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Photonic True-Time Delay Beamforming Based on Polarization-Domain Interferometers

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3 Author(s)
Drummond, M.V. ; Inst. de Telecomun., Univ. de Aveiro, Aveiro, Portugal ; Monteiro, P.P. ; Nogueira, R.N.

In this paper, we propose a novel photonic true-time delay beamforming system for phased array antennas. The system relies on tunable delay lines which are based on Mach-Zehnder delay interferometers (MZDIs) with tunable coupling ratio. As the MZDIs are implemented on the polarization domain, a single optical source and a single piece of polarization maintaining fiber are required. The proposed implementation is theoretically assessed and beam squinting is investigated by simulation. A proof-of-concept experiment that validates the operation principle of the proposed delay lines is presented.

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Lightwave Technology, Journal of  (Volume:28 ,  Issue: 17 )