, if the deviation value of the real-time power of the magnetron and the target power is within the set range, then all the n periods are completed, otherwise the (n+1)th period is entered, n>=1; after all the periods are completed, if the deviation value of the real-time power and the target power is greater than the set value and the duration exceeds the set time, then the power output method is re-executed. The method of the application adopts a filament current control strategy, a magnetic field current control strategy and a power control strategy, and the three strategies work together, and the organic integration of the multiple strategies makes the operation of the magnetron more stable and adaptive.

Embodiments of the present disclosure relate to a vacuum and high voltage radio frequency system for a medical linear accelerator. A radio frequency system for a radiotherapy machine includes: a first portion including a first gas at a first pressure; a second portion comprising a second gas at a second pressure, the second gas being different from the first gas; and a component between the first portion and the second portion, the component containing a first gas at a first pressure.

The invention discloses an automatic aging process operation line for magnetrons. The automatic aging process operation line comprises a detection workbench, a lead correction table, a feeding table, a tube core aging table, a turnover manipulator, a transfer manipulator, a feeding and discharging manipulator and a discharging conveying line, a rotary positioning jig assembly and a detection assembly are arranged on the detection workbench; the rotary positioning jig assembly comprises a tube core rotary positioning jig and a rotary driving device; the detection assembly comprises a lead detection sensor for detecting a cathode lead of the magnetron; the lead correction table comprises a correction jig and a cathode lead correction assembly. According to the invention, a complete magnetron automatic aging process operation line is designed, the accuracy of the feeding and discharging actions of the magnetron tube cores is ensured after the magnetron tube cores are subjected to cathode lead detection, correction and arrangement in sequence, automatic feeding and discharging and aging process treatment are realized, the processing efficiency of the magnetron tube core aging process steps is improved, and the production cost is reduced. And the comprehensive production cost of enterprises is reduced.

The invention discloses a PVD (Physical Vapor Deposition) magnetron sputtering high metal ionization non-equilibrium magnetron. The non-equilibrium magnetron comprises a magnet yoke and a magnet block, the magnet block is installed on the magnet yoke and comprises an outer ring magnet, an inner ring magnet and a center magnet, a gap is formed between the outer side of the center magnet and the inner side of the outer ring magnet, the inner ring magnet is clamped in the gap between the outer ring magnet and the center magnet, and the outer ring magnet is provided with an N pole and an S pole which are oppositely distributed in the first direction; the center magnet is provided with an N pole and an S pole which are oppositely distributed in the reverse direction of the first direction. The inner ring magnet is provided with an N pole and an S pole which are oppositely distributed in the radial direction, the magnetic pole of the outer side of the inner ring magnet is the same as that of the end, away from the magnet yoke, of the outer ring magnet, and the magnetic pole of the inner side of the inner ring magnet is the same as that of the end, away from the magnet yoke, of the center magnet. According to the invention, the inner ring magnet with specific polarity configuration is arranged between the outer ring magnet and the central magnet, so that the magnetic field intensity of the magnet block on one side away from the magnet yoke is stronger, and the luminance build-up of the plasma is improved.

The application discloses a cathode filament, a cathode assembly, a magnetron and a microwave cooking electric appliance. The cathode filament is used for the magnetron, the cathode filament is in a spiral structure, the cathode filament comprises two non-main emission areas and a main emission area, the two non-main emission areas are connected to two sides opposite to the main emission area along the length direction of the cathode filament, and the pitch of the non-main emission area is greater than the pitch of the main emission area. In the cathode filament, the pitch of the non-main emission area outside the main emission area is greater than the pitch of the main emission area, the stress of the non-main emission area can be more dispersed, the stress of the cathode filament at the non-main emission area can be effectively reduced, and the breaking resistance of the cathode filament after carbonization is improved.

The application discloses an arrayed multi-path frequency-locked magnetron monitoring system, which comprises an arrayed multi-path magnetron, a multi-path coupling mixer capable of receiving signals emitted by the arrayed multi-path magnetron, a multi-path filter-amplifier assembly connected with an output end of the multi-path coupling mixer, a time-division multi-selection switch connected with an output end of the multi-path filter-amplifier assembly, an output end of an AD sampling assembly is connected with a data processing system and a multi-path frequency synthesis source respectively, an output end of the multi-path frequency synthesis source is connected with a mixing frequency input end of the multi-path coupling mixer, and the monitoring system further comprises a reference clock connected with the AD sampling assembly and the multi-path frequency synthesis source. The application adopts multi-path coupling mixing, multi-path switching, AD acquisition and data processing on multi-path signals in time division, obtains multi-path magnetron parameter information in time division, and improves sampling accuracy by adopting multi-path frequency synthesis source feedback, and reduces equipment volume and power consumption.

