How to calculate the Permittivity of the cotton in the range from 0.5- 1.5 THZ needed to calculate the total pathloss?

I'm new in the field, working on characterization for a model of air , cotton , air in the terahertz band. I need to calculate the Permittivity of the cotton in the range from 0.5- 1.5 THZ needed...

15 December 2019 4,007 2 View