Study On X-Band Continuous-Wave High Power Gyro-TWT

As a millimeter wave and submillimeter wave source,the gyrotron traveling wave tube plays an important role in civil military communication radar and plasma heating.In the field of space communication,the X-band has an important position,and the gyrotron traveling wave tube has obvious advantages in high data transmission due to its wide frequency band characteristics.Therefore,it is necessary to study the X-band high-power continuous wave gyrotron traveling wave tube.The main challenges in CW high-power gyrotron traveling wave tubes are: 1.Absolute instability problems that are easy to face at high gains.2.Active loss of materials in continuous wave processes and heat problems caused by collector electrons.In the process,bombardment of plasma clusters,gas and other problems generated on the wall surface.In the 20th century,researchers made a lot of explorations on the theoretical research and engineering practice of gyrotron traveling wave tubes.Among them,a reliable medium loading scheme and a buck collector that reduces the collector electron energy are proposed to suppress the absolute instability of the whirling traveling wave tube to reduce the power loss.This paper mainly needs to design an X-band high-power gyrotron traveling wave tube to work stably under simulation conditions,and to study some problems caused by high-power operation.The specific work is mainly as follows:1.Introduce the principle of power amplification of the gyrotron traveling wave tube,and design a ceramic dielectric loading interaction structure that realizes stable amplification of the output signal by means of simulation tools.2.The power loss of the high-frequency interaction ceramic loading section obtained in the first part is simulated and analyzed,and a new water-cooled heat dissipation structure suitable for high dissipation density is designed.3.Under high-power working conditions,use the particle swarm optimization algorithm to optimize the structure of the collector curve,optimize a curve with a more uniform energy density,and using the depressed-collector structure to improve the efficiency of the gyro-TWT.4.Summarize the work done,and then look forward to the future.In summary,this paper analyzes the design and problems of high-power gyrotron traveling-wave tube,and provides some references for subsequent research and development.