The invention discloses a large-span waveband dual-band controllable relativistic backward-wave oscillator The oscillator comprises an insulating end and an L waveband relativistic backward-wave oscillator connected with the insulating end, wherein positive electrodes are arranged in the insulating end; the positive electrodes are dual-diameter electron beam transmitting negative electrodes; a Ku waveband relativistic backward-wave oscillator is arranged in the cavity of the L waveband relativistic backward-wave oscillator; the L waveband relativistic backward-wave oscillator and the Ku waveband relativistic backward-wave oscillator are fixed into one body through supporting circular rings; and the L waveband relativistic backward-wave oscillator, the Ku waveband relativistic backward-wave oscillator and the negative electrodes are arranged on the same horizontal axial line According to the oscillator, the structural characteristics of the coaxial relativistic backward-wave oscillator are studied; the coaxial internal conductor in a low-frequency device is taken as a high-frequency-band device; and by adoption of the controllable dual-diameter electron beams, the relativistic backward-wave oscillator can generate the L waveband single-frequency high-power microwave and the Ku waveband single-frequency high-power microwave in sequence, or generate the L waveband dual-frequency high-power microwave and the Ku waveband dual-frequency high-power microwave simultaneously according to needs

Large-span waveband dual-band controllable relativistic backward-wave oscillator

We propose a novel dual-frequency high-power microwave generator consisting of both an axial generator and a radial one stretching from the middle of the tube head of the former. As a high-voltage pulse is injected into the diode system, a cathode with two blades generates two relativistic electron beams that separately travel through the axial and radial diodes. Therefore, both the subsources are driven by the relativistic beams and generate intense microwave pulses simultaneously. An axial relativistic backward-wave oscillator and a radial transit-time oscillator are designed and combined to realize this purpose. Particle-in-cell simulation shows that when the diode voltage is 505 kV, microwaves with powers of 0.95 and 1 GW are generated in the axial and radial subsources, with frequencies of 15.2 and 9.5 GHz, respectively. An equivalent efficiency of over 35% is achieved with an axial magnetic field of 0.86 T and a radial magnetic field of 0.5 T.

A Dual-Frequency High-Power Microwave Generator

The invention discloses a repetition-frequency low-magnetic-field axial C-waveband high-power microwave device. The device comprises an anode, a cathode, a guiding magnetic field generator, slow wave structures and a coaxial internal conductor, the anode is internally provided with an emission area and a beam wave interaction area, the cathode is arranged in the emission area, the slow wave structures and the coaxial internal conductor are arranged in the beam wave interaction area of the anode, the cathode is coaxial with the coaxial internal conductor, the slow wave structures are fixed to the inner side of the anode and arranged in the periphery of the coaxial internal conductor, a vacuum cavity is formed by vacuum pumping in the repetition-frequency low-magnetic-field axial C-waveband high-power microwave device, and the vacuum degree of the vacuum cavity does not exceed 10mPa. A baffle plate is arranged between the emission area and the beam wave interaction area. The baffle plate is provided with an annular inlet for guiding high-current electron beams generated by the cathode into the beam wave interaction area, and the diameter of the annular inlet is consistent with that of the cathode. The device is characterized by being capable of generating C-waveband high-power microwaves in repetition frequency and high in the beam wave conversion efficiency.

Repetition-frequency low-magnetic-field axial C-waveband high-power microwave device

The invention belongs to a millimeter wave expansion interaction device in a vacuum electronic device The millimeter wave expansion interaction device comprises a device body which consists of a shell and a core body, an annular barrel-type coupling channel, circular annular resonant cavities and electron beam channels, output waveguide and coupling holes The millimeter wave expansion interaction device adopts the cylindrical body and the circular annular resonant cavities which are formed around the axis of the core body in parallel at intervals; the lengths of inner circumference and outer circumference of the resonant cavities are far greater than working wavelengths; 5-19 resonant cavities and 5-20 electron beam channels can be set, and the lengths of the device can be greatly shortened, so that impedance, power capacity and output power of the device can be effectively improved; by means of controlling the radial dimensions of each resonant cavity to be within a range of 2/5-3/5 of the working wavelengths , the long-term stable operation of the device in base mode state can be ensured; and therefore, the millimeter wave expansion interaction device has the characteristics of capability of improving output power of the device in a base mode state and working performance stability of the device, simple structure, simple and convenient production process, low production cost, long working service life and the like

Millimeter wave expansion interaction device adopting coaxial resonant cavities and multi-electron beams

The present invention discloses a three-frequency controllable high power microwave device, which utilizes structure features of a coaxial relativistic backward wave oscillator to make the coaxial inner conductor in a low frequency device a high frequency band device and makes use of coaxial controllable three-diameter electron beams to make the relativistic backward wave oscillator generate single-frequency high-power microwaves in sequence of low-frequency, medium-frequency and high-frequency according to the needs. The controllable three-diameter cathode consists of a coaxial inner annular cathode, a middle annular cathode and an outer annular cathode, and is fixedly connected to the stepping motors which controls the axial positions of the cathodes. For the controllable adjustment to the three stepping motors, it is possible to realize the control over the three-diameter cathodes to generate electron beams with varied diameters. In the invention, the frequencies of the microwave device can be designed for actual requirement. Simple and flexible in structure, it is possible to generate three-frequency controllable high power micro waves in a high power microwave device.

