一、引言目前的微波发射机中,广泛采用行波管及速调管做为中、大功率放大器。它们在多载波工作时会产生互调失真,而互调失真的产物——互调分量——将造成对信号的干扰。互调分量的频率一般可表示为±pf_1±qf_2±rf_3±…±sf_n的形式,其中f_1,f_2,f_3……f_n是与之有关的各输入信号的频率;p、q、r……s是各频率的系数,其数值分别为零或正整数,p+q++r+…+s=1称为互调分量的阶(次)数。通常,由于相对带宽较小,只有±p±q±r±…±s=±1的那些(奇次)互调分量能够落入信号带内或其附近,故一般所谓的互调分量多是指这种成份而言。行波管及速调管对信号放大的过程中,电子与电波之间相互作用的非线性是产生互调失真的根本原因。从外特性来看就是行波管及速调管放大器的传递函数的模及相角都是输入 First, the introduction of the current microwave transmitter, the widespread use of traveling wave tube and klystron as a high-power amplifier. They produce intermodulation distortion when working with multiple carriers, and intermodulation distortion, the product of intermodulation distortion, can cause signal interference. The frequency of the intermodulation products can generally be expressed as the form of ± pf_1 ± qf_2 ± rf_3 ± ... ± sf_n, where f_1, f_2, f_3 ... f_n are the frequencies of the respective input signals; p, q, r ... s Is the coefficient of each frequency and its value is zero or a positive integer, respectively. The order of p + q ++ r + ... + s = 1 is called the order of the intermodulation components. In general, since (odd) intermodulation components of ± p ± q ± r ± ... ± s = ± 1 can fall within or near the signal band due to the relatively small bandwidth, the so-called intermodulation products are mostly In terms of this ingredient. In the process of traveling wave tube and klystron tube to signal amplification, the nonlinearity of the interaction between the electron and the electric wave is the fundamental reason of intermodulation distortion. From the external characteristics of the traveling wave tube and klystron amplifier transfer function of the model and phase angle is input