| 摘要 |
<p>A linear electron beam tube such as an IOT includes an input cavity (6) formed from an inner body portion (12) and an outer body (13) which are joined together by a generally cylindrical electrical insulator (14). The input cavity (6) surrounds an electron gun (1) and permits electrical connection to be made to the cathode (2) and grid (3) via parts of the inner body portion (20 and 21). The construction enables high voltage parts of the arrangement to be insulated from the low voltage outer body portion whilst presenting a low leakage path for r.f. energy within the cavity (6).</p> |
