and imaginary part q u n respectively their values will be decided by a random decision method in step 2 when using the second adjustment method w u n is expressed by a polar coordinate w u n a u n e j u03c6 u n after next adjustment the w u 1 n can be expressed as formula 5 w u 1 n w u n u03b4 w u n a u n u03b4 a u n u2212 1 l a u e j u03c6 u n u2212 1 l u u03c6 u03b4 u03c6 u n 5 wherein u03b4a u n and u03b4 u03c6 u n are adjusting step lengths of the amplitude a u n and phase u03c6 u n respectively l a u and l u03c6 u decide adjusting direction of the amplitude a u n and phase u03c6 u n respectively their value will be decided by a random decision method in step 3 set a set of w in initial value w 0 n which satisfies limit condition 1 w n u2266 t n 1 2 the number of w 0 n relates to antenna units number n of the antenna array for those shut down antenna units their.