The application relates to a coaxial relativistic magnetron outputting TEM modes, belonging to the technical field of high-power microwaves, which comprises an anode, a cathode and a magnet, the anode comprises an inner cavity cylinder and an outer cavity cylinder which are coaxially nested, long anode blocks and short anode blocks are alternately arranged on the inner wall of the inner cavity cylinder in the angular direction, the long anode blocks and the short anode blocks are alternately distributed in the axial direction of the inner cavity cylinder to form symmetrical sector edge cavities inside the inner cavity cylinder, an edge cavity angular coupling slot is arranged on the inner cavity cylinder and corresponds to the sector edge cavities, and an inner cavity axial coupling slot is arranged on the inner cavity cylinder and located between the long anode blocks and the short anode blocks, the application has the advantages of simple and compact structure, suitable permanent magnet packaging and low-order mode output, and can realize high-power and high-efficiency microwave output.

The invention relates to a coaxial relativistic magnetron for outputting a TEM mode, and belongs to the technical field of high-power microwaves, the coaxial relativistic magnetron comprises an anode, a cathode and a magnet, the anode comprises an inner cavity cylinder and an outer cavity cylinder which are coaxially nested, and long anode blocks and short anode blocks are alternately arranged on the inner wall of the inner cavity cylinder in the angular direction; the long anode blocks and the short anode blocks are alternately distributed in the axial direction of the inner cavity cylinder in a long-short mode so that symmetrical fan-shaped side cavities can be formed in the inner cavity cylinder, side cavity angular coupling seams are formed in the positions, corresponding to the fan-shaped side cavities, of the inner cavity cylinder, and inner cavity axial coupling seams are formed in the positions, located between the long anode blocks and the short anode blocks, of the inner cavity cylinder. The invention has the advantages of simple and compact structure, suitability for permanent magnet packaging and low-order mode output and the like, and can realize high-power and high-efficiency microwave output.

The invention provides a magnetron with more than three poles, which can improve the full-area etching property of a plane target under the condition that the magnetron does not move relative to the plane target. In addition, the invention also provides PVD (Physical Vapor Deposition) magnetron sputtering equipment with the magnetron. The magnetron with more than three poles is opposite to a back plate of a planar target for physical vapor deposition, at least two annular and closed magnetic poles are included in more than three magnetic poles, and the magnetic poles are sequentially nested in the same plane in a manner of forming a gap in the radial direction.

The present application relates to the technical field of small magnetron microwave cavity, and discloses a passive hydrogen atom frequency standard small magnetron microwave cavity.The passive hydrogen atom frequency standard small magnetron microwave cavity comprises a cavity tube and four pole pieces, a sealed microwave resonant cavity is formed in the cavity tube, one coupling ring is arranged on each side of the side surface of the cavity tube, the two coupling rings are respectively used for input and output of microwave signals, the outer diameter of the cavity tube is 111mm, the inner diameter of the cavity tube is 105mm, and the height is 188.5mm; the pole piece is in an arc structure, four pole pieces are arranged in a ring in the sealed microwave resonant cavity, a connecting column is protrudingly arranged on the side of each pole piece away from the center of the plurality of pole pieces, the connecting column is connected to the side wall of the cavity tube, the annular inner diameter surrounded by the four pole pieces is 61.6mm, the annular outer diameter is 67.4mm, the height of the pole piece is 145mm, and the spacing between each adjacent two pole pieces is 3.8mm.The passive hydrogen atom frequency standard small magnetron microwave cavity is light in mass, small in size, and meets the magnetic field environment requirement of hydrogen atom transition of the passive hydrogen atom frequency standard.

The invention provides a partitioned magnetron and coating equipment, and belongs to the technical field of semiconductor production equipment.The partitioned magnetron comprises a plurality of magnetic poles and an insulation structure, a first spacer region is arranged between every two adjacent magnetic poles, each magnetic pole is equally divided into a plurality of magnetic blocks, and a second spacer region is arranged between every two adjacent magnetic blocks; and the insulating structure is arranged in the first spacer region and the second spacer region. A first interval area is arranged between every two adjacent magnetic poles, the same magnetic pole is also internally divided into the magnetic blocks which are distributed at intervals, the insulating structures are used for performing separation and insulation, so that the magnetic blocks have good insulativity, when the magnetron performs high-speed scanning, due to the fact that the size of a single magnetic block is small, only tiny vortex current can be generated, and the magnetic blocks can be separated and insulated at intervals. The magnetic pole can be effectively prevented from generating high temperature, so that the demagnetization condition is avoided, and the utilization rate of the target material and the uniformity of a corrosion area on the target material can be improved.

