Amazon UK are selling a dual-band WiFi adapter for about 11 GBP (approx
15 USD). It contains a RealTek chip, and it comes with a CD with source
for a linux kernel driver which says it is rtl8821ae .
I have a patch to make this work with a 4.19 kernel (Fedora Rawhide a
few days ago).
I believe the driver from Amazon is GPL2, and I am content for my patch
to be taken as GPL2 as well.
If anyone wants to integrate this into the Linux kernel, they should
contact me directly (tjcw at cantab.net) and I will supply the material
which I have.
--
Chris Ward