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A transmission line has a characteristic impedance of 50Ω and a resistance of 0.1Ω/m. If the line is distortion less, the attenuation constant (in Np/m) is (a) 500 (b)5 (c) 0.014 (d)0.002 |
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Answer» Correct option (d)0.002 Explanation: Attenuation constant α to be independent of frequency for distortion less transmission α = √(RG) For distortion less transmission: L/C = R/G z0 = √(L/C) = √(R/G) α = √(RG) = √R(√R/z0) = R/z0 = 0.1/50 = 0.002Np/m |
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