电子束的速度很容易变化,这个特性现已应用在一种新的微波延时技术上.一束电子群(电子束)离开阴极(见附图),在输入螺旋上受到正电压V_a加速,并在通过此螺旋时,电子束为输入信号(此信号将予延迟)所调制,电子束离开输入螺旋后,在装置的“漂移,区进一步受到电压V_b之加速或减速.电子束以新的速度穿过漂移区,在最后到达收集器之前,将调制信号传与输出螺旋. The electron beam velocity is very variable and this property has been applied to a new microwave delay technique: A beam of electrons (electron beam) leaves the cathode (see the photo) and is accelerated by a positive voltage V_a on the input coil, And as it passes through the helix, the electron beam is modulated by the input signal (which is to be delayed). After the electron beam leaves the input helix, the “drift” of the device is further accelerated or decelerated by the voltage V_b. The speed passes through the drift zone, before it finally reaches the collector, transmitting the modulated signal to the output screw.