@Zuph I think as long as the WiFi router is close to the PC and you don't expect very high throughput, some WiFi signals will still get through. This has been my experience with testing embedded WiFi gear without antennas.
BTW, the Raspberry Pi has an interesting antenna-less WiFi design, but I doubt the motherboard has this: [ https://magpi.raspberrypi.org/articles/pi-zero-w-wireless-antenna-design ]
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