Direction finding system device and method

Abstract

The invention relates to a method for determining by a direction finder (DF) the direction to a Target, which comprises (a) providing an antenna at the DF, and an array of antennas at the Target; (b) providing a compass at each of the DF and the Target, for determining the azimuth of the DF Heading and of the Target Heading, respectively, with respect to the North; (c) providing at the DF a look-up table which describes n antenna patterns, one per Transmission Mode that may be used respectively at the Target; (d) sequentially performing x Transmission Modes from the Target, each time using another pair of antennas, and during each of the Transmission Modes intentionally, and in a controlled manner attenuating a reception signal at the DF until a loss of communication, and recording the respective attenuation levels; (e) based on the x recorded attenuations levels and the look up table, determining by the DF the direction from the Target to the DF; and (f) receiving at the DF the azimuth of the Target, and based on (i) the determined direction from the Target to the DF (ii) azimuth of the Target; and (iii) azimuth of the DF; calculating by the DF the direction from the DF to the Target.

Dependencies are inferred from the claim text.