Accession Number : ADD014834

Title :   Semi-Automatic Direction Finding.

Descriptive Note : Patent, Filed 5 Dec 89, patented 8 Jan 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Huntley, William P ; Swanick, David J

Report Date : 08 Jan 1991

Pagination or Media Count : 6

Abstract : A receiver selects and amplitude demodulates an RF signal from one of a plurality of directional antennas. The demodulated signal is then delayed to put it in time synchronism with the same signal information from an omnidirectional antenna. A signal is then generated of the peak pulses of the demodulated signal when the pulses are in time synchronism with pulses from the omnidirectional antenna. A control indicator receives the peak pulses along with periscope bearing signals and ship's heading signals and gives an r, display of the amplitude of the RF signal selected from the directional antenna at the periscope true bearing angle.

Descriptors :   AMPLITUDE, BEARING(DIRECTION), CONTROL, DEMODULATION, DIRECTION FINDING, DIRECTIONAL ANTENNAS, DISPLAY SYSTEMS, INDICATORS, OMNIDIRECTIONAL ANTENNAS, PEAK VALUES, PERISCOPES, PULSES, RADIOFREQUENCY, SEMIAUTOMATIC, SIGNALS, SYNCHRONISM, TIME

Subject Categories : Direction Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE