MICROWAVE PROXIMITY SENSOR
Assignee
Filed
Jul 26, 1982
Granted
Mar 24, 1987
Location
PORTOLA VALLEY CA US
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.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Nov 29, 1982
Rescinded
Nov 14, 1985
Duration
2 years, 11 months
Inventor
- 1NOEL M. CALVIN
Record Details
- Patent number
- US 4652864
- Application
- 06401925
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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