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A useful design technique of helix pitch profile for high-efficiency Traveling-Wave tubes (TWTs) is put forward. The purpose of the design technique is to increase the normalized axial growth rate of ac electric field amplitude by selecting an appropriate helix pitch profile and so that the power and efficiency are maximized.
A nonlinear beam-wave interaction has be built to simulate the BWO in Helical traveling wave tube, which is in the above of 1D beam-wave interaction model by field theory, And taking into account of angular speed which are affected by magnetic fields. The CN with different QC has be compared to equivalent circuit in small signal, that the result is close. Also, the simulated results are accorded with...
Microwave Tube Simulator Suite (MTSS) is a full-featured software package for microwave tube analysis and design. It has been developed by University of Electronic Science and Technology of China (UESTC) and validated against some helix traveling wave tubes.
In this paper, an optimization algorithm has been developed to provide robust designs for nonlinear beam-wave interaction of high-frequency traveling-wave tubes (TWTs). The algorithm utilizes the optimization method of hybrid genetic algorithm (Goldberg, 1990) in the TWT simulation code which is much like CHRISTINE-1D (Antonsen, 1998). By considering the effects of dimensional helix pitch variations...
In the part of the helix TWTs' nonlinear beam-wave interaction, we developed a 3D relativistic beam-wave interaction model, which can describe the interaction process between the symmetric TMO1 mode RF electromagnetic fields and the relativistic electron beam. This model can describe the 3D RF electromagnetic fields, the 3D motion of the macro-particles, and the 2D space-charge fields. Applying the...
Recent advances of TWTCAD Integrated Framework, a 2D modeling and simulation code suite for traveling wave tube, will be presented. The use of the suite is more convenience, and the simulation result is more accurate. All modules of TWTCAD are improved. TWTCAD is applying and validating in microwave industry broadly.
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