Radiation absorbing materials (RAM) as coating

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Hello, I have never used comsol before and I would like to make a simulation of materials in the form of coatings that absorb electromagnetic radiation and see how those materials block the radiation as well as the absorption graph and calculate the S-parameters.

I hope someone can help me with some example or guidance for this.

Thank you very much.


1 Reply Last Post Mar 18, 2021, 1:33 PM EDT
Robert Koslover Antennas, Waveguides, Electromagnetics

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Posted: 3 months ago Mar 18, 2021, 1:33 PM EDT
Updated: 3 months ago Mar 18, 2021, 1:34 PM EDT

You can model those materials just like any other bulk materials in an RF model. The hardest part is that you need to know accurately their characteristic properties (complex epsilon and mu; or equivalent combinations of epsilon, mu, sigma, tan delta,...) at the RF frequencies of interest to you. Accurate information about these kinds of materials may be difficult to find. But, assuming that you can find it, then you are in great shape. Just make sure you use a fine enough mesh within the material, so that your model properly captures the details in the gradients of the fields there.

You can model those materials just like any other bulk materials in an RF model. The hardest part is that you need to know accurately their characteristic properties (complex epsilon and mu; or equivalent combinations of epsilon, mu, sigma, tan delta,...) at the RF frequencies of interest to you. Accurate information about these kinds of materials may be difficult to find. But, assuming that you can find it, then you are in great shape. Just make sure you use a fine enough mesh within the material, so that your model properly captures the details in the gradients of the fields there.

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