HP WLAN antenna kit 848228-001 is a replacement antenna assembly for wireless networking in the HP ZBook 15 G3. The service guide lists it as a display assembly component and describes the WLAN antenna cables being routed through channels in the display enclosure.
The exact part is identified by MPN 848228-001. EET describes it as an internal WLAN antenna kit for the ZBook 15 G3 and G4, supporting 802.11ac 2x2 Wi-Fi and Bluetooth 4.2. Its role is to provide the antenna hardware for compatible wireless functions in the workstation.
This is the WLAN antenna kit, distinct from the WWAN antenna kit numbered 848229-001.