Electromagnetic wave reflective type, low cost, active proximity sensor for harsh environments

Reference Number: N 04-01

Inventors: Cohen, Leonard D.; Weiner, Scott M.; Paczkowski, Henry C.; Zuercher, Joseph C.

USPTO Link: 5600253

Invention Summary

A low power, low cost, millimeter wave (MMW) proximity sensor that provides over a 6:1 increase in minimum detection range (55 mm minimum) compared to standard 18 mm inductive proximity sensors preferably includes a low cost MMW Gunn oscillator, MMW detector and analog processing/driver circuitry. The sensor is preferably designed for 3-wire operation and will fit in a standard 18 mm tube.