| 摘要 |
<p>The invention concerns amplifying microwave operating tubes. The electronic tube comprises: a pumping tip (50) for producing vacuum inside the tube; an electron gun (11) emitting an electron beam (12) inside the tube; a collector (14) directly collecting one first part of the electron beam (12). The pumping tip (50) directly repels a second part of the electron beam (12) towards the collector (14).</p> |
