Abstract: An intrusion detection system that provides foliage penetration is disclosed employing an array of field disturbance transceivers operating at UHF frequencies. The array of transceivers generate a multiplicity of electromagnetic wave fields between nearby units and detect the presence of intruders by detecting disturbances in these fields. The emitted UHF signals used to generate the electromagnetic wave fields are also used to provide the communication link between transceivers in the array and to a control station. The control station facilitates the operation of the array from a remote monitoring site. A unique method of array deployment provides multiple opportunities to detect an intruder and secondarily provides redundant communication links in case of a sensor failure. Automatic means of setting detection thresholds based on environmental conditions assures a high probability of detection along with a low false alarm rate.

Abstract: An intrusion detection system that is capable of foliage penetration is disclosed employing an array of field disturbance transceivers operating at UHF frequencies. The array of transceivers generate a multiplicity of RF fields between nearby units and detect the presence of intruders by detecting disturbances in these fields. The emitted UHF signals used to generate the RF fields are also used to provide a communication link between transceivers in the array and to a control station. The control station facilitates the operation of the array from a remote monitoring site. A method of array deployment provides multiple opportunities to detect an intruder and secondarily provides redundant communication links in case of a sensor failure. Automatic means of setting detection thresholds based on environmental conditions assures a high probability of detection along with a low false alarm rate.