Three-dimensional Numerical Simulation Of S-band Tunable Relativistic Magnetron

As a high power microwave source relativistic magnetron have a wide range of applications in many areas. Because of the rising-sun tunable relativistic magnetron have many advantages for example the tunabled frequency,good pattern isolation and higher output power, there are good prospects for research and scientific value and it is expected in the future high-power microwave sources with more applications。At first, the relativistic magnetron were analyzed based on Hull cutoff conditions and Hatree vertical synchronization conditions.The A6 system relativistic magnetron and the rising-sun relativistic magnetron workspace type were compared, the rising-sun tunable relativistic magnetron has a wider operating range than A6 relativistic magnetron.Secondly, by using CHIPIC software and advanced particle simulation software simulation rising-sun relativistic magnetron type comparison and CHIPIC software simulation and experimental results, it proves CHIPIC software simulation relativistic magnetron is feasible.Next, through the simulation of the rising-sun relativistic magnetron structural parameters and operating mode of oscillation and its electrical parameters affect the output power, efficiency and output tuning bandwidth. Simulation results show that:(1)the cathode radius with output power and efficiency the rising-sun relativistic magnetron type is closely related to the appropriate cathode radius can increase the output power and efficiency;(2) the length of the cathode also have some influence on the operating characteristics and output power of the rising-sun relativistic magnetron,to a certain extent, the longer cathode length means higher output power, the shorter cathode means the higher the output efficiency;(3) coupling and coupling mouth opening angle structure has a certain influence on the Q value of the rising-sun relativistic magnetron type, within a certain range of the coupling port opening angle increases will reduce the Q value. Coupled to the output port structure is more favorable selection gradient structure;(4)Electrical parameters the impact of work on the operating characteristics and larger output power the rising-sun relativistic magnetron,select the appropriate work is very important.Finally, the impact of the above factors in the rising-sun relativistic magnetron-typeanalysis, the rising-sun relativistic magnetron-type structure and optimization of electrical parameters, the simulation results when thethe rising-sun relativistic magnetron type work center at 800 KV and 0.64 T, the depth of the small chamber can be tuned to 3mm-24 mm, about 1GHz bandwidth tuning between 3.13 GHz with 2.12 GHz,over the entire bandwidth,output power is greater than 1.45 GW.When the depth of the cavity in a small 10 mm, the rising-sun relativistic magnetron has a maximum power of2.94 GW.