The need for a low cost medium range proximity sensor for use in mechatroni
c products is identified and discussed with particular reference to automot
ive applications. One candidate solution to this need, a 27 GHz frequency m
odulated continuous wave radar system, is presented for use as a range find
er. The method of releasing the range information from the returned signal
is described together with the results from off-line data analysis. A real-
time system for implementation in a typical product is outlined. (C) 2000 E
lsevier Science Ltd. All rights reserved.