If you want a precise and real
measurement you should connect the NANO-VNA as close as possible to the antenna feed
point.
I have a -F and I have never encountered this problem with either a 10 m coaxial or a 40 m coaxial (3-30 MHz). I make my measurements from the station, the NanoVNA being connected to my PC.
The measurements I make, by calibrating at the connection to the antenna are a priori good since this is where I insert my LC adapters. These adapters are calculated on the basis of the s1P files; I measure the components. Then I refine the settings by mounting the adapter upside down in order to find the impedance measured in the s1p. And it works.
This is also the only way to integrate the coaxial sheath into the measuring device.
--
F1AMM
Fran?ois
-----Message d'origine-----
De la part de ?lvaro Felipe Hern¨¢ndez
Envoy¨¦ : vendredi 17 janvier 2025 15:40
