Lockheed Martin Corporation

William M Heruska

Michael Uscinowicz

Fred Tanjutco

Gregory Alan Arlow

A transmitter includes an array antenna and a plurality of transmitter modules. Each transmitter module includes a phase-lock loop with a slipped-cycle counter for determining the number of cycles of slippage before locking. A source of frequency reference signals is coupled to the phase-lock loop of each module by a path of unknown length. The phase of the reference signals at each module is determined from the number of slipped cycles, and a phase or delay corrector is set to compensate for differences among the modules. The modules amplify the signals to be transmitted and apply the amplified signals to the antenna array by way of paths of controlled length.

Digital beamforming phased array

An open architecture design for a digital nearfield test system for nearfield testing of a phased array antenna allows the ability to use the components of an individual phased array antenna to be tested in conjunction with a nearfield scanner probe system allowing an efficient and cost-saving 'radar testing the radar' scenario.

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Sicklerville, NJ, United States of America

William M Heruska