32results about "Transit-tube coupling devices" patented technology

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.

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.

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.

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 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.

The invention discloses a pre-cavity electron beam channel structure for suppressing parasitic oscillation of a high-power gyrotron. The structure comprises a cathode end electron beam channel cylinder and a resonant cavity end electron beam channel cylinder which are communicated with each other, the cathode end electron beam channel cylinder comprises a cathode end outer cylinder and a cathode end inner cylinder which are sleeved and fixed together, and a first channel in a conical cylinder shape is formed in the cathode end outer cylinder; the resonant cavity end electron beam channel cylinder comprises a resonant cavity end outer cylinder and a resonant cavity end inner cylinder which are sleeved and fixed together, a second channel of a kidney-shaped cylindrical structure is formed in the resonant cavity end inner cylinder, the inner diameter of the second channel is gradually reduced from the two ends to the middle, and the interior of the resonant cavity end inner cylinder is further concaved inwards to form a plurality of inner holes which are not symmetric about the central axis. When the structure is used, the problems that in the prior art, a gyrotron parasitic oscillation suppression mode is complex in machining and high in cost, and parasitic oscillation of a low-frequency band cannot be effectively suppressed are solved.

An electron tube (100) is provided including: a cathode (3) that emits thermoelectrons; an anode including a plurality of anode pieces (4) arranged, so as to surround the cathode (3), in an anode cyli

The utility model discloses a microwave window, which relates to the technical field of microwave vacuum devices and comprises an oxygen-free copper waveguide and a ceramic window sheet welded on the inner side of the oxygen-free copper waveguide, an outer annular reserved groove is arranged on the outer side of the oxygen-free copper waveguide, and an inner annular reserved groove is arranged on the inner side of the oxygen-free copper waveguide. The outer annular preformed groove is located on the outer side of the position, where the inner annular preformed groove is formed, of the oxygen-free copper waveguide, the inner side of the outer annular preformed groove is fixedly connected with a first reinforcing ring in a sleeving mode, and the outer side of the oxygen-free copper waveguide is fixedly connected with a second reinforcing ring covering the outer annular preformed groove in a sleeving mode. In addition, the second reinforcing ring is matched with the first reinforcing ring, so that the expansion amount of the oxygen-free copper waveguide can be further reduced, a gap between the ceramic window piece and the oxygen-free copper waveguide at a high temperature is reduced, the brazing quality is improved, and then it is guaranteed that the energy transmission window does not leak air under two or more barometric pressures.

A power module includes a high frequency switching electronic power regulator including a stacked rectifier / filter, the stacked rectifier / filter generating a stacked DC output voltage; and vacuum electronics coupled to the high frequency switching electronic power regulator, the vacuum electronics including components, each component receiving a respective one of the stacked DC output voltages.

According to one embodiment, an high-frequency input coupler installed between a waveguide and an acceleration cavity to input high-frequency waves from the waveguide to the acceleration cavity, a coaxial waveguide conversion unit includes a high-frequency transmission window structure connection unit that connects the high-frequency transmission window structure and an inner conductor connection unit that connects an inner conductor which includes an inner conductor support on a side of the inner conductor connection unit, and the high-frequency input coupler includes an electrically connectable and deformable buffer between the inner conductor support and the inner conductor connection unit.

Embodiments of the present application relate to the technical field of vacuum tubes, and provide a vacuum tube, a radio frequency module, and a communication device. The vacuum tube comprises a metal housing and a cover plate. The cover plate covers the metal housing, the cover plate and the metal housing define a vacuum cavity, and a transduction structure is provided in the vacuum cavity. The cover plate comprises a dielectric layer structure and a metal layer structure, the metal layer structure is provided with a signal transmission structure, and the signal transmission structure is coupled to the transduction structure. 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. In this way, it is easy to assemble the vacuum tube, which is beneficial to improving the accuracy and consistency of the vacuum tube.

The utility model relates to the technical field of microwave equipment, in particular to an exhaust pipe for a magnetron output device, which comprises an exhaust pipe, a fixing device is movably connected inside the exhaust pipe, a sealing cover is arranged on the outer side of the fixing device, and a support column is fixedly connected between the exhaust pipe and the fixing device. By arranging the fixing device, the sealing covers with different inner diameters caused by production precision can be fixed to the exhaust pipe, the stud is rotated by screwing the screwing block, and the movable block can move back and forth in the sliding groove through forward rotation and reverse rotation of the stud, so that the sealing covers are fixed to the exhaust pipe, and the sealing covers are fixed to the exhaust pipe. A fixed column can move back and forth through movement of a movable block, so that the fixed column can move towards the inner side of the sealing cover, the fixed column can be tightly attached to the inner side of the sealing cover, and it is guaranteed that a plurality of fixed rings can be tightly clamped into clamping grooves to fix the sealing cover; and the sealing covers with different sealing cover inner diameters due to production precision can be conveniently fixed.

