Comment on 'Wavelength Controlled Photonic True Time Delay for Wide-Band Applications'

摘要

Recently, motivated by wide-band radio frequency antenna control applications, [1] proposed and demonstrated a wavelength controlled photonic true time delay (TTD) line based on a single thin-film wavelength-division multiplexer. Note that previously in 2000, the cited reference [2] also proposed and demonstrated (see [2, Fig. 14]) such a variable delay line. A more general reference that cites the early works of wavelength-sensitive TTD lines for antenna applications can be found in [3].