Patent ID: 6104343
Filing Date: 2000-08-15
Classification: H01Q

Abstract:
An array antenna system for forming multiple independently steered beams comprising:(a) an array of antenna elements;(b) a first plurality of series feed signal paths each of the first plurality of series feed signal paths having an input port coupled to an output port of one of the antenna elements;(c) a plurality of phase shifters each of said plurality of phase shifters having an input port and an output port;(d) a first plurality of couplers each of said first plurality of couplers disposed to couple a signal from a corresponding one of said first plurality of series feed signal paths to the inputs of corresponding ones of said plurality of phase shifters;(e) a second plurality of series feed signal paths;(f) a second plurality of couplers each of said couplers disposed to couple a signal from the output ports of the corresponding ones of said phase shifters to a corresponding one of said second plurality of series feed signal paths; and(g) a first signal combiner for combining the signals provided at the output ports of a corresponding one of said second plurality of series feed signal paths.