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
      Underwater Ordnance
      Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE