Field Enhancement in a Grounded Dielectric Slab by Using a Single Superstrate Layer

Figure 6

Enhancement factor as function of the superstrate’s (a) relative permittivity 𝜖_𝑟2 for constant 𝜇_𝑟2=1 and (b) relative permeability 𝜇_𝑟2 for constant 𝜖_𝑟2=2, with 𝑤₂=0.25𝜆₀, ℜ[𝜖_𝑟1]=−5,−2,−0.1,2,5 and ℑ[𝜖_𝑟1]=−0.1|ℜ[𝜖_𝑟1]|.

(a)

(b)