ANALYSIS OF SCATTERING FROM CYLINDERS WITH A PERIODICALLY CORRUGATED PERIPHERY USING A CURRENT-MODEL TECHNIQUE

A novel solution is presented for the problem of two-dimensional elect romagnetic scattering from a circular cylinder with periodically corru gated circumference. The application of the Floquet formalism is effec ted by representing the incident field as a sum of fields, each one ob eying a Floquet periodicity condition involving a different phase fact or. Respective sets of fictitious sources, comprising rotationally per iodic and properly phase-modulated electric current distributions, are used to simulate the scattered field and the field in the cylinder re gion Spectral and spatial formulations are presented. The solution pro cedure is simple to implement and is applicable to cylinders with corr ugations of arbitrary profile. The accuracy of the method has been dem onstrated. It has also been shown that in the limiting case of low cor rugation the results of our numerical solution agree with results obta ined by an approximate analytic solution.