74results about "Transit-tube coupling devices" patented technology

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), and then enters the antenna cap (23) sequentially through the second tube shell (21b) and the output ceramic (22), and a height H1 of the second tube shell (21b) relative to the tube core (21) is 14 mm or less, and a ratio H1 / S of the height H1 of the tube core (21) to a cross-sectional area S of the antenna (24) is within a range of 0.4 to 3.3.

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 invention discloses a frequency agility relativistic magnetron based on a dynamic seal axial tuning assembly, and belongs to the technical field of high-power microwave sources. Comprising an anode cylinder, N anode blades, a vacuum chamber shell, a magnetofluid sealing assembly, N / 2 fan-shaped insertion pieces and a tuning assembly, the vacuum chamber shell is coaxially arranged outside the anode cylinder, and an annular vacuum chamber is formed between the vacuum chamber shell and the anode cylinder; an inner sleeve of the magnetofluid sealing assembly is connected with the anode cylinder, and an outer sleeve is connected with the vacuum chamber shell; the tuning assembly is arranged in the vacuum chamber. According to the invention, the axial movement of the tuning assembly is realized through the matching relation of the anode cylinder, the tuning assembly and the vacuum chamber shell, so that the sizes of the coupling slot and the fan-shaped waveguide cavity are changed, and the resonant frequency of the resonant cavity formed by the fan-shaped resonant cavity, the coupling slot and the fan-shaped waveguide cavity is changed; and finally, real-time frequency agility of the device in a high-vacuum state is realized.

The present invention discloses a method and structure for suppressing high-order mode oscillations in a multi-beam klystron. The present invention belongs to the technical field of vacuum electronic devices. The method proposed in the present invention adds a mode filter structure to the inner wall of the coaxial resonator of the multi-beam klystron. Its length is equal to half of the wavelength of the operating mode and is close to three-quarters of the wavelength of the high-order mode. Based on the principle of half-wavelength repeatability, this structure has the characteristic of having little influence on the frequency of the operating mode. Based on the principle of quarter-wavelength impedance transformation, this structure has the characteristic of having a greater influence on the high-order mode. By optimizing the design of the dimensions of the mode filter structure, it is possible to suppress spurious modes and eliminate the influence of high-order mode self-excited oscillations without affecting the frequency, field magnitude, and symmetry of the operating mode of the multi-beam klystron, providing technical support for the simulation design and engineering tube manufacturing of the multi-beam klystron.

To provide a high-frequency transparent window structure capable of suppressing discharge generation.SOLUTION: A high-frequency transparent window structure 12 includes an outer conductor 21, an inner conductor 22 positioned inside the outer conductor 21 and forming a coaxial line 20 that transmits high-frequency waves together with the outer conductor 21, and a high-frequency transparent window 25 fixed between the outer conductor 21 and the inner conductor 22, separating the coaxial line 20 into a vacuum side 23 and an atmospheric side 24. The coaxial line 20 includes a discharge generation portion 26 caused by discharges generated due to high-frequency transmission, and an electrical insulating material 27 is provided covering the discharge generation portion 26.SELECTED DRAWING: Figure 2

This invention provides a power transmission window for a traveling wave tube and its fabrication method, belonging to the field of electronic vacuum device technology. The power transmission window includes an outer conductor, an inner conductor, and a window ceramic. The outer conductor is configured as a coaxial annular composite structure, including a first annular portion and a second annular portion. The second annular portion is brazed within the first annular portion. The first annular portion is made of a molybdenum-copper alloy, and the second annular portion is made of oxygen-free copper. The inner conductor is formed by brazing a power transmission needle and a power transmission needle sealing body. The inner conductor axially penetrates the outer conductor from the power transmission needle side, and the power transmission needle sealing body is a hollow structure. The window ceramic passes through the power transmission needle sealing body and is brazed perpendicularly to it, with the outer circumference of the window ceramic brazed to the inner side of the second annular portion.

