EEL 3472, Fall 2012 Quiz 3
Name: ___________________________
1 point each, Closed-Note, Closed-Book, Calculators not allowed.
Consider a transmission line described by the distributed line parameters R’, L’, G’,
and C’.
For parts (a) through (e) below leave your answer in terms of R’, L’, G’, and C’.
a. What are the conditions on these parameters for the line to be lossless?
b.
c.
d.
e.
f.
g.
h.
i.
____________________________________
For the lossless line what is the attenuation constant α? __________________
For the lossless line what is the phase constant β? __________________
For the lossless line what is the characteristic impedance Zo? __________________
For the lossless line what is the phase velocity vp? __________________
A lossless transmission line with a characteristic impedance of 1Ω is
terminated in a load with a reactive impedance of j1 Ω. What is the
magnitude of the reflection coefficient?
|Γ| = _______________
For the load in part (f) what is the phase of the reflection coefficient?
Arg(Γ) = ____________________
If a load has a reflection coefficient of 0.5 with an angle of 30 degrees, what is
the voltage standing wave ratio S?
S = _________________
A certain transmission line has a standing wave ratio of S = 3. If the
amplitude of the incident wave is 10 volts what is the amplitude of vmax and
vmin?
vmax = _____________ vmin = ______________
Potentially useful results: