Accession Number : ADD005760

Title :   RF Loop Intruder Detection System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Rotman,Walter ; Poirier,J Leon ; Karas,Nicholas V ; Franchi,Peter R ; Fante,Ronald L

Report Date : 16 Jan 1979

Pagination or Media Count : 5

Abstract : An RF intruder system utilizes two concentric loops of wire spaced apart for a predetermined magnitude, either of which can transmit and/or receive electromagnetic energy. This area within the loops are to be protected against intrusion. Without intrusion, the received signal is steady. Upon intrusion, there are signal changes which are instantly noted by signal detection and processing. (Author)

Descriptors :   *Patents, *Intrusion detectors, *Radar, Personnel detectors, Loop antennas, Very high frequency, Electric cables, False alarms, Electromagnetic fields, Radio transmitters

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE