multi-frequency and multi-layer frequency selective structure (FSS). The present paper is an
extension of the previously published work where it has been shown that the method is valid
for 'thin'and 'thick'FSS both for angles of incidence up to 60° and for any lattices and
potentially allows the synthesis of FSS by the optimisation of circuit parameters. Further
investigation has shown the methods validity for the analysis of complex FSS geometries …