TY - JOUR
TI - Compensation of Multicore Fiber Skew Effects for Radio over Fiber mmWave Antenna Beamforming
AU - Nikas, T.
AU - Pikasis, E.
AU - Karabetsos, S.
AU - Syvridis, D.
JO - Journal of Lightwave Technology
PY - 2020
VL - 38
TODO - 7
SP - 1644-1650
PB - Institute of Electrical and Electronics Engineers, Inc. (IEEE)
SN - 0733-8724, 1558-2213
TODO - 10.1109/JLT.2019.2961557
TODO - 5G mobile communication systems;  Antenna phased arrays;  Beam forming networks;  Beamforming;  Directional patterns (antenna);  Fibers;  Frequency response;  Millimeter waves;  Radio transmission, Differential delays;  Fiber architecture;  Mm-wave antennas;  Optical true time delay networks;  Phased array antennas;  Simulation analysis;  Skew distribution;  Transmission paths, Radio-over-fiber
TODO - In 5G networks, a Radio over Fiber architecture utilizing multicore fibers can be adopted for the transmission of mmwave signals feeding phased array antennas. The mmwave signals undergo phase shifts imposed by optical true time delay networks, to provide squint free beams. Multicore fibers are used to transfer the phase shifted optical signals. However, the inter-core static skew of these fibers, if not compensated, distorts the radiation pattern. We propose an efficient method to compensate the differential delays, without full equalization of the transmission path lengths, reducing the power loss and complexity. Statistical analysis shows that regardless of the skew distribution, the frequency response can be estimated with respect to the rms skew delays. Simulation analysis of the complete Radio over Fiber and RF link validates the method. © 1983-2012 IEEE.
ER -