Near field estimation of patch antennas from the fringing fields

Determination of far fields using magnetic line currents has been found to be accurate. However, this approach fails when near fields are determined. The magnetic line currents determined from the Eigen functions were earlier determined along the periphery of a patch antenna. This approach was found to be sufficiently accurate only for the far fields. The accuracy of the near fields using this approach is found to deviate when compared to the full-wave model. This problem is overcome by modelling the fringing fields and incorporating this to analytical approach by which the Eigen functions are determined. Accurate modelling of near fields is a must especially for determining the magnetic interactive currents for patch antenna arrays.