Electromagnetic Parameter Extraction Algorithm Based on Modified Harris Hawks Optimization–Differential Evolution

doi:10.1109/lawp.2026.3714545

Electromagnetic Parameter Extraction Algorithm Based on Modified Harris Hawks Optimization–Differential Evolution

2026-07-17

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DOI：10.1109/lawp.2026.3714545

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This letter proposes a hybrid modified Harris Hawks optimization–differential evolution (MHHO–DE) algorithm for accurate complex permittivity extraction. While existing methods often struggle with premature convergence and local optima trapping, MHHO–DE ensures robust global searching. Compared to particle swarm optimization, MHHO–DE effectively escapes local optima, reducing the final extraction error by more than 30% for three diverse building materials in the 19 GHz to 35 GHz band. It also enables thickness measurement with errors as low as 0.45%. This method provides network engineers with a convenient tool to evaluate building materials’ wireless performance during building design.

Keywords:

Building materials

complex permittivity

free-space method

modified Harris Hawks optimization–differential evolution (MHHO–DE)

wireless performance

Electromagnetic Parameter Extraction Algorithm Based on Modified Harris Hawks Optimization–Differential Evolution

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