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All transmission line section in Figure, have a characteristic impedance R0 + j0. The input impedance Zin equals(a) 2/30 (b) 0 (c) 3/20 (d) 20 |
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Answer» Correct option (b) R0 Explanation: For λ/4 line, zin1 = z20/zL = R20/R0/2 = 2R0 For λ/2 line, zL2 = 2R0 For λ/8 line, zL = (2R0)|| 2R0 = R0 For transmission line of length l, zin = z0[(zL + jz0tanβl)/(z0 + jzLtanβl)] l = λ/8, zin = z0[(zL + jz0)/(z0 + jzL)] zin = R0[(R0 + jR0)/(R0 + jR0)] = R0 |
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