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Constant false alarm rate (CFAR) gain control device for a radar receiver
Constant false alarm rate (CFAR) gain control device for a radar receiver
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机译：用于雷达接收器的恒定误报率（CFAR）增益控制装置
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摘要
1. Gain control device of a radar reception chain which is constituted, on the input side, by a hyperfrequency amplifier circuit (5) for the signals received by the associated radar antenna (2) and, on the output side, by a filter circuit (15) for these signals, and which further comprises a mixer (10), an intermediate frequency stage and a radar signal processing chain, said device comprising a variable attenuation circuit (8) and a noise source (12) the noise level of which is adjusted by an auxiliary attenuation circuit (13), said device being characterized in that it comprises, as an attenuation circuit (8), a variable controlled reactance circuit placed on the output of the hyperfrequency amplifier circuit (5), an insulating input circuit (6) having a first path connected to the hyperfrequency amplifier (5), a second path closed by a load (7) and a third path connected to the input of the variable controlled reactance attenuation circuit (8) the output of which is connected to a first path of an output insulation circuit (9) which has a second path connected to the mixer (10) arriving at the intermediate frequency stage of the radar reception chain, and which has a third path connected to the auxiliary attenuation circuit (13).
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