| It is higher demand for high power microwave resource, when modern electronic warfare, broadband high power any radar system, high power jammer and microwave directional power weapon are developed fast. Broadband high power devices become main research object. Helix traveling-wave tubes are a kind of high gain, broadband, high efficiency and high power microwave/millimeterwave amplifiers, which are widely used in modern military electronic equipments, such as communications, radars, electronic warfare.Due to theoretics research on helical slow-wave system exists some hjpothesis condition, and there are some complicated loaded slow-wave structures, foreign and civil researchers search computer simulation method for the kind of the slow-wave system. With computer hardware and software technology development, it has become a new research focus on computer simulation. But computer simulation schedule is longer and operation method is more complex, civil research scholars put forward a kind of instructional method for traveling-wave tubes design using compilation software independent, so microwave tube CAD technology has become new research direction. The doctor dissertation is a sub-task in the research task of microwave tube CAD technology, analyzing high frequency slow-wave system include helical slow-wave structure and coupled-cavity slow-wave structure, putting forward a calculation method combined with computer simulation, experiment and theoretics resolution. The high frequency calculation module of "broadband high power traveling wave tube CAD integration environment" is compiled using Microsoft Visual C++6.0. It has some instructional significance for factory practicality application and operation.Several important and valuable results which bring forth new ideas are achieved and listed as the followings:(1) In the basis of the vane finite thickness model, according as the field expression of sector waveguide, referring to the boundary condition of the ridge-loaded slow wave structure in vane region, dispersion curve characteristic equation of the sector vane-loaded helical slow wave structure is newly derived using field match method. In the basis of the dispersion characteristic equation, interaction impedance equation and attenuation equation of the sector vane-loaded helical slow wave structure are derived considering the practical distribution of the setor vane.(2) In the basis of the solution method of the high frequency characteristic equation of the sector vane-loaded helical slow wave structure, according as the practical distribution of the special vane shape, the paper first put forward the equivalent process method for some special vane shapes, and the high frequency characteristic equation of the special vane-loaded helical slow wave structure in the factory practicality application is obtained again, including U shape vane, Y shape vane, tooth shape vane and T shape vane, providing theory foundation for the theory calculation of the special vane-loaded shape and the traveling-wave tubes practices design and production.(3) Because of some hypothesis conditions exiting theory calculation expressions, there are some errors in the course of the theory calculation. The paper first put forward a modified method of theroy calculation result using simulation result in the basis of the MAFIA simulation result, combining research method of resolution theroy with simulation calcualtion. Not noly it will improve calculation precision of slow wave characteristic, but also it will solidify resolution theroy expression with simulation result and experiment data. Theroy expression will be more maturity with production practise. In the basis of the modified theory expression, high frequency calculation module of "broadband high power traveling wave tube CAD integration environment" is compiled using Microsoft Visual C++6.0. It is convenient to factory practicality application.(4) Comparing the theory differentiation of the simulation calculation on high frequency cavity of Finite I...
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