Circuit for detecting and homing on continuous wave radar targets

In an improved circuit for detecting and homing on continuous wave radar targets with a monopulse seeker, the combination comprising:

• (a) first, second, and third input terminals for receiving respectively, reference signal, .SIGMA., pitch difference signal, .DELTA.p, and yaw difference signal .DELTA.y,
• (b) a sawtooth wave generator circuit for generating a sawtooth wave signal,
• (c) local oscillator circuit means coupled to said sawtooth wave generator and producing an output signal varying linearly in frequency,
• (d) first, second, and third mixer circuits respectively, each having a first input coupled respectively to said first, second, and third input terminals and having a second input coupled to said local oscillator for producing output IF signals,
• (e) a summing circuit coupled to the outputs of said first, second, and third mixer circuits for producing a sum signal, .SIGMA., a sum signal .+-. pitch differential signal, .SIGMA..+-..DELTA.p, and a sum signal .+-. yaw difference signal, .SIGMA..+-..DELTA.y, signals,
• (f) a combining circuit having first, second, and third inputs and an output,
• (g) circuit means coupling said .SIGMA. signal directly to the first input of said combining circuit,
• (h) a first delay line coupling said .SIGMA..+-..DELTA.p signal to the second input of said combining circuit,
• (i) a second delay line having a delay longer than the delay of said first delay line coupling said .SIGMA..+-..DELTA.y signal to the third input of said combining circuit,
• (j) a dispersive delay line coupled to the output of said combining circuit for compressing the three frequency swept signals into a series of three narrow pulses with the second and third pulses delayed from the first pulses respectfully by the amount of the delays of said first and second delay lines.