22results about "Klystrons" patented technology

The application discloses a K-band transit-time oscillator based on two-stage modulation and distributed extraction, 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, a circular annular second coaxial output waveguide is further arranged at an output end of the inner cylinder, the first coaxial output waveguide and the second coaxial output waveguide are coaxially arranged, the extraction cavity is further communicated with the second coaxial output waveguide, and the K-band transit-time oscillator is rotationally symmetrical about a central axis of the inner cylinder. The two-stage modulation structure is adopted to increase the depth of fundamental wave current modulation, so that the output efficiency is improved, and the double-side channel distributed extraction mode is adopted to improve the output power, so that the problem that the output power is limited while high efficiency output is realized at a high frequency band is overcome.

The invention provides a method, a device and equipment for realizing miniaturization of an electronic optical system of a klystron, which can be applied to the technical field of vacuum electronic devices. The method for realizing miniaturization of the electron optical system of the klystron comprises the following steps: acquiring a first target parameter of an electron gun and an initial permanent magnet focusing system; according to the first magnetic induction intensity, the magnetic induction intensity area range of the initial permanent magnet focusing system is adjusted, and a first magnetic induction intensity curve is obtained; adjusting the initial structure parameters by simulating a working state of embedding an electron gun corresponding to the initial structure parameters into the middle permanent magnet focusing system to obtain a second magnetic induction intensity curve; and embedding the electron gun corresponding to the target structure parameter corresponding to the second magnetic induction intensity curve into the target permanent magnet focusing system to obtain the electron optical system of the target speed regulation tube.

The present application relates to an electron gun, which has a cathode having an electron emission surface, a planar shape of which is circular, and which emits electrons, a heater which warms the cathode, and an anode which applies a positive potential to the cathode and extracts the electrons in a certain direction. The cathode has a through-hole along a central axis of the cathode in a central portion thereof, and at least one of an opening edge portion of the through-hole on the electron emission surface side and an inner surface of the through-hole has a non-emission layer, or the opening edge portion of the through-hole on the electron emission surface side is a chamfered C face or a chamfered R face.

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 present invention relates to a multi-gap resonator and a method for designing the same. The resonator of the present invention comprises an electron beam channel, a first coupling cavity and a second coupling cavity symmetrically arranged with respect to the electron beam channel, and a plurality of gap cavities respectively communicating with the electron beam channel and the first and second coupling cavities, and at least one electric wall respectively arranged in the first and second coupling cavities, which electric wall causes at least one non-working mode of the resonator to be cut off. The method for designing the multi-gap resonator according to the present invention can reduce the non-working resonant modes and increase the mode separation; and due to the increased mode separation, it is possible to use more gap cavities to improve the characteristic impedance of the interaction mode. Thus, a multi-gap resonator with significantly improved characteristic impedance can be obtained.

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 invention provides an open type absorption cavity for a TM220 higher-order mode klystron and a preparation method and application of the open type absorption cavity. The open type absorption cavity is arranged in a magnetic field distribution area of a TM120 mode and a TM210 mode in an output cavity of a high-order mode klystron, and comprises a frame structure and an attenuation material body filled in the frame structure, the frame structure comprises an upper base, a lower base and a plurality of connecting pieces, the upper base and the lower base are arranged in parallel, the connecting pieces are vertically connected between a plurality of pairs of aligned corners of the upper base and the lower base respectively, a cavity structure with an open side face is defined by the upper base, the lower base and the connecting pieces, and the cavity structure is filled with the attenuation material body; the outer side faces of the attenuation material body and the peripheral face of the connecting piece are arranged in a coplanar mode, the open state of the four outer side faces of the attenuation material body is kept through the frame structure, the open outer side faces make direct contact with and are coupled with a magnetic field generated in an output cavity of the high-order mode klystron, and suppression and absorption of a TM120 mode and a TM210 mode 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 application discloses a radial electron beam staggered grid structure traveling wave amplifier, which comprises coaxial staggered grid leaves with different radii and made of metal at the lower side and the upper side of upper and lower metal ring shells, the lower side and the upper side of the grid leaves are staggered, and a cavity is formed between the lower side and the upper side of the grid leaves, thereby forming a slow wave structure. Electromagnetic waves are injected from the cavity between two adjacent grid leaves at the lower side of the upper metal ring shell or the upper side of the lower metal ring shell near a hot cathode through an input structure as a signal to be amplified, the electromagnetic waves are transmitted along the cavity in the coaxial staggered grid and interact with electron beams transmitted along the radial direction, thereby converting electron kinetic energy into electromagnetic wave energy, amplifying the input electromagnetic wave signal, and outputting the amplified electromagnetic waves from the lower metal ring shell or the upper metal ring shell through an output structure. The application has the characteristics of high interaction efficiency, high output power, high coupling impedance and simple structure.

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.

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.

