Design And Implementation Of High Frequency System Of High Power TWT Based On The Thermal Performance

Traveling wave tube (TWT) is a kind of high power, high gain and broad-band microwave millimeter wave amplifier which is one of the most important electricity vacuum devices. As a key part of the helix TWT, the heat dissipation capability of the high-frequency system is the important influencing factor that restricts increasing of the average output power. The thermal performance of the SWS will also affects the stability and the reliability of the TWT.As the sub project of2-6GHz TWT project, the high frequency system of the helix TWT is researched in this thesis.1. The thermal performance of the high-frequency system of the helix TWT is researched. Based on the heat transfer theory, the thermal performance of the high-frequency system is simulated using ANSYS. Through analyzing and comparing different structure, a high-frequency system suitable for the project is put forward. Simulation results of the new structure show that, the thermal performance and reliability of TWT is effectively improved.2. The experimental methods of measuring thermal properties of the high-frequency system were researched. Bases on the thermocouple method, a test method of detecting the thermal performance of the high-frequency system is presented. The Experimental measurement results are in agreement with the simulation. The thermocouple method can be used not only to validate the simulation results, and can be used as a rapid detection method of the thermal performance of high frequency structure. It can effectively improve the rate of finished products.3. The electric parameters of the high-frequency system are researched. The dispersion and interaction impedance of the high-frequency system is designed and simulated using CST. Through comparing the effects of each key size on the electric parameters, the high-frequency structure is optimized. And it provides a strong basis for the development of TWT.Based on2-6GHz broadband high power TWT, the thermal performance and electrical properties of high frequency structure are simulated in this thesis, And finally got a high frequency structure can be used in practical engineering. It lays a solid foundation for2-6GHZ broadband TWT project.