A k-band coaxial relativistic return wave oscillator

Abstract

The invention discloses a K-waveband coaxial relativistic backward wave oscillator. The oscillator comprises positive electrode, a negative electrode, an electron beam guide grid mesh and a coaxial inner conductor, wherein the positive electrode is a cylindrical waveguide cavity containing a slow-wave structure; the negative electrode is arranged in the cylindrical waveguide cavity and connected with one end plane of the positive electrode through an insulator; the electron beam guide grid mesh is arranged in the cylindrical waveguide cavity and positioned in the downstream of the electron transmitting end of the negative electrode; the coaxial inner conductor adopts a cylindrical structure; one end of the coaxial inner conductor is arranged in the cylindrical waveguide cavity while the other end of the coaxial inner conductor is connected with the other end plane of the positive electrode through a metal bracket; and a coaxial structure is formed by the coaxial inner conductor, the negative electrode and the cylindrical waveguide cavity. According to the K-waveband coaxial relativistic backward wave oscillator, the electron beam guide grid mesh with the electron beam transmittance of greater than 90% is adopted for guiding electron beams to enter a beam interaction region, so that the required external magnetic field intensity is lowered, the guide magnetic field required by a device is reduced to 0.5T, the huge size of the guide magnetic field system on the exterior of the device is reduced, and requirement on the energy source supply is reduced.

Description

technical field [0001] The invention relates to the technical field of high-power microwave devices, in particular to a K-band coaxial relativistic return wave oscillator. Background technique [0002] With the development of high-power microwave research, higher and higher requirements are put forward for the total system efficiency of high-power microwave sources. In the existing high-power microwave sources, high-impedance devices have high beam conversion efficiency, but generally require a strong guiding magnetic field, especially when the microwave source operates at a repetition rate, a bulky, high-energy-consuming Solenoid magnet system or use troublesome superconducting magnet system; while low impedance devices require a pulsed power source with higher output power, and the beam conversion efficiency of the device is limited. Therefore, how to design a microwave source with low guiding magnetic field, high efficiency and high power has always been one of the goals...

AI Technical Summary

Problems solved by technology

In existing high-power microwave sources, high-impedance devices have high beam conversion efficiency, but generally require a strong guiding magnetic field, especially when the microwave source operates at a repetition rate, a bulky, high-energy-consuming Solenoid magnet system or use troublesome superconducting magnet system; while low impedance devices require a pulsed power source with higher output power, the beam conversion efficiency of the device is limited

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