True-time-delay optical driving system for phased array antenna beamformers using a single chirped fiber Bragg grating

  • Authors:

  • A. Koumasis;P. Kostarakis

  • Affiliations:

  • Physics Department, Electronics-Telecom Lab, Ioannina University, Greece;Physics Department, Electronics-Telecom Lab, Ioannina University, Greece

  • Venue:
  • WAMUS'05 Proceedings of the 5th WSEAS International Conference on Wavelet Analysis and Multirate Systems
  • Year:
  • 2005

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Abstract

In this paper, a new five-element true-time-delay system is presented. To achieve the time delays needed for beamforming, a single chirped fiber grating delay line is used. The chirped fiber grating reflects different optical wavelengths driven into it at different times. These time differences constitute the necessary conditions for the beamforming. The different wavelengths are captured by tunable optical filters. All components of the system are commercially available. The angle resolution obtained is less than five degrees for a beam range of 180°. The system avoids any special dedicated optical structure or any micro-instrumentation set up for chirped fiber grating tuning or any synchronal tuning control of the tunable light (laser) source and the tunable filters.