Accession Number : ADD007446

Title :   Multiple Channel Electronic Countermeasures Radar Receiver.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Phillips,Calvert F , Jr

Report Date : 29 Jul 1980

Pagination or Media Count : 5

Abstract : A multiple channel electronic countermeasures radar receiving system comprising: source means for supplying periodic echo pulses beat to the intermediate frequency of the system and combined with jamming noise of variable frequency distribution, first receiver means fed by said source means and having a predetermined bandwidth centered on the intermediate frequency for limiting sharply to a fairly constant level signals from said source means which exceed a given amplitude, second receiver means fed by said source means and tuned to said intermediate frequency for limiting according to a logarithmic expression signals from said source means which exceed said given amplitude, frequency selective means included in said first receiver means for generating a first voltage defining random noise distribution at frequencies extending over the range of said bandwidth and generating a second voltage defining random noise distribution at frequencies offset from said intermediate frequency by a predetermined amount, video utilization means, and gate means controlled by said frequency selective means for gating the output of said first receiver means to said video utilization means in response to said first voltage and gating the output of said second receiver means to said video utilization means in response to said second voltage. (Author)

Descriptors :   *Patents, *Radar antijamming, Radar receivers, Intermediate frequencies, Search radar, Bandpass filters

Subject Categories : Radar Countermeasures
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE