Novel wideband dielectric loaded gyro traveling wave tube high frequency system

Abstract

The invention discloses a novel wideband dielectric loaded gyro traveling wave tube high frequency system, and belongs to the technical field of microwave, millimeter wave and terahertz devices. The system comprises pre-bunching section, a linear amplification section, a nonlinear amplification section and an output gradual change section which are sequentially connected, and is characterized in that the pre-bunching section, the linear amplification section, the nonlinear amplification section and the output gradual change section comprise a metal circular waveguide shell and an annular lossless dielectric loading waveguide which is loaded in a mode of attaching to the circular waveguide inner wall, the linear amplification section is uniformly provided with rectangular lossy dielectric pieces in the angular direction, and the lossy dielectric pieces are distributed in a periodic manner along the axial direction. Dispersion characteristics of the whole high frequency structure are changed through loading the lossless dielectric waveguide, an electron beam curve and a waveguide dispersion curve are enabled to meet resonance conditions within a wide frequency band range, and wideband operating characteristics are ensured; and meanwhile, a gradually changing output structure is adopted, so that a problem of low output power brought about by low gain of a high frequency point is solved. The system disclosed by the invention not only can meet wideband operating requirements, but also can provide high microwave power output within the frequency band range.

Description

technical field [0001] The invention belongs to the technical field of microwave, millimeter wave and terahertz devices, and in particular relates to a novel high-frequency system of a broadband medium-loaded cyclotron traveling wave tube, which can be applied to cyclotron traveling wave tubes in the millimeter wave and terahertz bands. Background technique [0002] The cyclotron traveling wave tube is a microwave amplifier based on the electronic cyclotron maser effect. It has the ability to generate broadband, high-power, and high-efficiency electromagnetic wave output in the microwave, millimeter wave, and even terahertz frequency bands. It is widely used in microwave communications. systems, millimeter wave countermeasures, millimeter wave imaging systems, etc. At present, the gyrotron traveling wave tube is in a stage of rapid development, and increasing the output power and expanding the frequency bandwidth are the two main development directions. [0003] The interac...

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Problems solved by technology

[0005] The present invention proposes a novel high-frequency system of medium-loaded wide-band gyro-traveling wave tube, which solves the problem that the existing medium-loaded structure cannot satisfy wide-band work and high power output at the same time

At the same time, the gradual change of the output structure is adopted to solve the problem of low output power caused by low gain at high frequency points, so that the high frequency system of the cyclotron traveling wave tube can not only meet the requirements of wide frequency band work, but also provide higher microwave power within the frequency band. power output

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