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Proceedings Paper

Simultaneous true-time-delay beam-forming for all angles of arrival in a phased array antenna
Author(s): Robert T. Weverka; Robert F. Kalman; Kelvin H. Wagner
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Paper Abstract

We present on the use of coherent optical beam combining and signal processing in a fiber-optic phased-array-antenna systems. Mutually coherent links lose phase registration after the signals propagate through the fiber path lengths subject to thermal and stress-induced variations. These path length changes can be compensated with phase corrections to the optical carrier in tan AM or PM modulated signal. In a true time delay fiber optical feed subsystem, the phase corrected outputs can be coherently combined to allow a lens to collect almost all the main beam energy into a single mode output, leading to substantially improved noise figure and dynamic range.

Paper Details

Date Published: 5 November 1996
PDF: 6 pages
Proc. SPIE 2845, Radar Processing, Technology, and Applications, (5 November 1996); doi: 10.1117/12.257234
Show Author Affiliations
Robert T. Weverka, Optivision (United States)
Robert F. Kalman, Optivision (United States)
Kelvin H. Wagner, Univ. of Colorado/Boulder (United States)

Published in SPIE Proceedings Vol. 2845:
Radar Processing, Technology, and Applications
William J. Miceli, Editor(s)

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