A linear accelerator having multiple cavities along a beamline that is powered by a pair of distribution waveguide manifolds with a sequence of feed arms connecting the manifolds to the cell sections and a single RF feed is described herein. The distribution waveguide manifolds are connected to the cell sections so that alternating pairs of cell sections are connected to opposite distribution waveguide manifolds. The individual cavities are individually optimized according to the electron speed along the beamline. The geometry of the cell junctions and connecting channels between the manifolds and cavities can be individually optimized along the beamline as well and can include a serpentine configuration to provide a consistent RF channel length between the manifolds and differing cavities. Methods of designing the linear accelerator and fabricating the accelerator are also provided.

The present invention relates to an extended interaction klystron high frequency circuit. The high frequency circuit comprises an electron beam channel and a plurality of resonant cavities, the electron beam channel comprising a first electron beam channel and a second electron beam channel, the plurality of resonant cavities comprising an input resonant cavity, a plurality of intermediate resonant cavities and an output resonant cavity, each resonant cavity comprising a first coupling cavity and a second coupling cavity symmetrically arranged with respect to the first and second electron beam channels, and a plurality of gap cavities respectively interconnecting the first and second electron beam channels and the first and second coupling cavities, the positions and radii of the electron beam channels being such that the resonant cavities operate in TM 21 mode. The extended interaction klystron high frequency circuit operating in anti-symmetric mode according to the present invention allows to realize a single mode high power terahertz klystron operating stably.

A coaxial window inner conductor cooling structure provided by the present invention comprises a coaxial window, the coaxial window comprises an annular window sheet, an outer conductor sealed on the outer peripheral surface of the window sheet and an inner conductor sealed on the inner peripheral surface of the window sheet, and the inner conductor comprises an inner cavity; the output waveguide is vertically communicated with the coaxial window; the waveguide coaxial conversion structure is connected with the inner conductor and the output waveguide; the waveguide coaxial conversion structure comprises a channel communicated with the inner cavity; the liquid cooling assembly comprises a matching piece arranged on the outer side of the output waveguide and a hollow liquid cooling pipe extending into the inner cavity in the axial direction of the coaxial window; the matching piece is provided with a liquid inlet and a liquid outlet; the output waveguide is provided with a communicating hole; one end of the liquid cooling pipe extends into the inner cavity and is provided with a liquid outlet hole communicated with the inner cavity, and the other end of the liquid cooling pipe penetrates through the channel and the communication hole and then extends into the matching piece to be communicated with the liquid inlet, so that the interior of the liquid cooling pipe, the inner cavity and the channel jointly form a cooling circulation path.

The invention discloses an axial energy extraction structure of a broadband super-radiation backward wave tube, and belongs to the field of high-power microwave sources. The energy extraction structure comprises a coaxial TM0n-TEM mixed mode converter, a mixed mode phase shifter and a supporting rod loading coaxial waveguide which are connected in sequence. When a TM01 wave enters the coaxial TM0n-TEM mixed mode converter, part of a TM01 mode is converted into a TEM mode, and the TM01 mode and the TEM mode are equal in amplitude and phase. In the hybrid mode phase shifter, waves of two modes can generate a phase difference, and equal-amplitude phase reversal of a TM01 mode and a TEM mode is achieved. When the supporting rod loads the coaxial waveguide, the TM01 mode and the TEM mode interfere with each other and are transmitted in the TE11 mode, and after passing through the area where the supporting rod is located, the electromagnetic waves are converted into the TM01 and TEM mixed mode again to be output. The axial energy extraction structure has the advantages of being simple in supporting structure, large in power capacity and high in energy extraction efficiency.

The application discloses a kind of high-power coaxial energy transmission windows and its assembling method in the field of microwave electric vacuum device, high-power coaxial energy transmission window includes coaxially arranged window porcelain welding piece, outer conductor, inner conductor, inner conductor sleeve and window ceramic;Window porcelain welding piece is set to the inner side of the upper portion of outer conductor, and is sealed and welded with outer conductor;Window ceramic is sealed and welded in the inner side of window porcelain welding piece, and inner conductor penetrates window ceramic and is sealed and welded with window ceramic;Inner conductor sleeve is set below window ceramic and is set to the outside of inner conductor, and there are gaps between inner conductor sleeve and inner conductor and window ceramic.The coaxial energy transmission window reduces the heat transmitted to window ceramic, reduces the risk of ceramic burst, so as to ensure that coaxial energy transmission window can work stably in high-power microwave device.

The invention provides a high-frequency system for a third harmonic klystron and a design method. The high-frequency system comprises an electron beam channel for transmitting electron beams and a resonant cavity communicated with the electron beam channel. The resonant cavity is configured to work in a hybrid mode of a fundamental mode and a target high-order mode, so that when the electron beam moves in the electron beam channel and passes through the resonant cavity, the electron beam can interact with high-frequency electric fields of the fundamental mode and the target high-order mode at the same time; the range of the proportion of the resonant frequency of the target high-order mode to the resonant frequency of the fundamental mode is 2.9-3.1. Through the high-frequency system, the problems of insufficient harmonic current and low efficiency caused by the fact that a traditional harmonic klystron only extracts harmonic energy from an output cavity are fundamentally solved.

