Oggie Lee Johnson, N4WYE, sent this link to a manual for how to use the NanoVNA. You can use the NanoVNA as an antenna analyzer.
Click here for Part 1. Click here for Part 2. (Links updated 1 July 2020.) Note that this will take you away from this website. Use your browser’s back button to return here.
Here’s a corrected link:
http://www.gunthard-kraus.de/fertig_NanoVNA/English/
the “Click here for maual” link goes to a dead page. Can you advise where the Nano VNA link is?