Non-uniform surface current distribution on parallel wire loop antennas using curved patches in the method of moments

The surface current components for two parallel loop antennas were investigated, for different operating frequencies and spacing distances. The modelling method used employed a two-dimensional electric surface patch integral-equation formulation, solved by independent piecewise-linear basis function methods in the circumferential and axial directions of the wire. The loops are each fed by simple axially-directed delta excitation sources. The object of this study was to obtain a deeper understanding of non-uniform current distributions and the way they influence losses.