I want to design my own Wi-Fi router from ground zero, where should I start ?

Thank you so much, these links re really use full and helped me where to start.

I'm still mostly a noob myself so I can't really help you there, but Mr. Carlsons's lab on youtube is a RF goldmine. Mostly about old tube radios and amplifiers but the principles are still mostly the same afaik. He's an RF wizard and worth watching.

Here's a good talk I found about RF/microwave considerations for board design.

The speaker, Seth Hillbrand, does dark matter research and his talk is about an instrument he designed that had to have a broad range of signals it could operate in from 300 Mhz - 3 Ghz

https://youtu.be/k-5CuN7iANQ

Hi Ahmad_Arsh,

Though I don't have any background with RF design, i found some interesting articles that you might want to check out here: https://www.reddit.com/r/homelab/comments/ajckej/building_my_own_wireless_router_from_scratch/

You can also consider IOcase's suggestion if you want to learn more about RF.

Thanks,
Faust