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I got the complex conductivity vs. frequency table of a metamaterial. Its first lines are like this:

f conductivity

1GHz 0.004+0.00297i

1.1GHz 0.004+0.00295i

1.2GHz 0.003+0.00294i

the table goes up to 10GHz.

Now the problem is that I need to enter this material into electromagnetic simulation tools. But these tools require a real permittivity and frequency dependent loss tangent (CST and HFSS). So how can I calculate complex permittivity (real permittivity and loss tangent) from the above data?

Thanks in advance.

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# How to calculate complex permittivity from complex conductivity

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