What Wi-Fi USB adapters are the most popular for injecting in Kali Linux?
A recent poll from WirelesSHACK shows these results:
The Alfa AWUS036NH and the AWUS036NHA are clear cut winners (graphic source https://www.wirelesshack.org/best-kali-linux-compatible-usb-adapter-dongles.html)
The AWUS036NH is a 2.4 GHz product with the Ralink (Mediatek) RT3070 chipset. The AWUS036NHA is also 2.4 GHz and uses the Atheros AR9271 chip.
Both models are excellent choices with great performance. If you need a Wi-Fi adapter for Kali Linux, Kali users have spoken, and their choice is one of these two.