Abstract
A multimode equivalent network representation (MEN) is proposed for the scattering from a multistrip grating. Previously, rigorous analytical results were developed involving gratings with one or two strips in a period. In the present paper, the MEN representation is extended to planar gratings with an arbitrary number of strips or apertures per unit cell. Both TE and TM incidence are described. The extension is obtained combining the MEN formulation with the method of moments solution (MoM) of the relevant integral equation. The code thus obtained retains the key feature of the MEN representation, namely the frequency independence of the characterization, and is much more flexible than the analytical solutions previously derived. The MoM solution procedure is described in detail and several application examples are discussed.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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