Phased array antenna system with two dimensional scanning

1,1 12,12 1 12 1,1 12,12 1,1 12,12 1 CD12CD 1EF12EF CD EF1 EF CD EF CD EF A phased array antenna system with two dimensional scanning includes a two dimensional array A of antenna elements Ato Aarranged in lines; each line is associated with a respective first rank corporate feed network to having outputs to connected to respective antenna elements Ato Aand inputs for variable relative phase input signals. These corporate feed networks each have first and second inputs A/B to A/B connected respectively to outputs to of different second rank corporate feed networks and . The corporate feed networks to convert input signals of variable relative phase into relatively greater numbers of output signals for a phased array. The system includes a phase varying circuit for varying phase differences between input signals to each second rank corporate feed network or and between input signals to different second rank corporate feed networks and to provide control of antenna beam direction in two dimensions.