Simply buy a 15$ TP-Link Wlan router and configure it as a Wlan access point. (most routers say in their description that they can be configured as a Wlan access point)

You can then easily plug any device into you new router with an ethernet cable, and it will have an internet connection.

Dont go with the USB dongles, they cost more when running more hardware, you need to custom configure it in linux on every miner and you might get problems when rebooting.