Analysis of Thin Truncated Cylinder Scatterers Using Incomplete Hankel Functions and Surface Impedance Boundary Conditions
| Autor: | Antonio Faraone, Orlandino Testa, Valentina Cicchetti, Renato Cicchetti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
dielectric cylinders
electrical field integral equations electromagnetic scattering IHFs approximants impedance boundary conditions incomplete Hankel functions point-matching method of moments thin wire approximation General Computer Science Plane wave Basis function Dielectric Method of moments (statistics) Curvature 01 natural sciences Dielectric cylinders Cylinder General Materials Science Boundary value problem 0101 mathematics Physics 010102 general mathematics Mathematical analysis General Engineering Integral equation lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:TK1-9971 |
| Zdroj: | IEEE Access, Vol 8, Pp 72997-73004 (2020) |
| ISSN: | 2169-3536 |
| Popis: | The incomplete Hankel functions (IHFs) are employed to evaluate the scattered field from thin truncated cylinders excited by uniform plane waves or by arbitrarily oriented elemental current sources. Metallic and dielectric lossy structures are modeled by means of impedance boundary conditions (IBCs) including surface curvature effects. The scattering currents, expanded in triangular basis functions, are determined upon solving electrical field integral equations (EFIEs) by means of the point-matching method of moments (MoM). The scattered field is then expressed in closed analytical form in terms of IHFs, thus yielding highly accurate numerical results. Furthermore, accurate IHFs approximants are also derived to reduce the computational burden in the analysis of large electrical structures. The proposed approach is demonstrated in practical applications involving cylindrical dielectric structures used in planar lenses, lossy dielectric cylinders suitable to model cane-like vegetation, as well as polarization rotators featuring multiple stages composed of thin metallic wire arrays. |
| Databáze: | OpenAIRE |
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