Sri Lanka Institute of Information Technology
Transmission and Interface Design
2nd Year, 2nd Semester
Tutorial 2
1. What is a transmission line?
.
2. What are the three physical factors that determine the values of
capacitance and inductance of a transmission line?
3. All the power sent down a transmission line from a transmitter can
be transferred to an antenna under what optimum conditions?
4. What is meant by the "steady State Condition" of a circuit
5. “A common rule of thumb is that the cable or wire should be treated as
transmission line if the length is greater than 1/10 of the wavelength”
Transmitter from IC A has frequency component of 1GHz. The signal from
IC A to another IC B on a PCB, travel at speed of 1.5X108 ms-1.
Find the minimum distance above which the signal must be routed as
transmission line.
6. A 2.5m coaxial cable has a total impedance of 125Ω and a velocity factor of
0.6. Find the impedance and capacitance per unit length of cable.
Note: Vp = Velocity factor * Wave velocity in vacuum
7. The total capacitance and inductance of a 5m two wire lines is
respectively 529pF and 1322.75nH. The velocity factor is 0.63. Find Vp
and Z0.
8. A 50-Ω lossless transmission line is terminated in a load impedance ZL
= (30 − j200) Ω. Calculate the voltage reflection coefficient at the load.