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 present invention provides a waveguide energy transmission structure for a traveling wave tube and a traveling wave tube. The waveguide energy transmission structure includes an energy transmission window; a first output waveguide located on one side of the energy transmission window and connected to the traveling wave tube's slow-wave structure; and a second output waveguide located on the other side of the energy transmission window. The inner wall of the first output waveguide is formed with a stepped waveguide transmission structure arranged along the waveguide's transmission direction. The first output waveguide includes a through hole arranged opposite the stepped waveguide transmission structure. The waveguide energy transmission structure also includes an inner conductor. The inner conductor passes through the through hole and is fixedly coupled to the end face of the stepped waveguide transmission structure adjacent to the through hole. The axis of the inner conductor is perpendicular to the waveguide's transmission direction. This waveguide energy transmission structure can reduce the size of the traveling wave tube.

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 embodiment of the invention provides a vacuum electron tube, a radio frequency module and communication equipment, and relates to the technical field of vacuum electron tubes. The vacuum electron tube comprises a metal shell and a sealing cover plate. The sealing cover plate is connected to the metal shell in a covering mode, the sealing cover plate and the metal shell are used for defining a vacuum cavity, and an energy conversion structure is arranged in the vacuum cavity. Wherein the sealing cover plate comprises a dielectric layer structure and a metal layer structure, the metal layer structure forms a signal transmission structure, and the signal transmission structure is coupled with the transduction structure. And the signal transmission structure is used for inputting a radio frequency signal outside the vacuum cavity into the transduction structure, or the signal transmission structure is used for outputting the radio frequency signal processed by the transduction structure from the vacuum cavity. Therefore, the assembly of the vacuum electronic tube can be simpler, and the refinement and consistency of the vacuum electronic tube can be improved.

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.

A radiation support system for radiation therapy includes a waveguide assembly. The waveguide assembly includes a waveguide (4400) extending along a first axis, a mode launcher (4402) extending along a second axis, the second axis being different than the first axis, and a resonant cavity twist (4401) coupling the waveguide to the mode launcher.

Provided are a magnetron and a microwave heating device. 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). 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. The antenna (24) extends into the tube core (21), and sequentially passes through the second tube shell (21b) and the output ceramic (22) and extends into the antenna cap (23). A height H1 of the second tube shell (21b) relative to the tube core (21) is smaller than or equal to 14mm, and a ratio of the height H1 of the tube core (21) to a height H2 of the output ceramic (22) ranges from 0.4 to 2.3.

This suppresses the decrease in the output efficiency of the gyrotron. [Solution] The gyrotron 10 comprises a cavity resonator 16 that interacts with an electron beam 28 to generate electromagnetic waves 30, a collector 26 into which the electron beam 28 that has passed through the cavity resonator 16 is incident, a main body container 40 having an output window 24 located between the cavity resonator 16 and the collector 26, an output mirror 22 (or first mirror) disposed inside the main body container 40 that reflects the electromagnetic waves 30 toward the output window 24, a transmission mirror 20 (or second mirror) disposed inside the main body container 40 that reflects the electromagnetic waves toward the output mirror 22, and a shield 42 disposed inside the main body container 40 that extends cylindrically in the direction of propagation of the electron beam 28 on the outer periphery of a range including the region through which the electron beam 28 passes and the transmission mirror 20, and has the same potential as the transmission mirror 20.

This invention belongs to the field of microwave source technology in vacuum electronic devices, and particularly relates to a coaxial frequency-locked phase-locked structure and a magnetron array system comprising it. The system includes magnetrons equipped with coaxial cables and at least one coaxial energy coupler. The coaxial energy couplers of adjacent magnetrons are connected by coaxial cables between them. The N+1 magnetrons include at least N coaxial cables, and the electrical parameters such as cable length, impedance, and power capacity can be flexibly selected. N>1 can also be any number. This invention introduces efficient frequency-locking and phase-locking between magnetrons, ensuring phase coherence of the output power between the tubes. This allows the use of a large number of magnetrons in an array to overcome the power capacity limitation of a single tube. It also solves the problem of fixed array configuration and inflexibility in existing frequency-locking and phase-locking hard-connection methods, while maintaining the advantages of high-efficiency frequency-locking and phase-locking. The structure offers high flexibility and efficiency, and the overall system is simple.

