Contents

Electromagnetic Theory
Vector Analysis
Electrostatics
Magnetostatics
Maxwell Equations
Wave Propagation
Transmission Lines
Antennas
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Input Impedance of TL

Zin = Z0*(ZL+jZ0*tan(beta*l))/(Z0+jZL*tan(beta*l)).

Mohith N
Updated: 19 March 2026
8 min read

Input Impedance TL

Test your ability to apply the transmission line input impedance formula under various termination conditions.

Question 1 of 3

Q1.A lossless 50-ohm transmission line of length l is terminated in an open circuit. What is the input impedance Zin?