High order resonances and scattering from FSS tripole arrays

摘要: A theoretical model is outlined where the scattered field expanded in a set of plane waves called Floguet modes. An integral equation relating induced current on tripole elements to periodic nature boundary conditions for incident determined. Using an appropriate expansion method moments used along with Galerkin testing obtain modal coefficients field. Measured results are compared predicted three different grids tripoles. The transmission response these presented copolarised signals both parallel and perpendicular planes incidence over frequency range 7-20 GHz angles up 60 degrees . Both fundamental higher order resonances discussed.