| Full text | |
| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43212 - USA
[2] Ohio State Univ, Electrosci Lab, Columbus, OH 43212 - USA
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Journal of Computational Physics; v. 376, p. 249-275, JAN 1 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
We present a finite-element time-domain (FETD) Maxwell solver for the analysis of body-of-revolution (BOR) geometries based on discrete exterior calculus (DEC) of differential forms and transformation optics (TO) concepts. We explore TO principles to map the original 3-D BOR problem to a 2-D one in the meridian rho z-plane based on a Cartesian coordinate system where the cylindrical metric is fully embedded into the constitutive properties of an effective inhomogeneous and anisotropic medium that fills the domain. The proposed solver uses a (TE phi, TM phi) field decomposition and an appropriate set of DEC-based basis functions on an irregular grid discretizing the meridian plane. A symplectic time discretization based on a leap-frog scheme is applied to obtain the full-discrete marching-on-time algorithm. We validate the algorithm by comparing the numerical results against analytical solutions for resonant fields in cylindrical cavities and against pseudo-analytical solutions for fields radiated by cylindrically symmetric antennas in layered media. We also illustrate the application of the algorithm for a particle-in-cell (PIC) simulation of beam-wave interactions inside a high-power backward-wave oscillator. (C) 2018 Elsevier Inc. All rights reserved. (AU) | |
| FAPESP's process: | 15/50268-5 - Novel metamaterials for rf/microwave and optical applications |
| Grantee: | Ben-Hur Viana Borges |
| Support Opportunities: | Regular Research Grants |