The invention discloses a magnetron eccentricity correction machine, which comprises a tube core antenna assembly feeding line, a tube core antenna assembly blanking line, a movable correction table, a loading and unloading comprehensive manipulator and a correction module, the tube core antenna assembly feeding line is arranged on one side of the movable correction table and serves as a feeding side; the tube core antenna assembly blanking line is arranged on the other side of the movable correction table to serve as a blanking side; a jig plate is arranged on the movable correction table in a sliding manner, and a plurality of tube core antenna assembly correction jigs are arranged on the jig plate; and eccentricity correction is carried out on the tube core antenna assembly placed on the tube core antenna assembly correction jig through the correction module. Through reasonable arrangement of the movable correction table, the feeding and discharging comprehensive mechanical arm and the correction module, eccentric correction in the production process of the tube core antenna assembly can be fused into magnetron automatic line production, effective combination with a magnetron assembly material conveying line is achieved, and efficient operation is achieved.

The present application belongs to the field of microwave source technology in vacuum electron devices, and particularly relates to a same-voltage integrated double-frequency output magnetron for microwave oven, which is provided with two magnetrons with different frequencies and sizes, a heat dissipation structure and a magnetic circuit structure, the two magnetrons share one magnetic circuit structure, and the magnetron part and the heat dissipation structure are arranged in the magnetic circuit structure; the heat dissipation structure is provided with three parts of left heat dissipation fins, middle heat dissipation fins and right heat dissipation fins, wherein the left heat dissipation fins are arranged outside one magnetron and extend to the left, the right heat dissipation fins are arranged outside the other magnetron and extend to the right, and the two magnetrons are fixedly connected through the middle heat dissipation fins. In the present application, the same-voltage integrated double-frequency output magnetron is used, the frequencies of the two magnetrons are 2.45 GHz and 5.8 GHz respectively, the frequency difference is large, and the mutual coupling between the two outputs is small; and the double-frequency structure adopts the same voltage and is designed in an integrated manner, so that the structure is simple and suitable for various microwave ovens, and the placement problem of the two magnetrons and the heating uniformity problem are solved.

The magnetron comprises a tube body, an electron source, a magnetic pole group and an anode assembly, a vacuum chamber is arranged in the tube body, the electron source comprises an optical fiber and an electron emission layer, the electron emission layer at least comprises an electron excitation layer, and the electron excitation layer is arranged on a light emitting path of laser emitted by the optical fiber. The electron excitation layer can emit electron beams under the excitation of laser; the electron excitation layer comprises at least one of a zero-dimensional material, a one-dimensional material and a two-dimensional material, the magnetic pole set is annularly arranged on the outer wall of the tube body and used for providing a preset magnetic field located in a plane perpendicular to the axial direction of the optical fiber for electrons emitted by the electron source, and the anode assembly is arranged in the vacuum cavity and is opposite to the light emitting end of the optical fiber at an interval; the anode is provided with a resonant cavity communicated with the vacuum cavity, and a preset electric field is arranged between the anode assembly and the electron emission layer, so that electrons emitted by the electron emission layer can penetrate into the resonant cavity and oscillate under the preset electric field to generate electromagnetic waves.

The application discloses a cathode filament, a cathode assembly, a magnetron and a microwave cooking appliance. The cathode filament has a spiral structure, and a filament material of the cathode filament comprises a filament core and a carbonized layer, the carbonized layer at least wraps the filament core in a circumferential direction of the filament core, a material of the filament core comprises lanthanum tungsten material, and the carbonized layer comprises a lanthanum tungsten carbonized layer. In the cathode filament, the material of the filament core comprises the lanthanum tungsten material, and the carbonized layer comprises the lanthanum tungsten carbonized layer, which reduces the work function of the cathode filament to a certain extent, improves the migration ability of rare earth elements in the cathode filament, and thus the electron emission ability of the cathode filament can be improved to a certain extent, so that the magnetron can adapt to more power requirements of the microwave cooking appliance.

The application provides a relativistic magnetron based on edge-coupled magnetic coupling coaxial TEM mode extraction, which comprises an anode, a cathode and a magnet, wherein the anode comprises an outer cylinder, long anode blocks, short anode blocks, angular coupling slots, a reflecting ring, a coaxial waveguide inner conductor and a coaxial waveguide outer conductor. The long anode blocks and the short anode blocks are alternately distributed inside the outer cylinder, are aligned at one end of the outer cylinder and are alternately distributed in length at the other end; the short anode blocks, the adjacent long anode blocks and the reflecting ring form a fan-shaped edge cavity, and the angular coupling slots are arranged on the outer wall of the fan-shaped edge cavity. The coaxial waveguide outer conductor is connected with the outer cylinder, and the inner conductor is connected with the long anode blocks. When the magnetron works in a pi mode, the high-frequency magnetic field of adjacent resonant cavities is coupled to the coaxial waveguide through the angular coupling slots in phase, the TEM base mode is excited to be axially transmitted, and the full-cavity microwave energy coupling extraction is realized. The microwave energy is extracted through the edge-coupled magnetic coupling mode, the output power and the efficiency are improved, and the structural design is simplified.