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对矩形波导、圆形波导及同轴线的主模进行了分析计算。结果表明：矩形波导是微波的最佳传输方式，相应的主模ＴＥ１０波是合理的传输模式，微波的频率为２．４５ＧＨｚ左右时，微波衰减很小。从推力器获取最高效率以及与谐振腔获得很好耦合的角度出发，圆柱谐振腔可作为推力器的“燃烧室”，ＴＭ０１１是谐振腔较好的谐振备选模式。
The rectangular waveguide, circular waveguide and the main mode of the coaxial line are analyzed and calculated. The results show that the rectangular waveguide is the best microwave transmission mode, and the corresponding mode TE10 is a reasonable transmission mode. When the microwave frequency is about 2.45GHz, the microwave attenuation is very small. From the point of obtaining the highest efficiency of the thrusters and obtaining a good coupling with the resonant cavity, the cylindrical resonant cavity can be used as the “combustion chamber” of the thruster, and the TM011 is the better resonant alternative mode of the resonant cavity.