Accession Number : ADD016070
Title : Radio Frequency Phase Sensitive Wire Detector.
Descriptive Note : Patent, filed 20 Apr 73, patented 28 Sep 93,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Kirkland, James L
Report Date : 28 Sep 1993
Pagination or Media Count : 7
Abstract : An underwater object detection system and method are described which utilize changing phase relationships between radio waves received by a moving underwater receiver, via a retransmitting underwater object, and radio waves received through air directly from a transmitter. The moving underwater receiver is characterized by an envelope or encapsulation of material of different radio wave propagation rate than that of the water medium, so that a markedly different phase change relation exists when the underwater receiver is in contact with the object.
Descriptors : *PATENTS, *MAGNETIC DETECTION, *MINE DETECTION, *UNDERWATER MINES, *ELECTROMAGNETIC RADIATION, *RADIO SIGNALS, ENCAPSULATION, RADIO EQUIPMENT, RADIO WAVES, TRANSMITTERS, UNDERWATER OBJECTS, WAVE PROPAGATION, RADIO RECEIVERS, RADIOFREQUENCY, LEAD WIRES, ELECTRICAL CONDUCTIVITY
Subject Categories : Magnetic & Electric Fld Detection & Detectors
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE