Distributed radiation coupling loss circuit applied to gyrotron traveling wave tube

Abstract

The invention discloses a distributed radiation coupling loss circuit applied to a gyrotron traveling wave tube, and belongs to the technical field of microwave and millimeter wave vacuum devices. According to the invention, self-oscillation of a TE11 mode and backward wave oscillation of a TE21 mode can be effectively suppressed. Meanwhile, high-power electromagnetic energy generated due to beam-wave interaction is guided into the rhombic waveguide and can be absorbed by the attenuation materials tightly attached to the side walls of the two wide edges of the rectangular waveguide. The surface area of the continuous attenuation material tightly attached to the side walls of the two wide edges of the rectangular waveguide is far larger than that of an attenuation ceramic ring in a high-frequency interaction circuit of a traditional medium-loaded gyrotron traveling wave tube, so that the heat dissipation area is increased; the problem that the medium loading section of the traditional medium loading gyrotron traveling wave tube absorbs excessive energy to generate high temperature and then overheat and exhaust gas is solved. Therefore, the beam-wave interaction efficiency, the stability and the power capacity of the gyrotron traveling wave tube are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave vacuum devices, in particular to a distributed radiation coupling loss circuit applied to a cyclotron traveling wave tube. Background technique [0002] The gyrotron traveling wave tube has the characteristics of high efficiency, high power, wide frequency band, and high gain, so it has broad application prospects in the fields of high-resolution radar, high-power communication systems, and electronic warfare systems, and has received domestic and international attention. highly valued. [0003] The high-frequency interaction circuit of the medium-loaded TWT is the core of the TWT, and its structure affects the bandwidth, gain, and efficiency of the TWT. The high-frequency interaction circuit of the traditional medium-loaded Gyro TWT generally adopts a two-stage structure: a smooth waveguide section and a dielectric-loaded section. In traditional medium-loaded gyrotraveling...

AI Technical Summary

Problems solved by technology

In traditional medium-loaded gyrotraveling wave tubes, electron beams interact with each other in the high-frequency structure to generate high-power electromagnetic field energy, which causes the lossy medium in the medium-loaded section to absorb excess energy to generate high temperature and overheat the outgassing, thereby affecting the gyrotron motion. Wave tube stability and power handling

At the same time, due to the large changes in the dispersion curve and field distribution of the working mode of the electromagnetic wave during the medium loading, the dispersion curve of the electron beam and the high-frequency electromagnetic field cannot achieve the best synchronization conditions during the beam-wave interaction process. good, which affects the injection-wave interaction efficiency and output power of the gyro TWT

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