| 摘要 |
<p>PURPOSE:To suppress a near-by frequency interference wave while maintaining relationship in amplitude and phase among received channels by attenuating the received channels of a pulse radar below a reference value and then passing the channels through narrow-band filters. CONSTITUTION:The outputs of the wide-band amplifiers 1a and 1b of received channels are inputted to a maximum level detector 6 via level detectors 5a and 5b to detect the maximum values of the channels. Then, attenuating quantities necessary for returning to a reference level are detected by an attenuating quantity detector 7 and the attenuating quantities are set to variable attenuators 8a and 8b to attenuate the channels to the reference level. Then, the outputs of the attenuators 8a and 8b are suppressed with interference waves by narrow- band filters 3a and 3b and outputted from output terminals 4a and 4b, respectively. This structure enables the interference waves to be suppressed while maintaining relationship in the amplitude and the phase of the target signals of the channels.</p> |
