Is there a way to make the NanoVNA show the SWR as close to 1:1 on 300 ohm antennas when measuring directly without an impedance transformer, while still showing correct impedance? I need to measure just the antenna, so that the cables and impedance transformers don't affect the result. I tried calibrating with 300 ohm load, but then it shows 300 ohms as 50 ohms when measuring impedance.
Attached example - FM folded dipole readout with NanoVNA calibrated with 50 ohm load, and with 300 ohm load
goscickiw
