分析了周期性慢波结构中的场分布特点，提出了一种利用粒子模拟软件Magic快速分析周期性慢波结构色散特性和描绘色散曲线的方法．以一个具体的慢波结构为实例，详细介绍这种方法的操作过程，并结合周期性慢波结构的场分布特点及其他电磁理论分析这种方法的原理，理论证明它的可行性．这种方法尽管有一定的误差，但是其操作简单而迅速，在进行一些微波电子器件的初步设计工作当中有一定的实际意义．%Distributing character of fields in SWS is analysed. A method which makes use of the Magic code to compute rapidly dispersion in SWS and to depict it ~s curves is proposed. Taking a specific construction as an example, the process of using the method is described elaborately. Meanwhile, the theory of the method is analyzed. Combining the theory of electronmagnetic and distributing character of fields in SWS,the feasibility of the method is proved. Although there is somewhat error in the result,it is easily and rapidly operated, so there are some realistic values in the design of some microwave electron struc- tures.
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