Title: Monopulse receiver circuit for an anti-radar missile tracking system

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Abstract: 1. In a monopulse radar receiver system for determining the angular co-orates of a pulsed RF radiation source, the combination comprising: An RF signal processing circuit adapted to convert a directional antenna input signals to inversely related pairs of computer input pulses; A pair of automatic gain control pre-amplifiers connected to said processing circuit adapted to simultaneously receive and amplify the pairs of input signals; A difference circuit connected between the outputs of each pair of pre-amplifiers for providing a difference signal pulse; Amplifying means connected with said difference circuit for amplifying said difference signal pulse; A leading-edge gate circuit connected with said amplifying means, adapted to be operatively triggered at the pulse-repetition rate of the pulses propagated by the RF radiation source for accepting only the leading edge of each amplified difference signal pulse; Means for triggering the gate circuit; A pulse integrator circuit connected with the output of said gate circuit adapted to provide an output signal which is a function of the position of the source of radiation; Direct connecting means joining the output of said integrator with one pre-amplifier of said pair for directing the integrator output signal to the one pre-amplifier for dirving the gain thereof in a first direction; An inverter circuit connecting the output of said integrator with the other pre-amplifier of said pair, adapted to invert and combine a reference voltage with the output of said integrator circuit to provide an inverted gain control signal having a reference imposed thereon for driving the gain of the other pre-amplifier in a second direction opposed to said first direction; and A second difference circuit connected with the output of said integrator and the output of said inverter circuit for deriving a difference signal indicative of the angular co-ordinate of the source of pulsed RF radiation, relative to said system, when the difference signal is driven to a zero valve.


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