Abstract
A hybrid approach, based on the two-dimensional finite-element method (2-D-FEM) and a genetic algorithm (GA) optimization, is used to extract relative permittivity and permeability of ferrites and flexible magnetodielectric composite materials over wide frequency bands. S-parameters of a material under test (MUT) placed into a coaxial fixture are measured by a vector network analyzer and simulated using the 2-D-FEM code. The GA optimization procedure is then used to minimize the discrepancies between the measured and simulated S-parameters by iteratively searching the possible best permittivity and permeability. Multiterm Debye models of wideband complex permittivity and permeability are employed here for a frequency-dispersive MUT. This greatly reduces the number of unknowns in the GA optimization. The proposed method is tested with PTFE and a virtual magnetic material.
Original language | English |
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Article number | 7047818 |
Pages (from-to) | 349-356 |
Number of pages | 8 |
Journal | IEEE Transactions on Electromagnetic Compatibility |
Volume | 57 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Jun 2015 |
Externally published | Yes |
Keywords
- Dispersive media
- ferrites
- finite-element methods (FEM)
- genetic algorithm (GA)
- magnetodielectric materials
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering