Electromagnetic penetration through an aperture into a cavity is considered. The structure of interest comprises a slotted conducting plane backed by a semielliptical channel. Three independent integral equations are used to study the structure of interest,for which analytical expressions are derived in another paper involve summations of Mathieu functions. Numerical results from the analytical expressions for the electromagnetic fields are compared with those from integral equation methods for various cases excitation and isorefractive materials. The agreement is excellent in all cases.
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Erricolo et al. (2005) studied this question.
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