Influence of planar sampling techniques of near field magnitude-only data on predicting far field radiation of PCBs by Genetic Algorithms

Near field data planar sampling techniques, including plane coverage angle, data type and number of observation points, are investigated with respect to a Near Field-Far Field conversion. For a PCB with a loop above a finite ground plane, an equivalent set of dipoles are searched by Genetic Algorithms to approximate the near field data, and then predict the far field. Magnetic near field peak magnitudes are obtained by a Method-of-Moments simulation, and far field prediction is compared with simulated data.