Consider the media consisting of the atoms and molecules that are polarizable. Additionally, consider also the presence of free charges in the media, which have ability to create current in the media in question. How does the additional current, on top of the polarizability, leads to presence of complex permittivity of the media? b. Show that the conduction current term in the Maxwell's Equation can indeed be interpreted as the imaginary part of the permittivity of the media in question. с.Dielectric constant of FR-4 substrate is 4.9 with loss tangent defined as 0.008 at frequency of 100MHz. a. Calculate the complex dielectric constant of the media. b. Calculate the conductivity of the substrate at 100 MHz.

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