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WorksheetsReview Quiz: Transmission Lines
Total questions: 15
Worksheet time: 9mins
The most commonly used transmission line is a
Two-wire balance line.
Single wire.
Three-wire line.
Coax
The characteristic impedance of a transmission line does not depend upon its
Length.
Conductor diameter.
Conductor spacing.
None of the above.
Which of the following is not a common transmission line impedance?
50Ω
75Ω
120Ω
300Ω
For maximum absorption of power at the antenna, the relationship between the characteristic impedance of the line Zo and the load impedance ZL, should be
Zo=ZL
Zo = 0
Zo < ZL
Zo>ZL
The mismatch between antenna and transmission line impedances cannot be corrected for by
Using an LC matching network.
Adjusting antenna length.
Using a balun.
Adjusting the length of transmission line.
A pattern of voltage and current variations along a transmission line not terminated in its characteristic impedance is called
An electric field.
Radio waves.
Standing waves.
A magnetic field.
The desirable SWR on a transmission line is
0.
1.
2.
Infinity.
A 50-Ω coax is connected to a 100-Ω antenna. The SWR is
0.685.
1.46.
2
0
The most desirable reflection coefficient is
0.
0.5.
1.
Infinity.
A ratio expressing the percentage of incident voltage reflected on a transmission line is known as the
Velocity factor.
Standing-wave ratio.
Reflection coefficient.
Line efficiency.
The minimum voltage along a transmission line is 260 V, while the maximum is 390 V. The SWR is
0.67.
1.0.
1.2.
1.5.
Three feet is one wavelength at a frequency of
100 MHz.
164 MHz.
300 MHz.
328 MHz.
At very high frequencies, transmission lines are used as
Tuned circuits.
Antennas.
Insulators.
Resistors.
A shorted quarter-wave line at the operating frequency acts like a(n)
Series resonant circuit.
Parallel resonant circuit.
Capacitor.
Inductor.
A shorted half-wave line at the operating frequency acts like a(n)
Capacitor.
Inductor.
Series resonant circuit.
Parallel resonant circuit.
