Monopulse processing systems
First Claim
1. A secondary surveillance radar system in which one-half angle monopulse processing is used to obtain angle estimation of azimuth bearing, said system comprising:
- at least three channels, one of which is a sum channel, the second a difference channel, and the third an omni channel;
means for providing first and second signals of equal magnitude, but differing in phase, in the respective sum and difference channels, the first signal being ε
+jΔ
, the second signal being Δ
+jΣ
;
a log amplifier in each of the respective channels;
a monopulse processor;
two independent phase detectors for detecting said first and second signals in the respective sum and difference channels;
means for coupling the outputs of the respective phase detectors to said processor; and
means for coupling the outputs of said log amplifiers in said sum and difference channels to their respective phase detectors, whereby a resultant signal is obtained the magnitude of which gives target deviation in either direction from boresight based on the phase difference between said first and second signals.
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Abstract
A secondary surveillance radar system in which monopulse processing is used to obtain angle estimation of azimuth bearing, involving a monopulse processor, two independent phase detectors in respective A and B channels, the arrangement being such that a log amplifier is provided in each of the respective channels and the outputs of these log amplifiers are coupled to the independent phase detectors, whereby a resultant signal is obtained giving target deviation from boresight in either direction based on differences in phase between signals appearing in the respective channels.
25 Citations
6 Claims
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1. A secondary surveillance radar system in which one-half angle monopulse processing is used to obtain angle estimation of azimuth bearing, said system comprising:
-
at least three channels, one of which is a sum channel, the second a difference channel, and the third an omni channel; means for providing first and second signals of equal magnitude, but differing in phase, in the respective sum and difference channels, the first signal being ε
+jΔ
, the second signal being Δ
+jΣ
;a log amplifier in each of the respective channels; a monopulse processor; two independent phase detectors for detecting said first and second signals in the respective sum and difference channels; means for coupling the outputs of the respective phase detectors to said processor; and means for coupling the outputs of said log amplifiers in said sum and difference channels to their respective phase detectors, whereby a resultant signal is obtained the magnitude of which gives target deviation in either direction from boresight based on the phase difference between said first and second signals. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification