5.39. A dielectric slab of polystyrene ($\epsilon_r = 2.56$), of any thickness, is bounded on both of its sides by air. In order to eliminate reflections on each of its interfaces, the slab is covered on each of its faces with a dielectric material.
At a frequency of 10 GHz, determine, for each dielectric material that must cover each of the faces of the slab, the:
(a) Thickness (in $\lambda_1$; wavelength in the corresponding dielectric).
(b) Thickness (in cm).
(c) Dielectric constant.
(d) Intrinsic impedance of its medium.
(e) SWR created in air when a plane wave impinges at normal incidence from one of its sides when the slab is covered with the selected cover material.
