Ring wired camera keeps dropping out

[Old Geezer]

I have wired ring doorbell cam, plus 5 wired cameras. On the whole I'm happy with the system, but two of my cameras have issues. The garage cam, which is farthest away (20 meters)from my router, keeps disconecting, and my shed cam (17 meters) usually has low signal strength, although it never drops out. I got the "chime pro wifi" in the hopes it would improve things, but sadly not. I'm guessing with living in a pre 1900 house with double brick walls, the signal has to pass through two of them, plus the concrete garage wall. The router is positioned right at the front and can't be moved due to that's where the fibre comes in. So what I'm looking for is some sort of wifi extender. Any recommendations please? Thanks.

 

[Old Geezer]

When I said "wired" (Ring's description), I mean it has its own power supply (wall wart) as opposed to being battery powered. POE is not applicable.