Calculation of electromagnetic parameter based on interpolation algorithm

• We use interpolation algorithm on calculation of EM-parameter with limited samples.
• Interpolation method can predict EM-parameter well with different particles added.
• Hermite interpolation is more accurate than Lagrange interpolation.
• Calculating RL based on interpolation is consistent with calculating RL from experiment.

Wave-absorbing material is an important functional material of electromagnetic protection. The wave-absorbing characteristics depend on the electromagnetic parameter of mixed media. In order to accurately predict the electromagnetic parameter of mixed media and facilitate the design of wave-absorbing material, based on the electromagnetic parameters of spherical and flaky carbonyl iron mixture of paraffin base, this paper studied two different interpolation methods: Lagrange interpolation and Hermite interpolation of electromagnetic parameters. The results showed that Hermite interpolation is more accurate than the Lagrange interpolation, and the reflectance calculated with the electromagnetic parameter obtained by interpolation is consistent with that obtained through experiment on the whole.