A recursive algorithm to compute the wave-scattering solution of a finite-strip array using an efficient plane-wave basis

A truncated, nonuniform, finite array of strips does not have a closed-form solution. Using translational symmetry, a recursive algorithm that calculates the scattering solution with N*(log N)*(log N) computational complexity is described. The current distribution for the Hz polarization shows small-length-scale oscillations not presented in the Ez polarization.