Normalized total field of Phased-Array with Butler-Matrix

•Normalized total field of phased array with beams formed by Butler Matrix, i.e.
–Em(r) = {sin(N/2)[(2pd/l)sinr- (2m+1)](p/N)]} / Nsin(1/2)[(2pd/l)sinr- (2m+1)](p/N)], if elevation n = 0, where r = azimuth and m = the serial no. of the beam