Antenna De-Embedding in FDTD Using Spherical Wave Functions by Exploiting Orthogonality

authored by: Leonardo Mörlein, Lukas Berkelmann, Dirk Manteuffel
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 deembedding 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.
Organisation(s): Institute of Microwave and Wireless Systems
Type: Conference contribution
Publication date: 2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Instrumentation, Radiation, Computer Networks and Communications
Electronic version(s): https://doi.org/10.48550/arXiv.2111.02087 (Access: Open)
https://doi.org/10.23919/EuCAP53622.2022.9769333 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{f242172c1c0047a0af0b1a648dcde08a,
title = "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 deembedding 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 = "Antenna De-embedding, FDTD method, Field Decomposition, Orthogonality, Spherical Wave Functions",
author = "Leonardo M{\"o}rlein and Lukas Berkelmann and Dirk Manteuffel",
year = "2022",
doi = "10.48550/arXiv.2111.02087",
language = "English",
isbn = "978-1-6654-1604-7",
booktitle = "2022 16th European Conference on Antennas and Propagation (EuCAP)",
publisher = "IEEE Computer Society",
address = "United States",
note = "16th European Conference on Antennas and Propagation, EuCAP 2022 ; Conference date: 27-03-2022 Through 01-04-2022",
}