Transmission through a wall (1/5) Hypotheses:-normal or quasi-normal incidence -weakly lossy medium cos0, sin20 Pin n 1 rl-Til= Pout n 1+√e sin20, Pre 2n_ E 2n (Source:Prof.H.L.Bertoni) Transmission through a wall (1/5) S re Sin = E re 2 2η Ein 2 2η = E re 2 Ein 2 ≈ Γ 2 pin pre pout (Source: Prof. H.L. Bertoni) * Hypotheses: - normal or quasi-normal incidence - weakly lossy medium Γ ≈ ΓTE = cosθi − n2 n1 ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ 2 − sin2 θi cosθi + n2 n1 ⎛ ⎝ ⎜ ⎞ ⎠ ⎟ 2 − sin2 θi = 1− ε r 1+ ε r w