Patent ID: 9513361
Filing Date: 2016-12-06
CPC Classification: G01S,H01Q

Claim Text:
1. A system for determining a direction of arrival of a signal, comprising: a plurality of Balanced Antipodal Vivaldi Antenna (BAVA) elements, the plurality of BAVA elements structured in an array; an active dual polarization sub-array of the plurality of BAVA elements within the array, the active dual polarization sub-array including a first set of at least four BAVA elements oriented in a first polarization and a first set of at least four BAVA elements oriented in a second polarization, the second polarization being orthogonal to the first polarization, the first set of at least four BAVA elements oriented in the first polarization and the first set of at least four BAVA elements oriented in the second polarization being adjacent to each other; a plurality of guarded dual polarization sub-arrays of the plurality of BAVA elements within the array, each of the plurality of dual polarization sub-arrays including a second set of at least four BAVA elements oriented in the first polarization and a second set of at least four BAVA elements oriented in the second polarization, the second set of at least four BAVA elements oriented in the first polarization and the second set of at least four BAVA elements oriented in a second polarization being adjacent to each other, and each of the plurality of guarded dual polarization sub-arrays including a dual polarization sub-array and a BAVA guard element adjacent thereto; a combiner circuit of the first polarization configured for receiving an output from the BAVA elements oriented in the first polarization and combining the output to produce a combined signal of the first polarization; a combiner circuit of the second polarization configured for receiving an output from the BAVA elements oriented in the second polarization and combining the output to produce a combined signal of the second polarization; a processor configured for: