PRECISE PHASE CONTROL METHOD FOR PHASED ARRAY ANTENNA

摘要

PURPOSE: A precise phase control method is provided to precisely control a beam steering angle by using a phase shifter having small number of phase control bits. CONSTITUTION: A precise phase control method comprises a first step of taking, as an input, a predetermined beam steering angle, and checking whether it is possible to perform a beam steering; a second step of calculating beam directions by dividing a beam if it is not possible to perform a beam steering; a third step of calculating intensities of beams with respect to the beam directions calculated in the second step; a fourth step of allocating phase shifters(240,250) of a phased array antenna with respect to the beam directions; and a fifth step of calculating phase differences between adjacent radiating elements(220,230) of the phased array antenna, and controlling phase shifters of beams by inputting phase values to the phase shifters allocated in the fourth step.