Research/Patents/US 5249162
US 5249162

RADIO FREQUENCY PHASE SENSITIVE WIRE DETECTOR

Assignee

Filed

Apr 20, 1973

Granted

Sep 28, 1993

Location

Abstract

An underwater object detection system and method are described which util 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.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Jan 7, 1982

Rescinded

Feb 24, 1993

Duration

11 years, 1 month

Inventor

  • 1JAMES L. KIRKLAND

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records