Several viewers have asked for links to the gear I've used here. The noise generator and RF bridge were bought from eBay vendors so the links will only last a short time after the auction ends. For now, they are:
https://www.ebay.com/itm/RF-bridge-0-5-3000-MHz-VNA-Return-Loss-VSWR-SWR-reflection-bridge-antenna/332052527822
and
https://www.ebay.com/itm/noise-source-Simple-spectrum-external-tracking-source/121407556932?hash=item1c44744d44:g:-TcAAOSwTf9ZR53Q
An antenna return loss chart is here:
https://www.ducommun.com/engineeredsolutions/millimeterwave/convcharts.aspx
And the SDR receivers can be found here:
https://www.sdrplay.com/
