A critical look at photonics for phased array systems

Summary form only given. It is noted that photonics has some advantages that assure it a place in array control. In digital control signal distribution and RF power distribution, one can expect to see early applications of photonic technology. Control signal distribution complicates present-day arrays, and is a relatively simple function to do photonically. RF signal distribution using photonics can, in principle, have the required accuracy, but losses in modulation and detection will require its use with solid-state modules. The cost and reduction in dynamic range may limit this application for some systems. The use of photonics to provide time delay has great potential for wideband arrays, but is not without competition from digital beamforming systems, and does not readily admit to adaptive control.<>