Tyco Electronics Corp. unveils its High Resolution Radar (HRR)
for the next generation of "Smart Bumpers."  Tyco says its
system offers significant advantages over ultrasonic sensing
systems, including greater range, higher resolution between
objects and important styling advantages.  HRR works by
transmitting a short pulse into a desired area. This energy is
reflected off objects within 66 ft. (20.1 m) and returns. The
travel time of the signal determines the range of the object.
The HRR system can "see through" plastic fascias commonly used
on vehicles, eliminating the need for stylists to contend with
unsightly external ultrasonic sensors.