Patent ID: 6104346
Filing Date: 2000-08-15
Classification: G01S,H01Q

Abstract:
An antenna for determining two-dimensional angle-of-arrival of input signals, which comprises:a plurality of circular array interferometers for determining azimuth of the input signals, the plurality of circular array interferometers exhibiting azimuth constant-phase-difference contours on a projection of a direction hemisphere, the plurality of circular array interferometers generating output signals in response to the input signals, each of the plurality of circular array interferometers having an axis;a plurality of linear interferometers for determining elevation of the input signals, the plurality of linear interferometers exhibiting elevation constant-phase-difference contours on the projection of the direction hemisphere, the plurality of linear array interferometers generating output signals in response to the input signals, each of the plurality of linear interferometers having an axis, each of the axes of the plurality of circular array interferometers being substantially parallel to each of the axes of the plurality of linear interferometers, the azimuth constant-phase-difference contours being substantially orthogonal to the elevation constant-phase-difference contours.