Amateur Extra › E9 Antennas and Transmission Lines › E9F11
E9F11
What impedance does a 1/8-wavelength transmission line present to an RF generator when the line is open at the far end?
Pick an answer to check it.
Answer: C. A capacitive reactance
An open line shorter than a quarter wave looks capacitive at the input. At 1/8 wave, it is a capacitive reactance.
Tip: Open and short line = capacitor.