Title :
True time-delay scheme for feeding optically controlled phased-array antennas using chirped-fiber gratings
Author :
Corral, J.L. ; Marti, J. ; Fuster, J.M. ; Laming, R.I.
Author_Institution :
ETSI Telecommunicacion, Univ. Politecnica de Valencia, Spain
Abstract :
A novel approach of true-time delay (TTD) optical feeder for phased-array antennas is proposed and demonstrated. A compact size continuously variable TTD is achieved by employing tunable lasers and one wide bandwidth chirped-fiber grating as dispersive element. A high-resolution performance (5.3 ps) is obtained for a 26-GHz phased-array antenna employing narrow tuning bandwidth lasers with a wavelength stability of 0.005 nm and a 4 nm bandwidth chirped grating.
Keywords :
antenna phased arrays; chirp modulation; delays; diffraction gratings; high-speed optical techniques; laser stability; laser tuning; optical fibres; optical modulation; optical resolving power; 2 to 6 GHz; 5.3 ps; GHz phased-array antenna; bandwidth chirped grating; chirped-fiber gratings; compact size; continuously variable; dispersive element; high-resolution performance; narrow tuning bandwidth lasers; optically controlled phased-array antennas; phased-array antennas; true time-delay scheme; true-time delay optical feeder; tunable lasers; wavelength stability; wide bandwidth chirped-fiber grating; Antenna feeds; Bandwidth; Chirp; Delay; Gratings; Laser stability; Laser tuning; Optical control; Optical variables control; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
