239results about "Transit-tube circuit elements" 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.

The invention discloses a structure for inhibiting front cavity interaction in a frequency-adjustable high-power gyrotron, which is used for carrying out PIC analogue simulation on the basis of a frequency-adjustable gyrotron developed in a laboratory, and verifying the front cavity interaction by utilizing a gyrotron linear theory and a generalized scattering matrix theory according to a generation principle of the front cavity interaction. And on the basis, adjustment and simulation analysis are carried out on the cavity structure of the gyrotron, a feasible way for inhibiting the interaction of the front cavity is found out, and stable work of the gyrotron during frequency tuning is ensured. The structure is composed of the periodic loading dielectric waveguide from the rear end of the electron gun to the beam-wave interaction front end, the design is simple, the cost is low, and the problems that the overall efficiency of the gyrotron is reduced and the working stability of the gyrotron is damaged due to interaction of the front cavity of the non-interaction section in the existing gyrotron are solved.

The invention discloses a miniaturized high-efficiency multi-beam klystron based on a double-ridge porous metamaterial unit, which comprises a first cavity, a first drift tube combination, a second cavity, a second drift tube combination, a third cavity, a third drift tube combination and a fourth cavity which are connected in sequence, the second cavity is provided with a coaxial energy output device. The first cavity, the second cavity, the third cavity and the fourth cavity are all cylindrical resonant cavities, a pair of internal drift tubes and a double-ridge porous metamaterial unit are arranged in each cylindrical resonant cavity, and the pair of internal drift tubes are arranged at the two ends of each cylindrical resonant cavity; the input direction of the klystron is defined as the left side, and an internal drift tube on the left side in the cylindrical resonant cavity is fixedly connected with the double-ridge porous metamaterial unit, so that the device can realize miniaturization, low voltage and high efficiency while outputting high power.

The invention discloses a feedback oscillator structure applied to a traveling wave tube. The feedback oscillator structure comprises a waveguide structure, a resonant cavity frequency selection structure and a waveguide power regulation structure which are connected in sequence, the input end of the waveguide structure is connected to the output end of the traveling wave tube, the waveguide structure and the resonant cavity frequency selection structure are connected through a coupling gap, the resonant cavity frequency selection structure and the waveguide power regulation structure are connected through a coupling gap, and the output end of the waveguide power regulation structure is connected to the input end of the traveling wave tube; by utilizing the frequency selection characteristic of the resonant cavity frequency selection structure, the resonant cavity eigenfrequency part in clutters output by the output end of the traveling wave tube is selected, and the clutters are input into the input end of the traveling wave tube again after the power is adjusted, so that the self-oscillation of the traveling wave tube with the adjustable frequency is realized. The feedback oscillator structure does not need a solid-state oscillation source, realizes high-power output of the traveling wave tube when input signals are not added in a terahertz frequency band, has a frequency modulation function, and is relatively pure in frequency spectrum of output signals.

The invention provides a structure for improving electron beam energy distribution after beam-wave interaction. The structure comprises a traveling wave interaction circuit, a standing wave interaction circuit and a step-down collector which are sequentially arranged in the electron beam transmission direction. The standing wave interaction circuit comprises a resonant cavity; an electron beam channel of the traveling wave interaction circuit is communicated with an electron beam channel of the standing wave interaction circuit; and the step-down collector is communicated with an electron beam channel of the standing wave interaction circuit. The structure can solve the problem that the whole optimization process becomes more complex due to the existing mode of improving the energy recovery efficiency by optimizing the traveling wave interaction circuit.

The invention relates to a microwave source device in the technical field of high-power microwaves, in particular to a two-stage modulated low-magnetic-field high-efficiency coaxial relativistic klystron oscillator loaded with a second harmonic cavity. Comprising a cathode seat, a cathode, an anode outer cylinder, an inner cylinder, a collimation hole, a first-stage modulation cavity, a first-stage second harmonic cavity, a first-stage drift section, a second-stage second harmonic cavity, a second-stage drift section, a second-stage modulation cavity, a third-stage drift section, an extraction cavity, a collector, a coaxial output waveguide and a solenoid magnetic field. The whole structure is rotationally symmetrical about a central axis; the two second harmonic cavities are added between the first-stage modulation cavity and the second-stage modulation cavity, electron beams are modulated for four times, the fundamental wave modulation depth and the second harmonic modulation depth of the electron beams are improved, the problem of poor electron beam bunching under a low guide magnetic field is solved, the beam-wave action efficiency of a device under the low guide magnetic field is further improved, and the device performance is improved. The output microwave power of the device is increased, miniaturization of the device is facilitated, the action distance is increased, and the application scene of the device is widened.

