| 摘要 |
<p>1,271,604. Pulse radar. CANADIAN PATENTS & DEVELOPMENTS Ltd. 20 Jan., 1970 [28 Jan., 1969], No. 2724/70. Heading H4D. An anti-clutter radar receiver includes a phase-preserving logarithmix I.F. amplifier 27, an M.T.I. ground-clutter cancellation unit 29 and a logarithmic video amplifier in conjunction with a fast-time-constant circuit 33. Rain clutter is reduced by the latter.</p> |
