Sparse Source Model for Prediction of Radiations by Transmission Lines on a Ground Plane Using a Small Number of Near-Field Samples

Transmission lines (TLs) on a ground plane are one of the main radiators in printed circuit boards. This letter presents a sparse source model to predict radiation of the TLs on a ground plane. Because the current sources distribute sparsely or coherently in space, a sparse source model is developed so that the equivalent radiation sources can be reconstructed by using a small number of near-field samples scanned. Numerical results are presented to demonstrate the effectiveness and the advantages of the proposed method: the number of the scanned field samples can be reduced significantly in comparison with the conventional method.