Patent ID: 8653819

Claim:
A method of calculating, in one or more computers, a complex-valued dielectric permittivity (∈) or a complex valued magnetic permeability (μ) of at least one material, comprising: (a) receiving, in one or more of the computers, a measured complex-valued resonance frequency Fmaterial of a cavity containing the material, wherein Fmaterial is a measurement obtained by exciting the cavity with one or more transverse magnetic TM 0n0 cavity resonant modes; (b) in one or more of the computers: (1) receiving a solution of Maxwell's equations for a complex-valued resonance frequency function F of the cavity containing the material, wherein the F is a function of ∈ or μ or ∈ and μ of the material, (2) numerically or analytically solving an equation F=Fmaterial exactly for the ∈ or the μ, wherein the ∈ or the μ is the only unknown; and (c) outputting, from one of the computers, the ∈ or μ.