Optimised 2D multi-resolution method of moment for printed antenna array modelling

Modelling is presented of microstrip antenna arrays with an optimised 2D mu lti-resolution method of moment (MRMoM). A Chui-Haar 2D multi-resolution ba sis is used fur the expansion of surface currents, and a pseudo-Galerkin sc heme is introduced to speed up the algorithm. It is shown that, for large s tructures, the MRMoM generates sparse linear systems, which allows a signif icant reduction of CPU time and memory storage. The optimisation of a physi cal a priori criterion is presented. With this criterion, it is possible to predict which elements of the generalised impedance matrix can be neglecte d: thus for the first time the MoM matrix filling time is really reduced. T he fast wavelet transform is also exploited for the computation of the non- negligible matrix elements. Theoretical results involving microstrip antenn a arrays are presented and compared with experiments.