A NOVEL TECHNIQUE FOR ANALYSIS OF ELECTROMAGNETIC SCATTERING FROM MICROSTRIP ANTENNAS OF ARBITRARY SHAPE

A new numerical procedure is developed for the solution of the electri c field integral equation (EFIE) for arbitrary-shaped microstrip struc tures. This approach is superior over conventional EFIE techniques par ticularly in the low-frequency region or where the structure to be ana lyzed is electrically small, A pair of new basis functions is presente d which are essential to the solution in the entire frequency range of interest, The new basis functions decompose the surface current densi ty into divergenceless and curl-free parts which essentially get decou pled at the very low end of the frequency spectrum. Typical numerical results are presented for certain examples to illustrate the differenc e in the results between the two methods.