V. G. Daniele

Learn More
The diffraction by impenetrable wedges having arbitrary aperture angle is studied by means of the Wiener-Hopf (W-H) technique. A system of functional equations called generalized Wiener-Hopf equations (GWHE) is obtained. Only for certain values of the aperture angle these equations are recognizable as standard or classical Wiener-Hopf equations (CWHE).(More)
A metallic cylindrical resonator partially filled with double-negative (DNG) metamaterial with sector shape is analyzed in the frequency domain. The remaining part of the resonator is filled by a double-positive (DPS) medium. The structure results in a cylindrical resonator of finite length with a metamaterial wedge whose edge is on the cylinder axis. A(More)
This paper deals with the problem of evaluating the electromagnetic field of a perfect electrical conductor (PEC) wedge over stratified media. The particular case wherein one face of the wedge is perpendicular to the direction of stratification has been previously considered and solved by using the generalized Wiener-Hopf technique [1]. In this paper the(More)
A circular cylindrical metallic resonator half filled with DPS material and half with DNG metamaterial is analyzed, in the frequency domain. The two materials are linear, lossless, homogeneous, and anti-isorefractive to each other. The electric field is assumed to be parallel to the cylinder axis. It is shown that the resonator performs independently of(More)
This paper deals with the problem of evaluating the electromagnetic field of a perfect electrical conducting (PEC) wedge over dielectric substrate. In this paper the directions of the two faces of the wedge are arbitrary. We formulate the problem in terms of generalized Wiener-Hopf equations (GWHE) and we propose a possible method of solution based on the(More)
In a recent work [1,2,3] this author showed that the diffraction by an impenetrable wedge having arbitrary aperture angle always reduces to a standard Wiener-Hopf factorization. However, he encountered some difficulties in ascertaining the coincidence of WienerHopf solutions with the ones obtained by the Malyuzhinets method. These difficulties are due to(More)
This paper reports the state of the art on the study of diffraction by a dielectric wedge and it proposes a new method to compute the diffracted field. In particular the paper presents the application of the Wiener-Hopf method to the problem of diffraction of a plane wave by a dielectric wedge immersed in free space. The formulation and the equations are(More)
In the problem of the two wedges, angular and planar regions are present. By resorting to the generalized Wiener Hopf technique, a circuital modelling is presented to represent these regions. This formulation yields integral equations in the spectral domain. Simple quadrature methods provide efficient numerical solutions. The validity of the proposed method(More)
This paper provides a semi analytical procedure to factorize the two dimensional kernel involved in the quarter plane diffraction problem. The proposed method is based on the reduction of the factorization problem to the solution of a Fredholm integral equation of second kind. The solution of the Fredholm integral equation appears cumbersome since it(More)
The diffraction of an arbitrary incident plane wave on two opposite PEC half-planes is formulated in terms of Wiener-Hopf equations. The factorization of the 4x4 matrix kernel is reduced to the factorization of a 2x2 matrix kernel. The factorization of the kernel is obtained by the solution of a Fredholm equation of second kind that provides very accurate(More)