Numerical Comparison of Interpolation Techniques for Phase Curve Reconstruction in Reflectarray Design

Phase curve is a key tool in the design of reflect array antennas. The full-wave evaluation of this parameter is in excellent agreement with measurements, but it is time consuming cause the repeated computation and subsequent resolution of the matrix linear system produced by discretization of the field equations. In order to save computational time, in this work we investigate the effectiveness and the performances of some interpolation techniques applied to the phase curve reconstruction process.