Abstract
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/cm2 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
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