The utility model relates to a relativistic magnetron for full-cavity extraction and radial output, which belongs to the technical field of high-power microwaves and comprises an anode, a cathode and a magnet, the anode comprises an anode block and an anode shell, a fan-shaped waveguide and a rectangular waveguide are arranged on the periphery of the anode shell, and the rectangular waveguide is arranged along the radial direction of the anode shell. The fan-shaped waveguide is provided with two short-circuit surfaces along the axial direction of the anode shell, one end part of the rectangular waveguide is connected with one short-circuit surface of the fan-shaped waveguide, and the technical problems in the prior art that the periodic symmetry of an interaction region is poor, the inner diameter of the magnet is larger, and the light and small size cannot be realized can be solved.

The application discloses a mixed material input cavity for a pulse magnetic field klystron and an optimization method thereof. The mixed material input cavity comprises an inner conductor, a first outer conductor and a second outer conductor which are sleeved on the inner conductor. A drift tube cavity is formed between the outer wall of the inner conductor and the inner walls of the first outer conductor and the second outer conductor. An injection waveguide is formed between the first outer conductor and the second outer conductor. The injection waveguide and the drift tube cavity are communicated through an input cavity. The input cavity inner wall parts of the inner conductor, the first outer conductor and the second outer conductor are made of metal materials with different electric conductivities. The optimization method comprises optimizing the structure of the mixed material input cavity so that the response time of the metal materials with different electric conductivities to a magnetic field is as consistent as possible. The mixed material input cavity for the pulse magnetic field klystron aims to reduce microwave loss of injected microwaves and reduce eddy current loss.

A magnetron and a microwave heating device. The magnetron comprises a tube core (21), a first tube housing (21a), a second tube housing (21b), output ceramic (22), an antenna cap (23), and an antenna (24). The first tube housing (21a), the tube core (21), the second tube housing (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 housing (21b) and the output ceramic (22) and then extends into the antenna cap (23). The height H1 of the second tube housing (21b) relative to the tube core (21) is not greater than 14 millimeters, and the ratio H1 / S of the height H1 of the tube core (21) to the cross-sectional area S of the antenna (24) is within the range of 0.4 to 3.3.

The application discloses a 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 support structure arranged between the coaxial outer conductor and the coaxial inner conductor. The support structure comprises a plurality of circumferentially distributed support units. The width of the support units increases first and then decreases along the axial direction. The middle sections of adjacent support units are rectangular waveguide cavities. The coaxial inner conductor is provided with two cavities which are connected at two ends. The coaxial inner conductor, the support units and the coaxial outer conductor are provided with through holes which are used for injecting cooling liquid into one cavity and making the cooling liquid flow out of the other cavity. The application solves the support problem of the output part of the coaxial gyrotron traveling wave tube by using the support structure, and has the advantages of wide band and high mode conversion efficiency. In addition, the through holes and the cavity structure are arranged to realize the cooling of the output part of the coaxial gyrotron traveling wave tube.

This application provides an electron gun and a vacuum electronic device. An anode of the electron gun and a signal input system are integrated together, so that an integrated design and processing and manufacturing of the electron gun and the signal input system can be implemented. In addition, in this application, a length of a circuit in which energy exchange occurs between an electron beam and a high-frequency circuit can be reduced, and energy exchange efficiency between the electron beam and the high-frequency circuit can be improved. The electron gun includes a cathode, a focus electrode, and an energy exchange module. The energy exchange module includes an anode port, a signal input port, and an energy exchange unit. An input signal is input from the signal input port into the energy exchange unit, and an electron beam is transmitted from the anode port to the energy exchange unit to perform energy exchange with the input signal. The electron beam is generated by the cathode, the focus electrode, and the anode port.

This invention belongs to the field of microwave vacuum electronic devices, specifically providing a trapezoidal subwavelength aperture high-frequency structure for an extended interaction klystron, used to improve the power and gain of the extended interaction klystron and expand its bandwidth. This invention creatively proposes an isosceles trapezoidal subwavelength aperture with a base length proportional to the width of the resonant cavity, thereby designing the input cavity, intermediate cavity, and output cavity. This increases the beam-wave interaction area and characteristic impedance of the intermediate cavity, improving the interaction efficiency while maintaining a low quality factor and avoiding parasitic oscillations. It also increases the characteristic impedance of the input and output cavities, enhancing beam-wave interaction and reducing the input reflection coefficient S. 11 With a relatively large value and a -5dB bandwidth greater than 1GHz, the power feed and bandwidth extension capabilities are further enhanced. Compared with the traditional trapezoidal structure, the extended interaction klystron of this invention has significant advantages in terms of high power, high gain, and wide bandwidth.