The invention discloses a slow wave structure, a traveling wave tube and network equipment, and relates to the technical field of vacuum electronics. The slow-wave structure comprises a shell, a slow-wave transmission line, an input coupler and an output coupler, the shell comprises a first shell cover and a second shell cover which are connected in a stacked mode in the first direction, so that the slow-wave structure is of a stacked structure, the slow-wave transmission line is located on a first plane perpendicular to the first direction, and the input coupler and the output coupler are electrically connected with the slow-wave transmission line. At least one of the input coupler and the output coupler is not coplanar with the first plane, so that the at least one of the input coupler and the output coupler has good consistency with the stacking direction, the production and assembly of the input coupler and / or the output coupler are simplified, the integration level of the input coupler and the output coupler is improved, and the cost is reduced. And miniaturization of the slow wave structure is realized.

The embodiment of the invention discloses a traveling wave tube high-frequency assembly and an assembling method thereof, the traveling wave tube high-frequency assembly comprises a traveling wave tube high-frequency assembly, the high-frequency assembly comprises a composite tube shell and an all-metal slow wave structure arranged in the composite tube shell, the composite tube shell comprises an electron gun welding disc, a pole shoe, a spacer ring and a collector welding disc, and the electron gun welding disc, the pole shoe and the spacer ring are brazed together. The all-metal slow-wave structure is composed of a plurality of radial sub-cavities, and the radial sub-cavities are fixed in the composite tube shell through high-temperature diffusion welding. The high-frequency assembly does not need to use a thin-wall tube shell, is simple to assemble, can reduce the inner diameter of a magnetic system, increases bunching current, and further increases the output power under the condition that the voltage is not changed. The composite tube shell and the all-metal slow wave structure are matched through a circle, and the machining precision error can be 0.08 mm. The multiple radial sub-cavities can be fixed in the composite tube shell only through high-temperature diffusion welding, the technological process is simple, the assembly efficiency and precision are high, and the problem that the matching degree becomes poor due to the fact that welding flux flows into the slow-wave structure is solved.

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.

A plasma processing apparatus includes a temperature regulator, which includes a plurality of fans and provides a flow path, wherein the flow path is axially or rotationally symmetrical with respect to a central axis and includes a first partial flow path and a second partial flow path, and wherein the first partial flow path extends along an upper surface of an excitation electrode, and the second partial flow path extends alternately in opposite directions between the plurality of fans and the first partial flow path.

Vacuum electron devices (VEDs) having a plurality of two-dimensional layers of various materials are bonded together to form one or more VEDs simultaneously. The two-dimensional material layers are machined to include features needed for device operation so that when assembled and bonded into a three-dimensional structure, three-dimensional features are formed. The two-dimensional layers are bonded together into a sandwich-like structure. The manufacturing process enables incorporation of metallic, magnetic, ceramic materials, and other materials required for VED fabrication while maintaining required positional accuracy and multiple devices per batch capability.

The invention relates to a microwave source device in the technical field of high-power microwaves, in particular to an L-band compact relativistic Cerenkov microwave generating device, and belongs to the technical field of high-power microwaves. Comprising a cathode structure, an external electromagnetic structure and an internal electromagnetic structure, and the cathode structure comprises a cathode seat and a cathode; the external electromagnetic structure comprises an anode outer cylinder, an outer cut-off neck, outer conductor ripples, a collector, a collector baffle and a solenoid coil; the internal electromagnetic structure comprises an inner cut-off neck, an inner conductor ripple, a short circuit block and a microwave output port; the whole structure is rotationally symmetrical about a central axis; through reasonable design of an electromagnetic structure, a coaxial non-uniform double-ripple slow-wave structure is adopted to enhance beam-wave coupling, a high-efficiency beam-wave effect is realized in a relatively short period, and a coaxial collector structure is adopted to improve the resonance characteristic of the slow-wave structure to reduce the axial size, so that miniaturization and compactness of the device are realized.

