以一组非线性方程为基础，从混沌动力学角度，通过计算电子的相空间轨道和辐射场的时空分布图谱，简要分析了行波管放大器的时空混沌特性，计算了行波管输出功率的演化。计算结果表明：行波管放大器辐射场与电子束是一个非线性相互作用的耗散系统，其参数影响整个系统的行为演化，当电流和失谐量等参数变化并超过一定阈值时，系统出现时空混沌特性，输出具有连续的宽频谱性。

On the basis of the nonlinear equations, the characteristic of nonlinear chaotic dynamics was investigated in a traveling-wave tube amplifier. The phase space of the electron orbits, the time-space distribution and the output power of the radiation field were studied numerically. The result shows the radiation field and the electron beam is a dissipative system. When the parameters such as current or detuning changes and are above a certain threshold, chaotic characteristic is appeared in the whole time and space of the system. The output power is characterized by the irregularly oscillation with the wide continuous spectrum.