Cubic Defense Systems, Inc.

Composite Optics, Incorporated

Science and Applied Technology, Inc.

William F McNaul

Paul R Eberhardt

Michael L Tentler

Mark E Bonebright

Bernard Berkowitz

Rodney F Sinclair

John F Wittmond

William J Zimmer

Jon D Weatherington

Anthony S Rerecich

An apparatus and method for identifying sidelobe transmitted and/or received radar signals. The apparatus is utilized in a radar system having a transmitter for generating at least one detection signal, an antenna system defining a mainbeam and sidelobe radiation pattern for transmitting each detection signal and for receiving electromagnetic signals including echo signals each corresponding to a reflection from an object of a transmitted detection signal, and a receiver system for processing each received echo signal. The apparatus is embodied as a system for identifying each echo signal received upon the antenna system sidelobe and each received echo signal having a corresponding detection signal transmitted on the antenna system sidelobe. The system comprises a modulation system for modulating each sidelobe radiated detection signal and each sidelobe received echo signal; and a detector system for, receiving from the antenna system each echo signal, identifying each echo signal having the modulation and providing an indication signal for each echo signal having the modulation.

Radar sidelobe identification and discrimination system

A system for discriminating between signals received on the mainbeam of an antenna system and signals received on the sidelobe of the antenna system. The system utilizes a main antenna and multiple auxiliary antennas. The signals received on the main antenna are coincident on one or more of the auxiliary antennas. The auxillary antenna signals are multiplexed separated for single channel processing. The main antenna signal is compared with each of the multiplexed auxiliary antenna signals. The result of these comparisons are used to determine whether the signal received on the main antenna was received on a mainbeam or a sidelobe.

Sidelobe identification and discrimination system with signal

A system for correcting phase errors in a space based radar system utilizing probes located in front of an array of lens elements of a phased array antenna. Included is a mechanism for supplying a stored perfect value signal indicative of the distance between the probes and lens elements for a perfect, nondeformed array, and the mechanism for receiving radiated pilot signals to supply an actual value signal indicative of the actual distance between the probes and the lens elements to determine an amount of structural deformation. A mechanism is provided for measuring the difference in phase between the perfect value signal and the actual value signal to supply a deformation phase correction signal to adjust the beam steering command to correct for phase error introduced as a result of the measured structural deformation. Further disclosed is a system and method for effecting phase coherence across the array by utilizing a radiated reference pilot frequency pulse to each lens element. Any difference in phase between the measured reference pilot frequency pulse and a stored value is utilized to command a phase correction at each lens element utilizing a feedback loop for effecting phase coherence for the array, both on transmit as well as receive. Further disclosed is a method and system incorporating a digitally synthesized phase error correcting module with each lens element. In one embodiment, the correcting modules are dispersed among the lens elements utilizing an interpolation method for phase error correction.

Digitally synthesized phase error correcting system

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Ramona, CA, United States of America

William F McNaul