The utility model relates to the technical field of vacuum electronics, in particular to a trapezoidal staggered gate slow-wave structure of a circular electron beam channel, which comprises a metal shell, trapezoidal upper metal gates and trapezoidal lower metal gates which are symmetrically arranged in a staggered manner are arranged in the metal shell, and the upper metal gates and the lower metal gates are respectively provided with arc-shaped concave holes; along the electron transmission direction, the concave holes respectively penetrate through the upper metal gate and the lower metal gate, and the upper and lower concave holes are enclosed to form a circular electron beam channel. Through the slow-wave structure, the bandwidth of the slow-wave structure can be increased, so that the longitudinal electric field in the slow-wave structure is enhanced.

The invention discloses a slow wave structure loaded with a wave-absorbing metamaterial and a traveling wave tube. The technical field of microwave electronics; comprising a closed metal cavity structure for transmitting electromagnetic waves and a wave-absorbing metamaterial structure loaded on the wall surface of the closed metal cavity structure, the working frequency band of the wave-absorbing metamaterial structure is the non-working mode frequency band of the slow wave structure; according to the scheme, structural improvement is carried out on the basis of a traditional slow wave structure, and non-working mode signals are filtered out by loading the wave-absorbing metamaterial of the non-working mode frequency band in the slow wave structure; the loading of the wave-absorbing metamaterial has no influence on the working mode of the slow wave structure, but absorbs the non-working mode to achieve the filtering effect, thereby achieving the effect of inhibiting mode competition.

To provide a magnetron capable of suppressing an oscillation stop due to the generation of an abnormal oscillation while preventing damages of a coil.SOLUTION: A magnetron is a high-output type industrial magnetron. Each of all plate-like vanes 52 belonged to a first plate-like vane group 52g1, and all plate-like vanes 52 belonged to a second plate-like vane group 52g2 includes at least three or more same numbers of penetration holes 52h at near from a tip end of a direction of a center shaft. As using n a numeric value indicating an odd number that is started from 1, nth pressure equalization annular 64_n is penetrated so as to be contacted to nth penetration hole 52hn of all of the plate-like vane belonged to the first plate-like vane group 52g1, and a n+1th pressure equalization annular 64_n+1 is penetrated so as to be contacted to a n+1th penetration hole 52gn+1 of all of the plate-like vane belonged to the second plate-like vane group 52g2.SELECTED DRAWING: Figure 5

A slow-wave structure, a traveling wave tube, an electronic device, and a communication system are provided. The slow-wave structure includes a folded waveguide structure, where the waveguide structure has a cycle in a longitudinal direction and an amplitude in a transverse direction perpendicular to the longitudinal direction, and at least one of an amplitude of a first part of the waveguide structure and a cycle of the first part gradually changes in the longitudinal direction. Therefore, reflection of the slow-wave structure can be reduced, backward wave oscillation can be effectively suppressed, and a wider operating bandwidth can be obtained.

This disclosure provides a planar resonant cavity for a planar gyrotron and a method for increasing its output power, relating to the field of microwave technology. The planar resonant cavity includes: a resonant cavity for increasing the energy of electromagnetic waves; wherein the energy of the electromagnetic waves gradually increases based on the interaction between the electron beam and the electromagnetic wave; electron emitting surfaces, respectively disposed at the upper and lower ends of the cavity surface in the negative Z direction, for emitting electron beams; wherein the electron emitting surfaces at the upper and lower ends of the cavity surface are symmetrical based on both the central YZ plane and the central XZ plane of the resonant cavity; and baffles, including a left baffle and a right baffle, the left and right baffles having identical structures, respectively disposed in the X direction of the resonant cavity between the electron emitting surfaces and the two ends of the resonant cavity, for reflecting electromagnetic waves to enhance the interaction between the electron beam and the wave, increase the energy of the electromagnetic waves, and increase the output power of the electromagnetic waves.

A folding cascade design is adopted, a single-section amplification process of a traditional slow wave structure is decomposed into a plurality of continuously cascaded amplification stages, namely slow wave sub-structures, each stage is provided with an independent electron beam for driving, an output signal of a front stage is directly fed into a rear stage to serve as input, and the output signal of the rear stage is directly fed into the slow wave sub-structures. In this way, step-by-step transmission and amplification of signals are achieved, high-efficiency sectional signal amplification is achieved, and the working bandwidth and output power of an original structure are not damaged while the interaction length of the slow wave structure is effectively shortened. In order to optimize the layout and reduce the structural size, the signal propagation directions of two adjacent stages are arranged in opposite directions, so that the output end of the front stage is directly aligned with the input end of the rear stage in space, and a compact folding topological structure is formed. Efficient signal transmission between stages is realized through the coupler and the waveguide, and the whole slow wave structure only reserves one input port and one output port, so that the integration level is remarkably improved, the manufacturing complexity is not increased, and meanwhile, the performance of an output signal is not deteriorated. And the electron beams are emitted along the signal transmission direction of each stage, so that the electron beams of two adjacent stages are arranged in a staggered manner in space.

