Meh, this 1:9 #unun is not working properly or the connected 450 ohm load has a significant inductance that messes up the measurement 🤔
Also discovered that a #NanoVNA-H can malfunction when its battery is completely discharged, it only booted up again after disconnecting and reconnecting the battery... #hamradio#vectornetworkanalyser
My living room as an antenna test chamber 😂 Well, it was a rainy day, couldn’t set it up outside.
I’m testing a 2.4GHz dish, meant for WiFi links, but as it turns out, it has a decent match at 1420MHz so it’s actually usable as a Hydrogen Line radio telescope antenna.
Traversing in front of it, you can see its impedance (S11 for the experts) change. This happens because I’m affecting its near field. In human understandable terms: being sufficiently close to the antenna affects how it performs.
With my newly acquired LNA, this will likely end up being a much more portable Hydrogen Line radio telescope, I have high expectations 😃