Digital phase shifter

akk k Digital phase shifter, comprising series connection of controlled phase shifting bits (-), each of them inserts determinate amount of phase delay of the passing signal, wherein the phase change occur in response to the control signal switching the phase cells and applied to its steering terminal for a switching element of each of the cells characterized in applying as a switching element the discrete p-HEMT (pseudomorphic high electron mobility transistors) with positive or negative pinch-off voltage.