  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 intercore 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.
