Question

A transmission line of 50 Ω characteristic impedance is terminated with a 100 Ω resistance. The minimum impedance measured on the line is equal to

(a) 0 Ω

(b)25 Ω

(c) 50 Ω

(d)100 Ω

Answer 1

Correct option (b)25 Ω

Explanation:

z0 = 50Ω

zL = 100Ω

zL > z

zin(min) = z20/zL

= (50 x 50)/100 = 25Ω