Hello, I recently purchased a nanovna s-a-a-2 (hardware version v2_2, 50k-30ghz, owocomm design), and after around 2 weeks of work the measurements on the s11 port decided to malfunction.
At the time of the s11 port breaking a simple v dipole was connected to the s11 port of the analyzer, and the nanovna was plugged into a usb port on my computer, where i was getting my measurements from using vna_qt.
After the malfunction I tried the following:
1) inspect my sma ports to make sure the little spring contacts weren't bent or out of place
2) connected all the different types of calibration loads directly to the s11 port with no change in any parameter
3) I connected a regular sma connector to both ports at once and observed the s21 logmag value change, which seems to imply that something is wrong with the s11 port only
4) disassembled the vna to check if there was some obviously blown up component (there arent any, even under the metal shielding)
5) cleared
Please help diagnose and potentially fix this problem.
I attached 3 pictures of the analyzer: one with no connections, one with the 50ohm load, and one with an sma connector connecting the 2 ports.
