I have thrown together a basic cellular modem expansion card PCB design on github, but I am not a professional and I would like some review or feedback on the design before I proceed to making prototype boards.
This design is 15mm longer than the example expansion card PCB so it will protrude out of the expansion card slot, but should still be more compact than trying to rework cellular adapters on the market into USB C. I am also using IPEX-I connectors, so you are free to pair it with flat antennas for compactness or SMA adapters for the big boy antennas.
The board should be compatible with Quectel EG95 (LTE Cat 4) and EG91 (LTE Cat 1) modems, and also BG96 (Cat M, Cat NB1) for the people who work with IoT and things like that.
