Raytheon Company

Steven L Kaufman

Jack E White

Kenneth William Brown

Lee M Savage

Keith C Smith

Carl O Jelinek

Vincent C Hougo

Daniel A Hanevich

Douglas E Fullmer

Fred Gallagher

David J Fairfield

A system for detecting explosive materials. The system includes radiated high power electromagnetic radiation at one or more frequencies in the millimeter wave spectrum or above to interact with a sample and be reflected therefrom. The system also includes at least one electromagnetic sensor to measure emissions at harmonic frequencies and characteristics unique to one or more explosive materials. The system also includes a processor to collate and maintain a lookup table to identify specific explosive material types.

Explosive material detection

Methods and apparatus to transmit a range of frequencies targeting a vehicle, monitoring performance of an engine of the vehicle, determining a first frequency in the range of frequencies that disrupts operation of the engine, and dwelling on the first frequency to disrupt the engine, reducing power and continuing to dwell at the first frequency to maintain disruption of the engine.

Methods and apparatus to disrupt the engine of a vehicle

An electronic circuit combines two or more individual wideband RF receivers or transceiver band circuits to produce a usable instantaneous bandwidth that is wider than the bandwidth of the individual band circuits. The electronic circuit overcomes the difficulties of combining bands to provide low signal distortion across the band edges and throughout the combined instantaneous bandwidth of the two or more individual band circuits. This electronic circuit utilizes an amplitude, time delay, and phase adjustment procedure that uses associated adjustable circuitry to eliminate misalignments between the two or more individual band circuits.

Band stitching electronic circuits and techniques

The present invention concerns methods and apparatus for implementing a true-time-delay wideband digital beamformer. In true-time-delay wideband digital beamformers of the present invention, improved control over beam properties formed by the combination of the beamformer and a multi-element antenna coupled to the beamformer is achieved through finer control of delays imparted to data signals. In beamformers of the present invention, data is delayed using a coarse control that provides a delay in whole increments of a clock cycle of a digital clock reference and a fine control that provides a delay corresponding to a fraction of a whole clock cycle of the digital clock reference. In the true time delay method of the present invention, transmission and reception across a wide frequency band is accommodated. In the true time delay method of the present invention, multiple simultaneous beams are formed independently, beam-to-beam, across a wide frequency band.

Methods and apparatus for implementing a wideband digital beamforming network

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Port Hueneme, CA, United States of America

Steven L Kaufman