Simultaneous true-time-delay beam-forming for all angles of arrival in a phased array antenna

Robert T. Weverka; Robert F. Kalman; Kelvin H. Wagner

doi:10.1117/12.257234

5 November 1996 Simultaneous true-time-delay beam-forming for all angles of arrival in a phased array antenna

Robert T. Weverka, Robert F. Kalman, Kelvin H. Wagner

Proceedings Volume 2845, Radar Processing, Technology, and Applications; (1996) https://doi.org/10.1117/12.257234
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

Robert T. Weverka, Robert F. Kalman, and Kelvin H. Wagner "Simultaneous true-time-delay beam-forming for all angles of arrival in a phased array antenna", Proc. SPIE 2845, Radar Processing, Technology, and Applications, (5 November 1996); https://doi.org/10.1117/12.257234

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