Accession Number : ADD004848

Title :   Adaptive Direction of Arrival Antennae System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Coleman,Ernest W

Report Date : 08 Nov 1977

Pagination or Media Count : 18

Abstract : A system for adaptively determining the direction of arrival (DOA) of a linearly polarized RF signal. Three antennae are positioned at fixed distances from one another in a right triangle configuration to receive the RF signal. The antennae are alternatingly switched into two orthogonally aligned pairs and each pair exhibits an antenna pattern null which is adaptively steered toward the RF signal by a computer program operatively connected to a variable phase shifter which selectively alters the phase of the received signal. An algorithm within the program calculates the direction of arrival of the signal relative to a selected one of the antenna pair axes. (Author)

Descriptors :   *Patents, *Directional antennas, *Antenna arrays, Polarization, Phase shift circuits

Subject Categories : Electrical and Electronic Equipment
      Direction Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE