Amateur Extra › E9 Antennas and Transmission Lines › E9F12
E9F12
What impedance does a 1/4-wavelength transmission line present to an RF generator when the line is open at the far end?
Pick an answer to check it.
Answer: D. Very low impedance
A quarter-wave line inverts the load. An open at the far end appears as a very low impedance, like a short, at the input.
Tip: Quarter wave flips open to short.