Raytheon Company

Paul E Doucette

James R Toplicar

Gary A Frazier

Roger Mitsuo Ikeda

Krishna K Agarwal

Mark B Yeary

Guillermo V Andrews

Eleanor Foltz

The disclosed approach provides a low-cost approach by employing a single channel receiver for a direction-finding missile, rather than a conventional four-channel system. It employs interferometry techniques. The proposed approach leverages orthogonal waveforms and pseudorandom noise (PN) codes. This is a low-cost approach for a single channel direction finding system by leveraging orthogonal waveforms and interferometric techniques.

Single channel semi-active radar seeker

An antenna system (), includes a plurality of antenna elements (). Respective analog signals corresponding to respective antenna elements are subjected to respective phase shifts, are digitized using one-bit samples, are then subjected to an equal and opposite phase shift, and are subsequently combined so that the fundamental components add coherently and the harmonic components add noncoherently. A digital-to-analog converter is supplied with successive samples, and produces in response to each sample a pulse having a duration which is less than the time period between successive samples.

Method and apparatus for processing signals in an array antenna system

A digital phased array antenna comprises a plurality of antenna elements, each element receiving an incoming signal. An analog-to-digital converter is coupled to at least one of the antenna elements to convert the incoming signal to a multi-bit digital signal. A demodulator or de-ramp circuit is coupled to the analog-to-digital converter to reduce the bandwidth of the multi-bit signal.

Method and apparatus for a digital phased array antenna

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Plano, TX, United States of America

Paul E Doucette