Analysis of electromagnetic waves scattering by a finite size dielectric and metal cylinder in a rectangular waveguide

The paper presents a rigorous solution of the scattering problem by a circu lar dielectric and perfectly conducting cylinders of any radius and any hei ght in the rectangular waveguide oriented perpendicularly to a wall. The me thod is based on the representation of fields in waveguide and dielectric m edium by cylindrical eigenfunctions and application of boundary conditions on surfaces of the cylinder to evaluate the fields inside and outside the c ylinder. The reflection and transmission coefficients are expressed through the fields. As an example the reflection and transmission coefficients ver sus frequency for various dielectric and metallic cylinders are computed. T he comparison of numerical with experimental data is presented.