Application of slow light linear delay to squint-free (true-time delay) steering of phased array radar antennae is discussed. Theoretical analysis is provided on true-time delay radar requirements, including delay precision, amplitude precision, and bandwidth. We also discuss an improvement to the slow light technique based on stimulated Brillouin scattering by using a Faraday rotator mirror that provides temporally stable, linear (with pump power) delay, applicable to practical implementations. Future directions are considered.
Bashkansky M., Dutton Z , Gulian A , Walker D., Fatemi F, Steiner, M., True-time delay steering of phased array radars using slow light. Advances in slow and fast light II (Eds.: Shahriar S.M., Hemmer P.R. and Lowell J.R. ): Proceedings of SPIE, vol. 7226, 2009, Article # 72260. https://doi.org/10.1117/12.816324
Society of Photo-optical Instrumentation Engineers (SPIE)