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Phase-Locked Loops for Electronically Scanned Antenna Arrays

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4 Author(s)
Breese, M. ; Surface Armament Div., Sperry Gyroscope Co., Div., of Sperry Rand Corp., Great Neck, L. I., N. Y. ; Colbert, R. ; Rubin, W. ; Sferrazza, P.

This paper describes the ATHESA (Automatic THree-dimensional Electronic Scanned Array) technique for achieving very high antenna gain for deep-space communication systems. Phase coherence over a band of frequencies is established on reception automatically and continuously for either stationary or moving targets by phase-locking the signals from antenna elements separated by many wavelengths to a reference antenna element.

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Space Electronics and Telemetry, IRE Transactions on  (Volume:SET-7 ,  Issue: 4 )