An efficient technique for the analysis of large multilayer microstrip patch arrays

F. De Vita, P. De Vita, A. Di Maria, A. Freni

In this paper, we present an efficient technique based on the extension of the Adaptive Integral Method (AIM) that allows the full-wave analysis of large multilayer microstrip patch arrays. The array patches can have arbitrary shape and orientation and are modelled with sub-domain triangular basis functions. Vias, vertical strips, attachments, slots, can be also included in the analysis. The method makes use of a 2D-FTT/CG scheme, reducing the CPU time per iteration to O(N logN) and the memory requirement to O(N). In particular, the method is very effective for the analysis of large reflect arrays. The results obtained for a dual-polarization dual-coverage reflectarray, designed for space applications, having a linear dimension of about 40 wavelength will be also shown at conference time.