A GTD Analysis of discontinuities in rectangular waveguides

The problem of the junction between two rectangular waveguides is examined. by ray methods. Results are presented taking into account only a first order approximation (singly diffracted rays)

Physical and Spectral Analysis of a Semi-Infinite Grounded Slab Illuminated by Plane Waves

In this article, we study the scattering problem of a truncated grounded slab illuminated by an arbitrarily incident Ez -polarized plane wave. We present a solution using the novel semianalytical spectral method based on an original extension of the Wiener–Hopf (WH) technique that uses the concept of characteristic Green’s function and the Fredholm factorization technique. The combination of these mathematical tools allows to extend the capabilities of classical WH method to a new set of problems. One of the main benefits of the proposed semianalytical solution is that it allows the computation of field components similar to what is done with closed-form spectral solutions when available. Physical phenomena, such as the reflection, diffraction, and excitation of surface/leaky waves, are reported. Numerical results validate the proposed methodology

Scattering at a Junction of Two Waveguides with Different Surface Impedances

In the above paper, a criterion has been given in order to establish if the scattering problem of the junction between two waveguides with different surface impedances can be solved in closed form. In this comment, a different approach, based on a spectral formulation, shows that the possibility to obtain analytical expressions of the scattering coefficients depends on the form of the relevant Wiener-Hopf equation

Scattering from finite extent frequency selective surface illuminated by arbitrary sources

A method is proposed for the computation of the field scattered from a dichroic plate placed in the near-field region of the feeds. The primary pattern of the feed and dichroic plate assembly has been computed