Deembedding and Optimization of a Decoupling Structure Using a Modal Coupling Matrix

authored by: Leonardo Mörlein, Philipp Karl Gentner, Dirk Manteuffel
Abstract: A workflow to optimize a decoupling structure that is placed between the transmit and receive subarray of a mono-static sensing array is presented. A modal coupling model based on generalized scattering matrices in terms of characteristic modes is used to deembedd the decoupling elements from their environment. Based on this model, an iterative workflow for the optimization of the elements is derived. To represent the degrees of freedom during the design of the decoupling elements, the modal scattering behavior of the decoupling elements is synthetically modified in the model. The manopt toolbox is used to find the optimal configuration of the decoupling elements using an approximate model and full-wave simulations are only used sparingly to obtain accurate results, which reduces the simulation time to find optimal results. The finally obtained decoupling structure shows a reduction of the coupling by 17 dB.
Organisation(s): Institute of Microwave and Wireless Systems
External Organisation(s): Ericsson Antenna Systems Germany
Type: Conference contribution
Publication date: 30.03.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Computer Networks and Communications, Modelling and Simulation, Instrumentation, Radiation
Electronic version(s): https://doi.org/10.23919/EuCAP63536.2025.10999789 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{aa972592d1a844f2a49844a1ccd3b4e6,
title = "Deembedding and Optimization of a Decoupling Structure Using a Modal Coupling Matrix",
abstract = "A workflow to optimize a decoupling structure that is placed between the transmit and receive subarray of a mono-static sensing array is presented. A modal coupling model based on generalized scattering matrices in terms of characteristic modes is used to deembedd the decoupling elements from their environment. Based on this model, an iterative workflow for the optimization of the elements is derived. To represent the degrees of freedom during the design of the decoupling elements, the modal scattering behavior of the decoupling elements is synthetically modified in the model. The manopt toolbox is used to find the optimal configuration of the decoupling elements using an approximate model and full-wave simulations are only used sparingly to obtain accurate results, which reduces the simulation time to find optimal results. The finally obtained decoupling structure shows a reduction of the coupling by 17 dB.",
keywords = "characteristic mode analysis, Finite antenna arrays, generalized scattering matrices, modal coupling",
author = "Leonardo M{\"o}rlein and Gentner, {Philipp Karl} and Dirk Manteuffel",
note = "Publisher Copyright: {\textcopyright} 2025 European Association on Antennas and Propagation.; 19th European Conference on Antennas and Propagation, EuCAP 2025, EuCAP 2025 ; Conference date: 30-03-2025 Through 04-04-2025",
year = "2025",
month = mar,
day = "30",
doi = "10.23919/EuCAP63536.2025.10999789",
language = "English",
isbn = "979-8-3503-6632-7",
booktitle = "EuCAP 2025 - 19th European Conference on Antennas and Propagation",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
address = "United States",
}