Microwave proximity sensor

Details Microwave proximity sensor Microwave proximity sensor

1982-07-26

1987-03-24

Blum, Theodore M.

Communications: electrical

Condition responsive indicating system

Specific condition

G08B 1318

Patent

active

046528644

ABSTRACT:
Microwave oscillator means wherein the resonant frequency determining element is a 1/2 or 1/4-wavelength folded dipole antenna that also serves as the transmitting and receiving antenna, capacitor means that is alternately charged and then discharged through said oscillator means until the voltage drops so low that oscillation ceases at which point the capacitor is charged again, negative peak follower means to convert the minimum voltage across the capacitor into a DC voltage, and comparator means to detect changes in the output voltage of the peak follower caused by the approach of a person or object to the 1/2 or 1/4-wavelength antenna.

REFERENCES:
patent: 4144529 (1979-03-01), Miller et al.
patent: 4366473 (1982-12-01), Inoue et al.
The A.R.R.L. Antenna Book, American Radio Relay League, 1960, 9th edition, pp. 113-115.

Affiliated with

Also associated with

Rating

Microwave proximity sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microwave proximity sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microwave proximity sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1356561