Far-field Reconstruction Above Perfectly Electrically Conducting Ground Planes Using Amplitude-Only Data

In this paper, we present a novel method that utilizes amplitude-only data of electric field over semi-closed surface for the reconstruction of the spherical electric field that represents radiation source or an antenna under test (AUT) in the near-field (NF) region above perfectly electrically conducting (PEC) plane. The electric field exploiting genetic algorithm(GA) for global optimization is originally derived from a random initial estimate of field distribution, the electric field will gradually approximate to the exact value during iterations. When GA reach the maximum number of iterations, then we can calculate the far-field (FF) by spherical near-filed to far-field (NF-FF) transformation. The simulated and numerical results are in good agreement with each other, which shows that this method is effective.