This invention discloses a method for realizing a high-efficiency compact klystron based on a hybrid-mode resonator. The method includes: using the clustered center stabilization method (CSM), employing three combinations of hybrid-mode resonators, and optimizing the klystron's performance using large-signal computer software. This method reduces the required number of resonators to five when introducing one higher harmonic cavity or six when introducing two higher harmonic cavities. The three combinations of hybrid-mode resonators include the fundamental frequency f operating in TM mode. 010 Mode, second harmonic 2f operating in TM 020 Coaxial resonant cavity of mode; fundamental frequency f operates in TM 010 Mode, third harmonic 3f operating in TM 030 Coaxial resonant cavity in TM mode; second harmonic 2f operates in TM mode. 020 Mode, third harmonic 3f operating in TM 030 A coaxial resonant cavity in a specific mode. This invention is highly advantageous for reducing the weight and length of beam-wave interaction.

This invention discloses an arrayed oscillator based on a klystron for high-gain frequency-locked phase-locking, belonging to the field of vacuum electronic device technology. The arrayed oscillator includes at least two extended interaction oscillators and one extended interaction klystron. The extended interaction klystron includes an input cavity, at least one intermediate cavity, and an output cavity connected in sequence. The output cavities of the extended interaction oscillators and the klystron are arranged in a linear array or ring with equal spacing. The gaps or coupling cavities of adjacent components are connected by coupling bridges, realizing the arrayed interconnection of each component. This invention combines the advantages of high gain, controllable frequency and phase of the klystron with the advantages of high power, high efficiency, and simple structure of the arrayed extended interaction oscillator, achieving frequency-locked phase-locking of the arrayed oscillator. It is applicable to single-beam and multi-beam oscillators across the entire frequency band, capable of achieving output power at the MW or even GW level, and has significant engineering significance and practical value.

This invention belongs to the field of vacuum electronic devices, specifically relating to an electron gun design method for a circular single-electron-beam G-band extended interaction klystron. The invention introduces an n (2≤n≤10) periodic structure on the electron gun focusing electrode surface to regulate the electrostatic field distribution, thereby increasing the total emission current of the electron gun cathode and enhancing the electron beam power. This method employs a circular single electron beam, ensuring simple design and fabrication of the magnetic focusing system and stable electron beam transmission. The electron gun focusing electrode uses an n-periodic corrugated control structure, guaranteeing that under G-band conditions and high electron beam voltage, the cathode emission current density is less than 12 A / (cm^2), the total cathode emission current is approximately 0.334 A, and its static flux density is 100%. This invention solves the problems of stable and efficient high-energy electron beam focusing and transmission in existing G-band extended interaction klystrons, while also considering the simplicity of electron gun fabrication and assembly, long cathode life, and a simple magnetic focusing system.

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 invention provides a broadband output circuit for a W-band klystron and a bandwidth optimization method. The broadband output circuit comprises an output resonant cavity, an output waveguide and a filter arranged between the output resonant cavity and the output waveguide. The filter comprises at least one cylindrical waveguide section; the cylindrical waveguide section is used for expanding the output bandwidth of the W-band klystron. Through the output circuit, the W-band klystron can realize obvious bandwidth expansion.

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.

The present invention relates to an electron gun and a method for manufacturing the same, the electron gun comprising: a cathode which has an electron emission surface, has a circular planar shape, and emits electrons; a heater for raising the temperature of the cathode; and an anode for applying a positive potential to the cathode and leading out electrons in a certain direction. The cathode has a through-hole in the center portion thereof along the center axis of the cathode, and has a non-emission layer on at least one of the opening edge portion of the through-hole on the electron emission surface side and the inner surface of the through-hole, or the opening edge portion of the through-hole on the electron emission surface side is a chamfered C-surface or a chamfered R-surface.

A large electron tube (1) includes: a tubular collector (14); and a magnetic body (16) disposed outside the collector (14) and having no axial symmetry with respect to a center axis of the collector (14). This makes it possible to inhibit parasitic oscillation that occurs inside the collector (14).

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.

The invention discloses a broadband klystron amplifier injection structure, and belongs to the technical field of high-power microwaves. The injection structure comprises a coaxial waveguide channel, a four-sector waveguide channel, a double-sector waveguide channel, a rectangular-sector transition section and a rectangular input waveguide. According to the structure, a TE01 mode signal injected into the rectangular waveguide is divided into four TE01 mode signals in the fan-shaped waveguide, and then the TE01 mode signals are synthesized into TEM mode signals in the coaxial waveguide, so that broadband signal mode conversion and efficient energy injection of the input cavity of the klystron amplifier are realized, and the structure has reference significance for input structure design of the broadband klystron amplifier.

The application provides a high-power klystron collector and a preparation method thereof. By reducing the inner diameter of a straight cylinder part of the collector and lengthening the height of a taper part, part of electrons is intercepted in advance, and the electron density bombarding the top end of the collector is reduced, so that the effect of achieving the same tolerance power as a huge collector is realized under the condition of a small volume of the collector, thereby solving the technical problems of the huge volume and heavy mass of the collector mentioned above.