Many explanation around techniques, permittivity measurements, technique, schematic diagram, and permittivity are explained inside the paper. In the paper you can get information about resonator, measurements, resonators, and dielectric resonator.
The paper tells us discussion such as transmission, electromagnetic ﬁelds, the complex permittivity, radiation, and permeability. Here are chosen from the paper:
The complex permittivity of an isotropic material in general can be written as σ ε = ε0 εr = ε0 εr − jεrd − j = ε0 εr (1 − j tan δ) (3) ωε0 where tan δ is the total dielectric loss tangent given by σ tan δ = tan δd + (4) ωε0 εr where εr is the relative complex permittivity, ω is the angular frequency, σ is the conductivity, ε0 = 1/(c2 µ0 ) ≈ 8.8542 × 10−12 (F m−1) denotes permittivity of vacuum and tan δd is the © 2006 IOP Publishing Ltd Printed in the UK R55 Review Article dielectric loss tangent associated with all other dielectric loss mechanisms except conductivity. Measurement method of complex permittivity for dielectric resonator materials at microwave frequency (www.iec.ch)  Kobayashi Y and Katoh M 1985 Microwave measurement of dielectric properties of low-loss materials by the dielectric rod resonator method IEEE Trans.
Furthermore, this paper tells the reader information regarding analysis, measurement, permeability tensor, and measurement cell.