The invention discloses a broadband coaxial-circular waveguide output structure of a coaxial gyrotron traveling wave tube, and relates to the field of microwave and millimeter wave passive devices. The structure comprises a coaxial outer conductor, a coaxial inner conductor and a supporting structure arranged between the coaxial outer conductor and the coaxial inner conductor, the supporting structure comprises a plurality of supporting units distributed along the circumference, the widths of the supporting units are increased and then reduced along the axial direction, and the middle sections of the adjacent supporting units are quasi-rectangular waveguide cavities; two cavities with the two ends communicated are dug in the coaxial inner conductor, and the coaxial inner conductor, the supporting unit and the coaxial outer conductor are provided with penetrating through holes used for injecting cooling liquid into the cavity and enabling the cooling liquid to flow out of the other cavity. The supporting structure is adopted to solve the supporting problem of the output part of the coaxial gyrotron traveling wave tube, and has the advantages of wide band and high mode conversion efficiency; in addition, through the arrangement of the through hole and the cavity structure, the cooling of the output part of the coaxial gyrotron traveling wave tube is realized.

The present invention discloses a P-band full-cavity extraction relativistic magnetron, which belongs to the field of high-power microwave technology. It includes a vacuum chamber, an anode, an axial extraction structure, and a cathode arranged inside the anode, which are connected in sequence along the axial direction; wherein the anode includes an anode shell, N large fan-shaped anode blades and N small fan-shaped anode blades, and there is a fan-shaped gap between the outer side of the small fan-shaped anode blades and the anode shell; the axial extraction structure includes a mode conversion section and a coaxial output section. The present invention proposes a P-band full-cavity extraction relativistic magnetron, which reduces the guide magnetic field compared to the relativistic backward wave tube; improves the energy conversion efficiency compared to the magnetic isolation line oscillator; and reduces the radial size and improves the compactness of the system compared to the relativistic magnetron with a traditional full-cavity extraction structure. Therefore, the full-cavity extraction relativistic magnetron of the present invention takes into account compactness, low magnetic field, and high efficiency while ensuring fundamental mode output.

This invention provides a magnet array holder and assembly method that accelerate assembly and improve alignment in vacuum electronic devices. [Solution] A magnet array holder 202 is configured to hold magnetic and / or non-magnetic components in order to form a magnet array, wherein the magnet array is configured to operate one or more electron beams within a vacuum electronic device when assembled, and the magnet array holder 202 comprises a set of slots 214 configured to receive magnetic and / or non-magnetic components, a set of pockets 216 for receiving magnetic and / or non-magnetic components, and one or more mounting interfaces configured to connect the magnet array holder 202 to a vacuum electronic device.

A power module comprises a high frequency switching electronic power conditioner including stacked rectifier / filters, the stacked rectifier / filters generating stacked DC output voltages; and a vacuum electronic device coupled to the high frequency switching electronic power conditioner, the vacuum electronic device including components, each component receiving a respective DC output voltage of the stacked DC output voltages.

This document discloses a high-power device for providing a radio frequency electromagnetic field to a waveguide. The device includes a magnetron configured to provide the radio frequency electromagnetic field to the waveguide and a control unit configured to control the magnetron's output of radio frequency energy to the waveguide. The magnetron includes a high-voltage pulse connector enclosed in a housing, a heater connector configured to allow electrical connectors to penetrate the housing, and a mechanism configured to transmit data between the magnetron and the control unit.

