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1 results

  • An enhanced wideband tracking method for characteristic modes

  • Chao Huang, Chenjiang Guo, Xia Ma, Yi Yuan, Jun Ding
  • Journal:
    International Journal of Microwave and Wireless Technologies / Volume 16 / Issue 7 / September 2024
    Published online by Cambridge University Press:
    12 February 2024, pp. 1144-1154

  • 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.