A continuous wave terahertz oscillator with radial structure

Abstract

The invention discloses a radial structure continuous wave terahertz oscillator, comprising a annular metal top board, a radial transmission electronic beam, a slow wave structure, a metal transition waveguide inner cylinder, a metal transition waveguide outer cylinder, a coaxial output waveguide and a solenoid; a radial transmission electronic beam performs mutual reaction with a high frequency mutual reaction area constituted by the annular metal top plate and the slow wave structure under the guiding of a radial uniform magnetostatic field to convert the kinetic energy of the electronic beam to an electronic wave in the terahertz frequency band; finally, the radial transmission electronic beam is hit to the metal transition waveguide inner cylinder to be absorbed; and the terahertz frequency band electromagnetic wave is transmitted out through the coaxial waveguide. Because the radial structure continuous wave terahertz oscillator adopts the radial structure and the size of the electronic beam and the integral size of the radial structure continuous wave terahertz oscillator are increased, the output power of the radial structure continuous wave terahertz oscillator is improved and the processing difficulty is reduced.

Description

technical field [0001] The invention belongs to the technical field of continuous wave vacuum electronics terahertz source, and specifically relates to a terahertz band (terahertz, Terahertz, 1THz = 10 12 Hz) electromagnetic wave vacuum electronics device design. Background technique [0002] In recent years, terahertz technology has been greatly developed, and a terahertz source with a certain power output is the basis for the application of terahertz technology. The terahertz source based on vacuum electronics can produce higher output power, so the research on vacuum electronics terahertz source devices is vigorously carried out at home and abroad. The terahertz pulse signal of 1.03THz and output power of 1kW, Fukuda University in Japan has carried out experimental research on the continuous wave gyrotron in the terahertz band. The Northwest Institute of Nuclear Technology has also carried out a lot of research work on the theory, numerical simulation and experiment of ...

AI Technical Summary

Problems solved by technology

When the operating frequency of vacuum electronic devices reaches the terahertz frequency band, the electrical dimension of the cross-section of the device becomes smaller, resulting in a smaller transmission size of the electron beam, and it is difficult to guarantee the processing accuracy of the device. The traditional cylindrical high-frequency structure is based on metal The inside of the cylinder is engraved with a periodic slow-wave structure. When the operating frequency of the device reaches the terahertz band, the width and depth of the groove reach the order of microns. It is difficult to process a high-frequency slow-wave structure that meets the experimental conditions. The high-frequency structure can reduce the difficulty of processing, but at the same time it will make it difficult to control the working mode of the device; the slow-wave structure of the flat plate can reduce the difficulty of processing terahertz vacuum electronic devices, and at the same time increase the output power. The researchers developed a rectangular slow-wave structure However, due to the instability of the ribbon electron beam, only the ribbon electron beam with narrow width and limited transmission distance can be produced.

[0004] In the device proposed in the existing literature that the electron beam is transmitted along the positive radial direction, the electron beam voltage used is greater than 300kV, and the device can only work in a pulsed state; the radial guiding magnetic field strength required by the device is greater than 4.0Tesla, It cannot be realized with permanent magnets, and a bulky superconducting coil is required, which makes it difficult to design an external guiding magnetic field; at the same time, the electron gun is connected with a high-frequency structure, which is not conducive to the separate design of the electron gun

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