Monopulse radar with pilot signal generator
First Claim
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1. A monopulse radar for tracking a target, comprising:
- a. a tunable transmitting means for transmitting RF pulse signals toward the target;
b. a plurality of receiving channels for producing tracking error signals from target return signals;
c. a tunable pilot signal generator for injecting pilot signals representative of artifical target return signals into the receiving channels, said pilot signals having predefined phase and amplitude relationships;
d. means for correcting the tracking error signals in response to differences in the amplification and the phase shifts of the pilot signals injected into the individual receiving channels;
e. doppler frequency detecting means for detecting a target doppler frequency from the tracking error signals; and
f. a control circuit electrically-connected to the tunable pilot signal generator, to the tunable transmitting means, and to the doppler frequency detecting means for tuning the pilot signal frequency to the composite value of the transmitting frequency and the doppler frequency.
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Abstract
A monopulse radar comprising a pilot signal generator (20) for injecting phase and amplitude-defined pilot signals into the separate receiving channels (6-12, 3, 16-19) to obtain correction signals through the variation in the mutual phase and amplitude relationship between the separate receiving channels for correcting angle error signals derived from target return signals. The pilot signal generator (20) and the transmitter (1) are tunable and a control circuit is incorporated for adapting the pilot signal generator (20) relative to the frequency of the target return signals.
24 Citations
10 Claims
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1. A monopulse radar for tracking a target, comprising:
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a. a tunable transmitting means for transmitting RF pulse signals toward the target; b. a plurality of receiving channels for producing tracking error signals from target return signals; c. a tunable pilot signal generator for injecting pilot signals representative of artifical target return signals into the receiving channels, said pilot signals having predefined phase and amplitude relationships; d. means for correcting the tracking error signals in response to differences in the amplification and the phase shifts of the pilot signals injected into the individual receiving channels; e. doppler frequency detecting means for detecting a target doppler frequency from the tracking error signals; and f. a control circuit electrically-connected to the tunable pilot signal generator, to the tunable transmitting means, and to the doppler frequency detecting means for tuning the pilot signal frequency to the composite value of the transmitting frequency and the doppler frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification