ELECTRICALLY STEERABLE PHASED ARRAY ANTENNA SYSTEM

摘要

An electrically steerable phased array antenna system includes an array of antenna elements and a corporate feed network (100) having an inner region (156) for input of two input signals A and B. The corporate feed network (100) has two outer regions (152) and (160) generating vector combinations of respective input signals and other input signal fractions. Each outer region has a splitting and combining network (166A/166B) providing the vector combinations as signals to antenna elements connected predominantly peripherally to itself. Each splitting and combining network (166A/166B) has input signal connections (162) from the inner region (156) disposed peripherally of the corporate feed network (100). Each consists of splitters and adding/subtracting elements implemented as hybrid couplers some of which have re-entrant or meandered track sections. Hybrid meandered track sections have multiple widths for signal weighting. The corporate feed network (100) is configured to avoid track cross-overs.