An electrically steerable phased array antenna system includes an array of
antenna elements and a corporate feed network having an inner region for
input of two input signals A and B. The corporate feed network has two
outer regions and generating vector combinations of respective input
signals and other input signal fractions. Each outer region has a
splitting and combining network providing the vector combinations as
signals to antenna elements connected predominantly peripherally to
itself. Each splitting and combining network has input signal connections
from the inner region disposed peripherally of the corporate feed
network. 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 is configured to avoid track
cross-overs.