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1. 发明授权

US3921173A Accurate normalization for a monopulse radar 失效
标题翻译：一个单一雷达的精确正态化
公开(公告)号：US3921173A
公开(公告)日：1975-11-18
申请号：US49743474
申请日：1974-08-14
申请人： US NAVY
发明人： THOMSON DON N
IPC分类号： G01S7/34 , G01S13/44 , G01S9/22
CPC分类号： G01S13/4436 , G01S7/34
摘要： The invention comprises a system for controlling and normalizing the gain of the difference I.f. I.F. to the gain of the sum I.F. amplifier in a monopulse radar. A pulsed, I.F., pilot signal is applied to both the sum and difference I.F. amplifiers at predetermined intervals chosen so that the pilot signal does not interfere with the echo return signal. The outputs from these I.F. amplifiers are gated at the predetermined intervals coinciding with the application of the I.F. pilot signal. These gated, sum-and difference-amplifier, pilot signals are envelopedetected and then applied to a differential amplifier. This differential amplifier generates a signal representative of the difference between the sum and difference amplifier pilot signals and applies this signal to the difference, I.F. amplifier to control its gain. The sum I.F. amplifier has a conventional A.G.C. system for gain control. The control signal generated by this conventional A.G.C. system is also applied to a circuit for controlling the signal level of the I.F. pilot signal so it is inversely proportional to the signal gain level of the sum I.F. amplifier. This controlled I.F. pilot signal is then applied to the sum and difference I.F. amplifiers (as stated above) via a hybrid network and directional couplers, at a time chosen so that it does not interfere with the predicted echo-return.

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