Yes, it is feasible to divide a coaxial cable for two separate routers while maintaining performance.
Yes, it is feasible to divide a coaxial cable for two separate routers while maintaining performance.
You're setting up a 2.4GHz/b/g/n router on the floor and a 5GHz/AC router upstairs using coaxial cabling to avoid interfering with the 2.4GHz network.
This approach is being used instead of a coaxial setup because an Ethernet cable would connect directly between them. If you're trying this on the line itself, it won't function properly. The existing line or ISP equipment wouldn't handle two signals over the same channel effectively.
I assume you're using Moca adapters to achieve this. Moca supports up to 800 Mbps with Bonded adapters, so you shouldn't run into problems splitting the connection. Just keep in mind that if you use the same coax for your cable modem, avoid splitting it too many times before the modem. You should be limited to a maximum of two-way splitters or an unbalanced three-way splitter where the modem is connected to the 3.5 dB port.