EM wave diffraction on bivariate periodical waveguide dielectric antenna array radiation elements

The EM wave diffraction problem on bivariate periodical waveguide dielectric radiation elements antenna array is solved with the strict settings. Radiation elements include stepped and gradual nonhomogeneous transitions in waveguides and Floquet channels. Trefftz´s method and finite-element method combination was used at the EM models. Efficiency of such combination is confirmed by comparing of the accounting and experimental results.