Antenna De-Embedding in FDTD Using Spherical Wave Functions by Exploiting Orthogonality
Abstract
De-embedding antennas from the channel using Spherical Wave Functions (SWF) is a useful method to reduce the numerical effort in the simulation of wearable antennas. In this paper an analytical solution to the De-embedding problem is presented in form of surface integrals. This new integral solution is helpful on a theoretical level to derive insights and is also well suited for implementation in Finite Difference Time Domain (FDTD) numerical software. The spherical wave function coefficients are calculated directly from near-field values. Furthermore, the presence of a near-field scatterer in the de-embedding problem is discussed on a theoretical level based on the Huygens Equivalence Theorem. This makes it possible to exploit the degrees of freedom in such a way that it is sufficient to only use out-going spherical wave functions and still obtain correct results.
Keywords
Cite
@article{arxiv.2111.02087,
title = {Antenna De-Embedding in FDTD Using Spherical Wave Functions by Exploiting Orthogonality},
author = {Leonardo Mörlein and Lukas Berkelmann and Dirk Manteuffel},
journal= {arXiv preprint arXiv:2111.02087},
year = {2021}
}
Comments
5 pages, 6 figures. Version as submitted to the paper deadline (+Copyright Statement). To be published in 2022 16th European Conference on Antennas and Propagation (EuCAP)