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改进稳态行波管场论大信号互作用模型,将工作频率考虑为最小公因子基波的整数倍,采用频域等效粒子模拟算法,求解离散化亥姆霍兹方程获得空间电荷场数值解,建立半解析半粒子的2.5维行波管多频互作用模型,模拟多频工作时行波管中信号间的交调和互调的非线性特性,计算结果与L波段螺旋线行波管的互调、三阶和五阶交调试验比较具有较好的一致性。
The large-signal interaction model of steady-state traveling-wave tube theory is improved. The working frequency is considered as an integer multiple of the fundamental factor of the smallest common factor. The frequency-domain equivalent particle simulation algorithm is used to solve the discretized Helmholtz equation to obtain the space charge field value The semi-analytic half-wave 2.5-D TWT multi-frequency interaction model is established to simulate the nonlinear characteristics of the intermodulation and intermodulation of the TWT signals. The calculated results agree well with the L-band helical TWT Of the intermodulation, third-order and fifth-order intermixing test has better consistency.