Patent ID: 8401488

Claim:
A directional-sensing electromagnetic radiation detection device comprising: a plurality of sector antenna/detector units, each of said sector antenna/detector units comprising: a directional antenna element having a beam-width of approximately 90 degrees, and an envelope detector structured to detect electromagnetic radiation signals, wherein a first sector antenna/detector unit and a second sector antenna/detector unit of said sector antenna/detector units are situated along a first axis in substantially a same plane, wherein a maximum sensitivity direction of each of said first and second sector antenna/detector units points away from each other along the first axis, wherein a third sector antenna/detector unit and a fourth sector antenna/detector unit of said sector antenna/detector units are situated along a second axis in substantially said same plane, wherein a maximum sensitivity direction of each of said third and fourth sector antenna/detector units points away from each other along the second axis, and wherein the second axis is substantially perpendicular to the first axis; and a controller structured to receive the detected electromagnetic radiation signals from each of the first, second, third and fourth sector antenna/detector units, sum the received detected electromagnetic radiation signals from the first and second sector antenna/detector units to obtain a first vector sum, sum the received detected electromagnetic radiation signals from the third and fourth sector antenna/detector units to obtain a second vector sum, and sum the first and second vector sums to obtain a net azimuth bearing of an emission source of the electromagnetic radiation signals.