Vacuum electron devices (VEDs) are produced having a plurality of two-dimensional layers of various materials that are bonded together to form one or more VEDs simultaneously. The two-dimensional material layers are machined to include features needed for device operation so that when assembled and bonded into a three-dimensional structure, three-dimensional features are formed. The two-dimensional layers are bonded together using brazing, diffusion bonding, assisted diffusion bonding, solid state bonding, cold welding, ultrasonic welding, and the like. The manufacturing process enables incorporation of metallic, magnetic, and ceramic materials required for VED fabrication while maintaining required positional accuracy and multiple devices per batch capability. The VEDs so produced include a combination of magnetic and electrostatic lenses for electron beam control.

The invention discloses a miniaturized periodic permanent magnet focusing metamaterial backward wave oscillator, which comprises a metamaterial slow wave structure, a coupling cavity, a periodic permanent magnet focusing system and a coaxial output interface, the metamaterial slow-wave structure comprises a waveguide shell, a periodic resonance structure and a first vacuum gap; the coupling cavity comprises a coupling cavity shell, a coupling cavity inner conductor and a second vacuum gap; the coupling cavity inner conductor is connected with the periodic resonance structure and the coaxial output interface; the periodic permanent magnet focusing system comprises a first permanent magnet focusing structure and a second permanent magnet focusing structure which are asymmetrically arranged up and down, and the metamaterial slow wave structure is arranged between the first permanent magnet focusing structure and the second permanent magnet focusing structure. According to the backward wave oscillator, the metamaterial slow wave structure and the periodic permanent magnet focusing system are arranged, and the coupled cavity is multiplexed as the collector, so that the size of the backward wave oscillator is reduced. And an asymmetric focusing magnetic field is generated through the asymmetrically arranged periodic permanent magnet focusing system, so that electron beams can perform energy exchange better.

The invention provides a magnetron structure. The magnetron structure comprises a main body part which is provided with an accommodating cavity; the main body part is provided with a plurality of fan blade parts, and the multiple fan blade parts are arranged around the containing cavity at intervals; a resonant cavity is formed in a gap between every two adjacent fan blade parts; the resonant cavity is communicated with the accommodating cavity; the mounting groove is formed in the multiple fan blade parts and communicates with the resonant cavity, so that an annular groove is defined; the diaphragm belt is arranged in the mounting groove; wherein the mounting groove comprises a shallow groove section and a deep groove section, and the depth of the deep groove section is larger than that of the shallow groove section in the extending direction of the containing cavity; at least two shallow groove sections and at least two deep groove sections are arranged, and the shallow groove sections and the deep groove sections are alternately arranged at intervals. Through the technical scheme provided by the invention, the technical problem that the supporting stability of the structure for supporting the diaphragm belt in the magnetron in the prior art is relatively poor can be solved.

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.

This application provides a travelling-wave tube, an electron gun, and a power amplification system, to improve electronic efficiency of the travelling-wave tube when the travelling-wave tube performs linear amplification on a radio frequency signal, thereby effectively reducing power consumption of the travelling-wave tube. The travelling-wave tube includes an input apparatus, a control circuit, an electron gun, a slow-wave circuit, and an output apparatus. The input apparatus may be configured to: receive a radio frequency signal, and feed the radio frequency signal into the slow-wave circuit. The control circuit may be configured to: determine a quantity N of electron beams and currents of the N electron beams, and control the electron gun to emit the N electron beams. Further, the slow-wave circuit may perform beam-wave interaction with the N electron beams, to amplify power of the radio frequency signa, and because the slow-wave circuit works in a saturation region, electronic efficiency of the travelling-wave tube can be greater than or equal to a first threshold. The output apparatus may output an amplified radio frequency signal.

The invention provides a slow wave structure, a terahertz traveling wave tube device and a communication device. According to the slow wave structure provided by the invention, the first sub slow wave structure and the second sub slow wave structure are ingeniously combined, so that the technical problem of insufficient output power in the prior art can be effectively solved. Specifically, the first sub-slow-wave structure performs cluster modulation on the electron beam through preset strong coupling impedance, so that the density and the modulation efficiency of the electron beam are improved; and the second slow wave sub-structure ensures that the electron beams subjected to cluster modulation can efficiently export microwave energy through the design of low transmission loss, so that the energy loss is obviously reduced. Through the innovative structural design, higher output power can be provided at a high frequency band, attenuation of microwave signals is effectively reduced, the overall performance of the system is improved, and the application requirements of high power and high efficiency are met.

