Reduced Kernel IE's for MEN Based Analysis of Multilayered FSS Structures
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Despite the fact that the general behavior of periodic structures has been investigated for many decades, the analysis and design of multilayered FSS's is still a very actual and complicated problem. This is especially true for stringent requirements, which rise for example when the FSS has to be integrated with a planar phased array. A MEN based approach has been developed to solve this specific kind of problems and successfully applied to a realistic design case [1]. The key innovative notion introduced by the MEN method is the formalization of the scattering problem through a set of Integral Equations (IE's) with reduced kernel and corresponding reduced Green's Function (GF). Originally, the pertinent Method of Moments (MoM) based IE's have been solved by expanding the unknowns in terms of sub-domain functions. However, when the frequency filtering performances required from the FSS include steep roll offs and wide scan angles, the number of accessible (interacting) modes to be included in the analysis grows and it turns out that, for expansions based on sub-domain functions, the MoM matrix tends to be ill conditioned. This specific behavior will be the subject of this contribution.
Topics
TNO Identifier
222922
Publisher
IEEE
Source title
Proceedings of the 2005 IEEE Antennas and Propagation Society International Symposium, 3-8 July 2005, Washington, DC, USA, vol.4A
Place of publication
Piscataway,NJ
Pages
388-391
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