Fig. 4

Forward-scattering efficiency of nihility, PEC and PMC sphere as a function of b/a when ϵ1 = 2.54, μ1 = 1, a = 0.5 × λ, f = 1GHz.
Forward-scattering efficiency of nihility, PEC and PMC sphere as a function of b/a when ϵ1 = 2.54, μ1 = 1, a = 0.5 × λ, f = 1GHz.