Iterative Calculation of Characteristic Modes Using Arbitrary Full-wave Solvers
arXiv:2209.00097 · doi:10.1109/LAWP.2022.3225706
Abstract
An iterative algorithm is adopted to construct approximate representations of matrices describing the scattering properties of arbitrary objects. The method is based on the implicit evaluation of scattering responses from iteratively generated excitations. The method does not require explicit knowledge of any system matrices (e.g., stiffness or impedance matrices) and is well-suited for use with matrix-free and iterative full-wave solvers, such as FDTD, FEM, and MLFMA. The proposed method allows for significant speed-up compared to the direct construction of a full transition matrix or scattering dyadic. The method is applied to the characteristic mode decomposition of arbitrarily shaped obstacles of arbitrary material distribution. Examples demonstrating the speed-up and complexity of the algorithm are studied with several commercial software packages.
5 pages, 2 figures, 2 algorithms
References in corpus (4)
- Unified Theory of Characteristic Modes: Part I -- Fundamentals
- Computational Aspects of Characteristic Mode Decomposition -- An Overview
- Characteristic Mode Decomposition Using the Scattering Dyadic in Arbitrary Full-Wave Solvers
- Unified Theory of Characteristic Modes: Part II -- Tracking, Losses, and FEM Evaluation