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Geometrical theory of propagation(ID) electromagnetic constants: air wall(generic medium) 1 e,36m 10 Farad/m electric permittivity 4。=4π10Heny/m l=。 magnetic permeability 0=0 o (if lossy) electric conductivity e.=e+ 三 complex permittivity j0 n=1 n 。 refraction index 1。=120π2 intrinsic impedanceGeometrical theory of propagation (II) electromagnetic constants: air wall (generic medium) ε o = 1 36π 10−9 Farad / m ε electric permittivity µo = 4π 10−7 Henry / m µ = µo magnetic permeability σ = 0 σ (if lossy) electric conductivity ε c = ε + σ jω = ε − j σ ω complex permittivity n=1 n  ε c ε o refraction index ηo = 120π Ω η  µ ε c = µo ε c intrinsic impedance
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