Multi-frequency controllable high-power microwave device

The utility model discloses a L wave band, controllable high power microwave device of ku wave band dual -frenquency, include: insulating end, the L wave band theory of relativity backward wave oscillator who is connected with the insulating end, be provided with the negative pole in the insulating end, the negative pole is two diameter electronics negative pole of tying up hair, be provided with ku wave band theory of relativity backward wave oscillator in L wave band theory of relativity backward wave oscillator's the cavity, L wave band theory of relativity backward wave oscillator and ku wave band theory of relativity backward wave oscillator are fixed as an organic whole through supporting the ring, L wave band theory of relativity backward wave oscillator, ku wave band theory of relativity backward wave oscillator, negative pole setting are on same horizontal axis, the utility model discloses utilize coaxial theory of relativity backward wave oscillator's structural feature research, regard coaxial inner conductor in the low frequency device as the high band device, utilize controllable pair of diameter electron beam to make theory of relativity backward wave oscillator can produce the L wave band as required in proper order, ku wave band single -frequency high power microwave, or produce the L wave band simultaneously, ku wave band dual -frenquency high power microwave.

L wave band, controllable high power microwave device of ku wave band dual -frenquency

The utility model discloses a disk-binary-type compact Marx generator A first semicircular capacitor set and a second semicircular capacitor set form a capacitor disk The capacitor disk is in circular ring shape A switch chamber is arranged at the middle of the circular ring, and the central point of the switch chamber is superposed with the central point of the capacitor disk Spark gap switches are arranged in the switch chamber Charging inductors include positive and negative charging inductors The positive and negative charging inductors are symmetrically distributed with respect to the diameter of the switch chamber A load resistor is arranged in the gap between the first semicircular capacitor set and the second semicircular capacitor set The charging inductors are electrically connected with the capacitor disk Two ends of each spark gap switch are respectively and electrically connected with the first semicircular capacitor set and the second semicircular capacitor set One end of the load resistor is electrically connected with an output end of the capacitor disk, and the other end of the load resistor is grounded The disk-binary-type compact Marx generator has the advantages that capacitance values can be flexibly and conveniently selected, and the structure is compact

Disk-binary-type compact Marx generator

The utility model discloses a coaxial theory of relativity backward wave oscillator of 21GHz, include: the positive pole, its cylinder waveguide chamber for including slow wave structure, the negative pole, it sets up cylinder waveguide intracavity is connected through the insulator on terminal surface of anodal, electron beam guide aperture plate, it sets up cylinder waveguide intracavity lies in the low reaches of the electron emission end of negative pole, coaxial inner conductor, it is the cylinder structure, the one end setting of coaxial inner conductor is in cylinder waveguide intracavity, the other end pass through metal support and connect on another terminal surface of anodal, just coaxial inner conductor with the negative pole cylinder waveguide chamber forms the coaxial configuration. The utility model discloses an electron beam guide aperture plate guide electron beam entering bundle ripples interaction region that the electron beam transmissivity is greater than 90% has reduced required outside magnetic field intensity for the guide magnetic field that the device needs reduces to 0.5T, has reduced the outside huge guide field system's of device size and the demand that provides the energy.

Coaxial theory of relativity backward wave oscillator of 21GHz

The utility model discloses a disk-quaternary-type compact Marx generator. A first capacitor set, a second capacitor set, a third capacitor set and a fourth capacitor set form a capacitor disk. The capacitor disk is in circular ring shape. A switch chamber is arranged in the circular ring. A first spark gap switch and a second spark gap switch are respectively arranged in the switch chamber. The number of charging inductors is four. The four paths of charging inductors are distributed in a cross shape. A load resistor is arranged in the gap between two adjacent capacitor sets. The charging inductors are electrically connected with the capacitor disk. Two ends of the first spark gap switch are respectively and electrically connected with the first capacitor set and the second capacitor set. Two ends of the second spark gap switch are respectively and electrically connected with the third capacitor set and the fourth capacitor set. One end of the load resistor is electrically connected with an output end of the capacitor disk, and the other end of the load resistor is grounded. The disk-quaternary-type compact Marx generator has the advantages that capacitance values can be flexibly and conveniently selected, and the structure is compact.

Ding Enyan

Papers

Large-span waveband dual-band controllable relativistic backward-wave oscillator

L wave band, controllable high power microwave device of ku wave band dual -frenquency

Disk-binary-type compact Marx generator

Coaxial theory of relativity backward wave oscillator of 21GHz

Disk-quaternary-type compact Marx generator