Review Quiz: Transmission Lines

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.