Question

In the transmission line shown the impedance Z_in between node A and the ground is

Answer 1

Since line is of length 0.5 λ

 Z_in1 = Z₀ = \(\left(\frac{Z_L+jZ_0tan\beta l}{Z_L+jZ_Ltan \beta l}\right)\)

for λ/2 line \(\beta\)l = \(\frac{2\pi}{\lambda}\) x \(\frac{\lambda}2\)

= \(\pi\)