Do you know where I could find material tables for electromagnetic properties? Especially for complex permittivity, and permeability, in the 100kHz - 10Ghz band. (hopefully at a few points within this band) My usual google fu is failing me. I've found some books and tables but they're usually pretty limited (like just permittivity of glasses or only have the permeability/permittivity at DC).It seems like this is something an RF engineer would need all the time, so I feel like such tables have to exist somewhere. Any ideas of where I could look?