The application discloses a relativistic magnetron with an energy feedback structure and belongs to the microwave technical field.The relativistic magnetron is a full-cavity extraction structure and comprises an anode, a cathode, an energy extraction structure and a guide magnetic field coil; wherein the energy extraction structure is provided with a ring-shaped microwave reflection plate in an output circular waveguide part, part of energy is reflected back to a cathode-anode gap, the interaction between an electron cloud and a space electromagnetic wave is enhanced, and the output power of the relativistic magnetron is improved. The application effectively improves the output power of the relativistic magnetron while guaranteeing the compactness of the device; meanwhile, the energy feedback structure is simple and easy to process.

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), and then enters the antenna cap (23) sequentially through the second tube shell (21b) and the output ceramic (22), and a height H1 of the second tube shell (21b) relative to the tube core (21) is 14 mm or less, and a ratio H1 / S of the height H1 of the tube core (21) to a cross-sectional area S of the antenna (24) is within a range of 0.4 to 3.3.

The present invention belongs to the technical field of vacuum electronic devices and specifically discloses a terahertz energy transmission window assembly, comprising an upper window frame and a lower window frame. The upper window frame is provided with an upper rectangular waveguide and an upper circular waveguide, and the lower window frame is provided with a lower rectangular waveguide and a lower circular waveguide. A window piece is provided between the upper window frame and the lower window frame. The lower window frame is provided with a first solder groove, the first solder groove being located at the bottom of the window piece. An upper second solder groove and a lower second solder groove are provided at the contacting ends of the upper and lower window frames, respectively. After the upper and lower window frames are assembled, the upper second solder groove and the lower second solder groove can interlock with each other. Solder rings are placed in the first solder groove and in the second solder groove and / or the lower second solder groove. The upper and lower window frames are welded by melting the solder rings. A test fixture for a terahertz energy transmission window assembly is provided for clamping and fixing a terahertz energy transmission window assembly. The present invention can effectively simplify the welding process and improve welding efficiency and airtightness.

The application discloses a compact real-time frequency-agile 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 arranged in sequence along an axial direction, a cathode coaxially arranged in the anode, and a vacuum tuning mechanism. The vacuum tuning mechanism comprises a tuning slider, a tuning rod and a sealing assembly. The application designs the vacuum tuning mechanism, moves the tuning slider through the tuning rod, adjusts the axial length of the coupling slit and the sector waveguide cavity, changes the resonant frequency of the resonant cavity, and finally realizes real-time frequency-agile of the device in a high-vacuum state. In addition, the compactness of the device is realized by adopting a reentrant coupling cavity structure and a full-cavity extraction structure.

The present invention discloses an adapter device for a traveling wave tube coaxial energy transmission window, comprising: a radio frequency coaxial cable and an adapter and a standard radio frequency coaxial connector respectively connected to both ends of the radio frequency coaxial cable, the adapter comprising an inner conductor and an outer conductor respectively connected to the radio frequency coaxial cable, and a nut rotatably sleeved on the outer conductor, the inner conductor being in the shape of a circular tube, and the nut being used for threaded connection with the coaxial energy transmission window of the traveling wave tube. The inner conductor of the adapter of the adapter device of the present invention is a female interface (hole) that can be directly plugged into the inner conductor (pin) of the coaxial energy transmission window, and the outer conductor of the adapter is provided with a rotatable nut that can be connected to a bolt on the outer conductor of the coaxial energy transmission window. Since the nut is located at the end of the slender radio frequency coaxial cable, the operating space for tightening the nut is no longer restricted, so that it can be easily and conveniently connected to the inner and outer conductors of the coaxial energy transmission window.

An embodiment of the present invention discloses an energy transmission window and a traveling wave tube including the energy transmission window. The energy transmission window includes a window frame having a vacuum cavity; the window frame includes a window sealing platform surrounding the vacuum cavity for encapsulating a window sheet, a boss surrounding the outside of the window sealing platform and extending in the axial direction of the window frame, and an encapsulation fixing platform surrounding the outside of the boss for encapsulating the window frame; the window sealing platform, the boss, and the encapsulation fixing platform are arranged at intervals. The present invention provides a boss between the window sealing platform and the encapsulation fixing platform, utilizing the plastic deformation generated by the boss to significantly reduce the stress at the sealing interface between the window sheet and the window frame. As a result, oxygen-free copper can be used as the window frame material in conjunction with a diamond window sheet, thereby reducing the transmission loss of the energy transmission window in the terahertz band and increasing the output power of the traveling wave tube.

