Patent ID: 6950064
Filing Date: 2005-09-27
Classification: G01S,H01Q

Abstract:
1. A system for ascertaining angle of arrival of an electromagnetic signal; said electromagnetic signal having at least one signal characteristic; said at least one signal characteristic indicating a first state or a second state; the system comprising: (a) a plurality of n antenna elements intersecting a common axis and cooperating to establish 2n sectors; each respective sector of said 2n sectors being defined by two said antenna elements of said plurality of n antenna elements and said axis; said signal characteristic indicating said first state on a first side of each respective antenna element of said n antenna elements and indicating said second state on a second side of each said respective antenna element; combinations of said signal characteristics in each said respective sector uniquely identifying said respective sector; and (b) an evaluation apparatus coupled with at least two antenna elements of said plurality of n antenna elements; said evaluation apparatus employing said state of said signal characteristic sensed by each of said at least two antenna elements to effect said ascertaining angle of arrival to a resolution of at least one said respective sector.