Accession Number : ADD015546

Title :   Method and Apparatus for Passive Direction Finding with Sideband Determination.

Descriptive Note : Patent, Filed 15 Jul 91, patented 15 Sep 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Beyer, Ralph K ; Hunt, Robert E

Report Date : 15 Sep 1992

Pagination or Media Count : 6

Abstract : A method and apparatus are provided for passive direction finding that determines the sideband and angle of arrival of an incoming radio signal. A four-channel superheterodyne receiver generates quadrature between the radio signals received by each channel. Four inphase/quadrature phase detectors are connected to the receiver for generating inphase and quadrature components of the electrical phase differences between antenna elements of the receiver. The inphase and quadrature components are used for sideband determination and the electrical phase differences are used to derive the angle of arrival.

Descriptors :   *DIRECTION FINDING, *PATENTS, ANGLE OF ARRIVAL, ANTENNAS, ARRIVAL, CHANNELS, DETERMINATION, PHASE DETECTORS, RADIO EQUIPMENT, RADIO SIGNALS, RECEIVERS, SIDEBANDS, SIGNALS, SUPERHETERODYNE RECEIVERS

Subject Categories : Target Direction, Range and Position Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE