Method of monopulse angle gating for computer

Claim 1

A monopulse angle-gated computer for determining the direction of an energy radiating source comprising: receiver means for generating beam pairs having principle axes located in intersecting orthogonal planes; a servo-mechanism associated with each of said beam pairs and receiving the output of said receiver means corresponding to a beam pair and producing an error function dependent upon the voltage difference of each individual beam pair, said servo-mechanism being adapted to determine the angle to said energy radiating source, a further servo-mechanism coupled to each of said firstmentioned servo-mechanisms for normalizing the source signal strength from the error function of said first-mentioned servomechanisms, summing means included in said further servo-mechanism adapted to receive an input corresponding to each of said individual beams and having an output, gating means operative to interrupt the flow of information through the first-mentioned servo-mechanisms, said gating means having a predetermined reference threshold level so that signals at a given level below a reference will not allow operation of the first-mentioned servo-mechanisms, upper intensity discrimination means adapted to be actuated when the input signal is greater than a given level above the reference, the upper intensity discrimination corresponds to angle-gating, said further servo-mechanisms incorporating amplitude discrimination means, the input to said amplitude discriminating means comprising the difference pulses from the first-mentioned servo-mechanisms and a summation pulse from said last mentioned servo-mechanisms, and said amplitude discriminator operating to compare each difference pulse with the summation pulse.