按照Gabor的分类,调制直流电子注以产生交变电流分量的基本方法有4种:1)发射调制——一般的收讯放大管即是; 2)偏转调制——电子注通过固定的小孔电子注偏转时,通过小孔后的电流便有了变化;3)渡越时间调制——速调管;4)径向调制。图1所示的径向调制器件是圆柱形系统。全部电极都处于均匀的轴向磁场内,磁场与阴阳极间电压V_(ac)和V_(dc)所产生的电场平行。在 According to the classification of Gabor, there are four basic methods for modulating DC injection to generate alternating current components: 1) emission modulation - the general receiver is 2) deflection modulation - electron injection through a fixed aperture When the electron beam is deflected, the current through the aperture changes. 3) Time-of-flight modulation - klystron; 4) Radial modulation. The radial modulation device shown in Figure 1 is a cylindrical system. All electrodes are in a uniform axial magnetic field, the magnetic field and the anode and cathode voltage V_ (ac) and V dc (dc) generated by the electric field parallel. in