The application discloses a broadband folded full-metal slow wave structure, which comprises a first grid body and a second grid body arranged in a central symmetry; the first grid body and the second grid body enclose an electron beam channel; the first grid body comprises a plurality of metal grids arranged at equal intervals along a direction of a traveling wave; a cross section of the metal grid along the direction of the traveling wave comprises a first rectangular section, a trapezoidal section and a second rectangular section connected in sequence; the first rectangular section is provided with an arc-shaped opening with an opening direction away from the trapezoidal section; the arc-shaped opening comprises a first opening and a second opening; a hollowed-out part of the first opening is a rectangular body, and a hollowed-out part of the second opening is a semi-cylindrical body. By setting the hollowed-out part of the first opening as the rectangular body and the hollowed-out part of the second opening as the semi-cylindrical body, a ring-shaped tip of the slow wave structure is prevented, the slow wave structure is easy to manufacture, the dispersion characteristic is improved to expand a bandwidth, high-frequency loss is reduced, and output power, gain, bandwidth and interaction efficiency of the traveling wave tube are improved.

The invention relates to the technical field of vacuum electronics, and discloses a large-radius spiral waveguide slow wave device (including a traveling wave tube and a backward wave tube). The high-frequency structure of the novel slow-wave device is a two-dimensional periodic slow-wave structure formed by spirally winding a rectangular waveguide along a large-radius cylindrical surface. The transverse size of an electron beam channel can be greatly increased by increasing the spiral radius, so that higher injection electron beam power (under the same current density) is provided, and the output power is greatly improved. Compared with an existing slow-wave device, the large-radius spiral waveguide slow-wave device has the advantages that the output power can be greatly improved (in magnitude), and the bottleneck that the power of an existing vacuum electronic slow-wave device is limited can be broken through.

The invention discloses a gyrotron high-frequency interaction structure formed by continuous curves, which is characterized in that the gyrotron high-frequency interaction structure is composed of a cut-off section, an interaction section and an output section of a cubic spline difference fitting curve structure, and the curve slope at the joint of the cut-off section and the interaction section and the curve slope at the joint of the interaction section and the output section are consistent. Through the high-frequency interaction structure, a higher harmonic working mode can be excited in a terahertz frequency band, and the output characteristics of high efficiency and wide bandwidth are achieved. Under the working condition of a high-order axial mode, the gyrotron has stable output power and linear frequency change in the frequency adjusting process, and the effective working bandwidth is remarkably improved. The problems of power fluctuation and frequency hopping of the gyrotron under the working condition of a high-order axial mode are effectively solved, so that an excellent output effect is obtained.

This invention discloses a slow-wave structure and circuit suitable for high-order modes, including a housing, an upper gate extending from the top wall to the bottom wall of the housing, and a lower gate extending from the bottom wall to the top wall of the housing. Multiple upper and lower gates are staggered, defining multiple periodic vacuum cavities. The upper and lower gates have different heights along the height direction of the slow-wave structure. An electron beam channel is formed between the upper and lower gates. This invention can suppress low-order mode competition and back-wave oscillations at low operating voltages, achieving stable operation in high-order modes and achieving high output power of 100W or more with low voltage.

Provided in the present application are a traveling-wave tube, a transmitter, an electronic device and a signal processing method. The traveling-wave tube comprises an input apparatus, an electron emission apparatus, a plurality of slow-wave structures and an output apparatus, wherein at least one transmission channel is formed in the plurality of slow-wave structures, and the number of transmission channels is less than the number of slow-wave structures; the input apparatus is used for receiving a plurality of radio-frequency signals and feeding the plurality of radio-frequency signals into the plurality of slow-wave structures; the electron emission apparatus is used for emitting an electron beam into the at least one transmission channel of the plurality of slow-wave structures; the plurality of slow-wave structures are used for respectively receiving the plurality of radio-frequency signals, and using the electron beam to respectively amplify the plurality of radio-frequency signals, so as to obtain a plurality of amplified radio-frequency signals; and the output apparatus is used for outputting the plurality of amplified radio-frequency signals. The present application can reduce the volume of a traveling-wave tube, thereby decreasing the cost of the traveling-wave tube.