a power divider for diving an input RF signal into M RF signals of equal power and phase;

M low power selectable phase shifters each for phase shifting one of said M RF signals;

M high power amplifiers each coupled to one of said phase shifters;

an M×N power distribution network having M input ports and plural N output ports, and wherein said M high power amplifiers are connected to a respective one of said M input ports of the distribution network; and

a controller to adjust the phase of the M phase shifters to selectively obtain a maximum output at a desired one of said plural N output ports and a null output at all other outputs of said plural N output ports.