Hybrid Finite-Difference/Mode-Matching Method for Analysis of Scattering From Arbitrary Configuration of Rotationally-Symmetrical Posts

Abstract

Abstract-In this paper, the hybrid approach to the analysis of electromagnetic wave scattering from arbitrary configuration of bodyof-revolution (BOR) posts is presented. The proposed approach is based on the representation of each scatterer or set of scatterers by an effective sphere with the known boundary conditions defined by transmission matrix. In the analysis of each single axiallysymmetrical post with irregular shape we utilize the finite-difference frequency-domain/mode-matching technique (FDFD/MM). Then the scattering parameters of investigated set of posts are obtained utilizing the analytical iterative scattering procedure (ISP). This work is an extension of our previously published results where the proposed technique was defined in cylindrical coordinates and was limited to configurations of infinitely long parallel cylinders with arbitrary crosssection. In this paper we extend this method by formulating it in spherical coordinates. This allows us to significantly increase the versatility of the developed approach and in result to include in the analysis the sets of arbitrary located and oriented rotationallysymmetrical posts. The accuracy and efficiency of the proposed technique are discussed. The presented numerical results are verified with the ones obtained from commercial software.

Electromagnetic Wave Scattering from Material Objects Using Hybrid Methods

“…Now, imposing the boundary continuity conditions between tangential 37 Electromagnetic Wave Scattering from Material Objects Using Hybrid Methods www.intechopen.com components of fields in the outer (defined by equations (4) and (5)) and inner region (defined by equations (29) and (30)) we are obtaining T-matrix of analyzed object. More detailed description of the hybrid FDFD-MM method formulated in cylindrical and spherical coordinates is presented in Kusiek & Mazur (2009;2010;2011).…”

Electromagnetic scattering from both finite semi-circular channels and bosses in a conducting plane: TM case

“…In this paper, we study how the incident wave interacts with both convex and concave surfaces of both finite semi-circular bosses and semi-circular channels in a conducting plane as shown in Figure 1. The problem in this form becomes more general than any other geometry treated before [17][18][19][20][21][22][23][24][25][26][27][28].…”

Hybrid technique for the analysis of circular waveguide junctions loaded with ferrite posts

“…In this paper, a hybrid technique, previously presented in [22,23], is developed for the analysis of circular waveguide structures containing an arbitrary configuration of ferrite posts. The proposed method is based on the combination of the finite-difference frequency-domain (FDFD) technique with the MM method.…”

“…The proposed method is based on the combination of the finite-difference frequency-domain (FDFD) technique with the MM method. In my approach each object/configuration of objects is enclosed by an artificial sphere with boundary conditions defined by a transmission matrix [23]. The transmission matrix relates the incident field to the scattered field at the outer area of the artificial sphere, and is determined with the use of the finite-difference technique.…”