Array Synthesis in Terms of Characteristic Modes and Generalized Scattering Matrices

authored by: Leonardo Mörlein, Dirk Manteuffel
Abstract: The synthesis of antenna arrays in the presence of mutual coupling using generalized scattering matrices in terms of characteristic modes (CMs) is proposed. For the synthesis, the array is built of synthetic elements that are described by their modal scattering and radiation behavior. In particular, the question of how to describe the degrees of freedom of such elements is addressed. The eigenvalues of the CMs of the element geometry and the modal radiation behavior of the antenna are thereby selected as degrees of freedom for the model of synthetic elements. Using this model and a modal coupling matrix, an approach to optimize the modal configuration of the elements within an array is proposed. Finally, a close to reality example shows how the proposed theory can be used to enhance the cross-polarization rejection of a circularly polarized patch antenna array with a fixed beam.
Organisation(s): Institute of Microwave and Wireless Systems
Type: Article
Journal: IEEE Transactions on Antennas and Propagation
Volume: 73
Pages: 986 - 997
No. of pages: 12
ISSN: 0018-926X
Publication date: 02.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electrical and Electronic Engineering
Electronic version(s): https://doi.org/10.48550/arXiv.2403.02046 (Access: Open)
https://doi.org/10.1109/TAP.2024.3515285 (Access: Closed)

BibTeX

@article{b12a88391c1b4038aa173fc7c4589387,
title = "Array Synthesis in Terms of Characteristic Modes and Generalized Scattering Matrices",
abstract = "The synthesis of antenna arrays in the presence of mutual coupling using generalized scattering matrices in terms of characteristic modes (CMs) is proposed. For the synthesis, the array is built of synthetic elements that are described by their modal scattering and radiation behavior. In particular, the question of how to describe the degrees of freedom of such elements is addressed. The eigenvalues of the CMs of the element geometry and the modal radiation behavior of the antenna are thereby selected as degrees of freedom for the model of synthetic elements. Using this model and a modal coupling matrix, an approach to optimize the modal configuration of the elements within an array is proposed. Finally, a close to reality example shows how the proposed theory can be used to enhance the cross-polarization rejection of a circularly polarized patch antenna array with a fixed beam.",
keywords = "characteristic mode analysis, Finite antenna arrays, generalized scattering matrices, modal coupling, Characteristic mode (CM) analysis, finite antenna arrays",
author = "Leonardo M{\"o}rlein and Dirk Manteuffel",
note = "Publisher Copyright: {\textcopyright} 2024 IEEE.",
year = "2025",
month = feb,
doi = "10.48550/arXiv.2403.02046",
language = "English",
volume = "73",
pages = " 986 -- 997",
journal = "IEEE Transactions on Antennas and Propagation",
issn = "0018-926X",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2",
}