CW converter circuit
First Claim
Patent Images
1. In an improved circuit for detecting and tracking continuous wave radar targets, the combination comprising:
- (a) antenna means for receiving continuous wave radar signals,(b) a sweep generator for generating a sawtooth wave signal,(c) local oscillator circuit means coupled to said sweep generator and producing an output signal varying linearly in frequency,(d) mixer circuit means coupled to said local oscillator circuit means and to said antenna means for producing an output IF signal that is a linearly frequency swept continuous wave,(e) a dispersive delay line coupled to said mixer circuit means for converting the swept frequency signal to a pulsed output signal,(f) detector circuit means coupled to the output of said dispersive delay line for providing video output pulses,(g) tracking circuit means coupled between said detector circuit means and said local oscillator for maintaining a target signal of a selected frequency at the output of said detector circuit means.
1 Assignment
0 Petitions
Accused Products
Abstract
A circuit for use in anti-radar missile seekers or radar counter-measure eivers to convert the signals received from continuous wave radars into pulse signals so that the signals may be more readily detected and can be processed in the same signal processing circuitry used against pulse radars. The received signal is mixed with a frequency swept local oscillator signal, fed to a dispersive delay line and then detected.
-
Citations
5 Claims
-
1. In an improved circuit for detecting and tracking continuous wave radar targets, the combination comprising:
-
(a) antenna means for receiving continuous wave radar signals, (b) a sweep generator for generating a sawtooth wave signal, (c) local oscillator circuit means coupled to said sweep generator and producing an output signal varying linearly in frequency, (d) mixer circuit means coupled to said local oscillator circuit means and to said antenna means for producing an output IF signal that is a linearly frequency swept continuous wave, (e) a dispersive delay line coupled to said mixer circuit means for converting the swept frequency signal to a pulsed output signal, (f) detector circuit means coupled to the output of said dispersive delay line for providing video output pulses, (g) tracking circuit means coupled between said detector circuit means and said local oscillator for maintaining a target signal of a selected frequency at the output of said detector circuit means. - View Dependent Claims (2, 3, 4)
-
-
5. In an improved circuit for detecting and tracking continuous wave radar targets, the combination comprising:
-
(a) a monopulse radar receiving antenna for receiving continuous wave radar signals, (b) a hybrid comparator coupled to said receiving antenna and providing sum and difference signal outputs, (c) a sweep generator for generating a sawtooth wave signal, (d) local oscillator circuit means coupled to said sweep generator and producing an output signal varying linearly in frequency, (e) a first mixer circuit means coupled to said local oscillator means and to the sum signal output of said comparator for producing a first IF signal that is a linearly frequency swept continuous wave, (f) a second mixer circuit means coupled to said local oscillator means and to the difference signal output of said comparator for producing a second IF signal that is a linearly swept continuous wave, (g) a summing network having a first input coupled to the output of said first mixer circuit means and a second input coupled to the output of said second mixer circuit means for providing an error signal, (h) a first dispersive delay line coupled to said first mixer circuit means and providing a pulsed output reference signal, (i) a second dispersive delay line coupled to said summing network and providing a pulsed output error signal.
-
Specification