Consider the 3 m long lossless air-filled transmission line shown in the figure. It has a characteristic impedance of 120πΩ, is terminated by a short circuit and is excited with a frequency of 37.5 MHz. What is the nature of the input impedance (Zin)?
(A) Open
(B) Short
(C) Inductive
(D) Capacitive
Correct option (D) Capacitive
Explanation:
For a lossless transmission line input impedance is given by,
Since Zin is negative, it suggests a capacitive behavior.
