14. (5%) Assume there is a short end transmission line with infinite length as the figure shown below. The distributed parameters of the transmission line are R=0.057(Ω/m) ,L=0.25(μH/m) ,G=22.8(HS/m) ,c=0.1 (nF/m). Please evaluate the input impedance 61e4fca91a3fb.jpgat 1 GHz.
61e4fcc594f77.jpg
(A) 0.057 2
(B) 2500 Ω 
(C) 50 Ω
(D) None of the above.

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統計： A(0), B(0), C(1), D(0), E(0) #2853389