The invention belongs to the technical field of terahertz electromagnetic wave sources, and discloses a terahertz traveling wave feedback oscillator based on an external feedback circuit, which comprises a traveling wave tube with an input port and an output port, an external feedback loop is arranged between the input port and the output port of the traveling wave tube and is used for forming a signal feedback path; the external feedback loop comprises a directional coupler, an adjustable attenuator, an adjustable phase shifter and a filter which are connected in sequence, and the resonance characteristic of the filter can be adjusted; the input end of the directional coupler is connected with the output port of the traveling wave tube, the straight-through end of the directional coupler is used as the power output end of the oscillator, and the coupling end of the directional coupler is connected with the input end of the adjustable attenuator; the problems that in the prior art, an inner feedback structure of a traveling wave tube feedback oscillator easily causes port mismatch and bandwidth compression, and an outer feedback system lacks an independent regulation and control mechanism due to multi-parameter coupling, so that the frequency spectrum purity, the tuning freedom degree and the output stability are difficult to consider at the same time are effectively solved.

The invention discloses a gyrotron traveling wave tube interaction system with double-loss material composite loading and a design method. According to the invention, the sheet-shaped mode selection attenuation waveguide is periodically loaded in the nonlinear mode selection waveguide, so that self-oscillation of a main competition mode is suppressed; under the condition that the total length of the non-linear mode selection waveguide is not changed, the introduction of the sheet-shaped mode selection attenuation waveguide can improve the threshold value of the oscillation starting current of a main competition mode, so that the stable work of higher working current is realized, and the high-power stable output of the gyrotron traveling wave tube is realized; under the condition that the working current is not changed, the mode selection attenuation waveguide realizes stable work under the condition that the nonlinear mode selection waveguide is arranged, and the beam-wave interaction efficiency and gain of the gyrotron traveling wave tube are improved; the method is low in sensitivity to loss material parameters, and has application potential in the aspect of engineering implementation of the gyrotron traveling wave tube with high average power; the method is simple and easy for engineering realization, and shows excellent performance in the development of gyrotron traveling wave tubes.

The invention relates to a compact radial high-power microwave generator, and belongs to the technical field of high-power microwaves. The device is composed of a cathode 1, a first drift section 2, a coupling cavity 3, a second drift section 4, a radial slow wave structure 5, an electron beam collector 6, a radial coupling channel 7, a mode converter 8 and an output waveguide 9. The invention relates to a compact radial high-power microwave generator which is of a circumferential symmetrical structure, mainly utilizes interaction between a high-current relativistic electron beam radially emitted by a cathode 1 and a transverse electric mode in a radial slow wave structure 5, and outputs microwaves through outward coupling of a coupling cavity 3 near the cathode side. Therefore, the purposes of reducing the axial size of the radial high-power microwave generator and realizing hollow waveguide single-mode output are achieved.

The application discloses a K-band transit-time oscillator based on a last pre-cavity extraction structure, which comprises an inner cylinder and an anode outer cylinder sleeved outside the inner cylinder, a circular annular cavity is formed between the inner cylinder and the anode outer cylinder, the cavity comprises a first drift tube, a first modulation cavity, a second drift tube, a second modulation cavity, a third drift tube, an extraction cavity and a first coaxial output waveguide which are sequentially communicated, the output end of the anode outer cylinder is further provided with a circular annular second coaxial output waveguide, the first coaxial output waveguide and the second coaxial output waveguide are coaxially arranged, the second modulation cavity is further communicated with the second coaxial output waveguide, and the K-band transit-time oscillator is rotationally symmetrical about the central axis of the inner cylinder. The application verifies the feasibility of extracting microwave by the last pre-cavity, and realizes higher efficient output and higher power output.