Efficient Analysis of Multilayer Microstrip Problems by Modified Fast Directional Multilever Algorithm
Keywords:
Modified fast directional multilevel algorithm, multilayer microstrip structures, Sparameters, transmission coefficientAbstract
Fast directional multilevel algorithm (FDMA) combined with quad-tree structure is presented for analyzing multilayer microstrip problems. This method is successfully applied to analyze scattering in free space and it is extended to solve multilayer mircrostrip problems in this paper. The quad-tree structure is employed for the layer containing the microstrip patch, and then the defined of far field for every observed group is modified. There is only Kernel evaluation in low rank representation so that the surface-wave is extracted for the far-field Green’s functions expansion when the dielectric substrate is thick or relative permittivity is large. The memory requirement and the CPU time per iteration of the multilayer microstrip structure is presented, which show the accuracy and efficiency of this method.
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