Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1963-11-15
1980-07-29
Hubler, Malcolm F.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
G01S 736
Patent
active
042153441
ABSTRACT:
1. 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.
Hubler Malcolm F.
Pawlikowski Eugene J.
Rusz Joseph E.
The United States of America as represented by the Secretary of
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