如果电子注型电子管中的收集极收集几乎是零速的全部电子,那么管子的效率将接近于一。这种收集极可称为软着陆收集极。本文叙述这种新型收集极的原理、设计理论、初步的实验及其应用,在这种收集极中能够实现使电子几乎全部软着陆。装有这种收集极的实验行波管可以将效率由19％提高到46％。 If the collector in an electron-injecting tube collects nearly all of the electrons at zero speed, the efficiency of the tube will be close to one. This collection can be called a soft landing collector. This article describes the principle, design theory, preliminary experiments and their applications of this new collector, which enables almost all soft landing of electrons in this collector. The experimental TWT with this collector increases the efficiency from 19% to 46%.