Electromagnetic wave reflective type, low cost, active proximity

Details Electromagnetic wave reflective type, low cost, active proximity Electromagnetic wave reflective type, low cost, active proximity

1995-05-08

1997-02-04

O'Shea, Sandra L.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

342 27, G01R 2700

Patent

active

056002530

ABSTRACT:
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.

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patent: 5177445 (1993-01-01), Cross
patent: 5459405 (1995-10-01), Wolff et al.

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