Simulation Of Coupled-cavity Traveling Wave Tube Slow-wave Structure Of Thermal Analysis And Cold-test Characteristics Calculated

With the development of vacuum electronic technology, the requirement for the performance of Traveling-Wave Tube (TWT) from military electronic industry and commercial use becomes much higher. TWT plays an important role as high power and wide band microwave generator and microwave amplifier. The higher requirement for TWT is also being promoted by modern satellite communication, space communication, phase array radar and etc., from the aspect of smaller size, longer age, higher reliability and so on.The working frequency of TWT is very high, therefore, the size of TWT slow-wave structure is very fine. This brought much difficulty for the design. Nowadays, more and more computer simulation technology is brought into TWT design work for saving cost and improving design efficiency. It can be applied in each link of TWT design work. The main work of this thesis is simulation of the thermal characteristic and cold-test characteristic for coupled-cavity TWT slow-wave structure with ANSYS, which is a finite-element software. Then the redevelopment upon this software was performed.The relative theory basis of thermal calculation was shown. Then the details of simulating the thermal characteristic of TWT slow-wave structure with ANSYS were given. The result of thermal analysis for coupled-cavity slow-wave structure had been achieved in the form of temperature contour figure and heat flow density vector figure. This result implied the temperature distribution clearly and could be used for analyzing the reliability of TWT and its improvement. So the higher output power can be achieved.The analysis of dispersion characteristic and interaction impedance characteristic was shown. Then the derivation of boundary condition for dispersion characteristic simulation and the theory derivation of interaction impedance characteristic computed with dispersion characteristic result were all shown. Following that, the method and step of cold-test simulation with ANSYS was given. The dispersion characteristic and interaction impedance characteristic curve figures were plotted after the simulation of...