Upper Bounds and Design Guidelines for Realizing Uncorrelated Ports on Multimode Antennas Based on Symmetry Analysis of Characteristic Modes

authored by: Nikolai Peitzmeier, Dirk Michael Manteuffel
Abstract: The design of multiport antennas for multiple-input multiple-output (MIMO) applications utilizing characteristic modes is investigated. For good MIMO performance, uncorrelated antenna ports are generally required. In order to analyze the port correlation, symmetry analysis based on group theory and matrix representations is applied to the theory of characteristic modes. The characteristic surface current densities act as basis functions of the irreducible representations of the symmetry group of the antenna. Current densities belonging to different representations or belonging to different rows of the same representation are orthogonal to each other and can, thus, be excited separately. Therefore, an upper bound for the number of uncorrelated antenna ports can be derived for a given antenna structure based on the symmetry analysis of the characteristic modes. Furthermore, design guidelines on which antenna geometry to choose in order to realize a given number of uncorrelated antenna ports and on how to implement these ports can be deduced. The concept is illustrated by means of examples.
Organisation(s): Institute of Microwave and Wireless Systems
Type: Article
Journal: IEEE Transactions on Antennas and Propagation
Volume: 67
Pages: 3902-3914
No. of pages: 13
ISSN: 0018-926X
Publication date: 06.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electrical and Electronic Engineering
Electronic version(s): https://doi.org/10.1109/tap.2019.2905718 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{84d753861a334790a69dc693b59e4b92,
title = "Upper Bounds and Design Guidelines for Realizing Uncorrelated Ports on Multimode Antennas Based on Symmetry Analysis of Characteristic Modes",
abstract = "The design of multiport antennas for multiple-input multiple-output (MIMO) applications utilizing characteristic modes is investigated. For good MIMO performance, uncorrelated antenna ports are generally required. In order to analyze the port correlation, symmetry analysis based on group theory and matrix representations is applied to the theory of characteristic modes. The characteristic surface current densities act as basis functions of the irreducible representations of the symmetry group of the antenna. Current densities belonging to different representations or belonging to different rows of the same representation are orthogonal to each other and can, thus, be excited separately. Therefore, an upper bound for the number of uncorrelated antenna ports can be derived for a given antenna structure based on the symmetry analysis of the characteristic modes. Furthermore, design guidelines on which antenna geometry to choose in order to realize a given number of uncorrelated antenna ports and on how to implement these ports can be deduced. The concept is illustrated by means of examples.",
keywords = "Antenna theory, characteristic modes, group theory, multimode antenna, multiple-input multiple-output (MIMO), symmetry",
author = "Nikolai Peitzmeier and Manteuffel, {Dirk Michael}",
note = "Funding Information: Manuscript received June 1, 2018; revised February 8, 2019; accepted February 23, 2019. Date of publication March 18, 2019; date of current version May 31, 2019. This work was supported by Deutsche Forschungs-gemeinschaft (DFG) within the Priority Program SPP 1655 under Grant MA 4981/4-2. (Corresponding author: Nikolai Peitzmeier.) The authors are with the Institute of Microwave and Wireless Systems, Leibniz University Hannover, 30167 Hannover, Germany (e-mail: peitzmeier@hft.uni-hannover.de; manteuffel@hft.uni-hannover.de).",
year = "2019",
month = jun,
doi = "10.1109/tap.2019.2905718",
language = "English",
volume = "67",
pages = "3902--3914",
journal = "IEEE Transactions on Antennas and Propagation",
issn = "0018-926X",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "6",
}