A pseudoanalog true-time-delay (TTD) module based on substrate-guided waves and wavelength-division multiplexing is presented. A 1-to-32 (5-bit) even fan-out is demonstrated by use of a two-dimensional waveguide hologram array. This module has a packing density of 2.5 lines/cm<sup>2</sup> and very compact packaging (8 cm × 4 cm × 8 mm). It also reduces TTD system complexity by providing continuously tuned delay signals to parallel-control the whole phased-array antenna system. The device has a measured bandwidth of as high as 2.4 THz. The delay signal can range from tens of picoseconds to several nanoseconds.
© 1999 Optical Society of America
Zhenhai Fu, Charles Zhou, and Ray T. Chen, "Waveguide-Hologram-Based Wavelength-Multiplexed Pseudoanalog True-Time-Delay Module for Wideband Phased-Array Antennas," Appl. Opt. 38, 3053-3059 (1999)