Open AccessInterpolation strategy for broadband evaluation of characteristic modes
Author(s) -
Su Donglin,
Yang Zhao,
Wu Qi
Publication year - 2018
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2017.0523
Subject(s) - interpolation (computer graphics) , broadband , computer science , electronic engineering , acoustics , telecommunications , physics , engineering , frame (networking)
An interpolation algorithm of the eigenvalues and eigencurrents (eigenpairs) is proposed in this study to accelerate the broadband evaluation of characteristic modes. A bowtie antenna, an aircraft and a spherical shell are selected for numerical verification. To improve the stability and accuracy of the interpolation algorithm, a sampling scheme integrating non‐uniform frequency step (NUFS) into adaptive mode tracking is adopted. For comparison, the same problems are computed also by the method of moments (MoM) and a uniform frequency step (UFS) interpolation scheme. It is found that the interpolated eigenvalues and eigenpatterns by the NUFS scheme are very close to those by MoM while the ones by the UFS scheme yield larger deviations. The peak memory and computation time have been also studied. Compared with the computation by MoM, the memory consumed by the interpolation with NUFS is less and up to 80% of the computational time can be saved.