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An enhanced wideband tracking method for characteristic modes

Published online by Cambridge University Press:  12 February 2024

Chao Huang Open the ORCID record for Chao Huang [Opens in a new window] ,
Chenjiang Guo ,
Xia Ma ,
Yi Yuan Open the ORCID record for Yi Yuan [Opens in a new window]  and
Jun Ding
Chao Huang*
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China
Chenjiang Guo
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China
Xia Ma
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China
Yi Yuan
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China
Jun Ding
Affiliation:
School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China
*
Corresponding author: Chao Huang; Email: huangchaoxidian@163.com
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Abstract

An enhanced wideband tracking method for characteristic modes (CMs) is investigated in this paper. The method consists of three stages, and its core tracking stage (CTS) is based on a classical eigenvector correlation-based algorithm. To decrease the tracking time and eliminate the crossing avoidance (CRA), we append a commonly used eigenvalue filter (EF) as the preprocessing stage and a novel postprocessing stage to the CTS. The proposed postprocessing stage can identify all CRA mode pairs by analyzing their trajectory and correlation characteristics. Subsequently, it can predict corresponding CRA frequencies and correct problematic qualities rapidly. Considering potential variations in eigenvector numbers at consecutive frequency samples caused by the EF, a new execution condition for the adaptive frequency adjustment in the CTS is introduced. Finally, CMs of a conductor plate and a fractal structure are investigated to demonstrate the performance of the proposed method, and the obtained results are discussed.

Keywords

characteristic modescrossing avoidanceeigenvector correlationmode tracking
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 11
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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