Transmission Lines Flashcards
What is the meaning of the term velocity factor of a transmission line?
The velocity of the wave on the transmission line divided by the velocity of light in a vacuum.
What determines the velocity factor in a transmission line?
Dielectrics in the line.
Nitrogen is placed in transmission lines to:
Prevent moisture from entering the line.
A perfect (no loss) coaxial cable has 7 dB of reflected power when the input is 5 watts. What is the output of the transmission line?
1 watt
Referred to the fundamental frequency, a shorted stub line attached to the transmission line to absorb even harmonics could have a wavelength of:
1/4 wavelength
If a transmission line has a power loss of 6 dB per 100 feet, what is the power at the feed point to the antenna at the end of a 200 foot transmission line fed by a 100 watt transmitter?
6 watts