Looking for second satellite for 2nd floor - CBR40 and RBS20

With that type of construction, it will be difficult to get a good wireless backhaul connection to any satellite on the 2nd floor.

Consider running an ethernet wire to the 2nd floor and use that to connect to a RBS satellite on the 2nd floor.

You could also use 2 Powerline devices to get a network outlet on the 2nd floor and connect the RBS satellite to it with an ethernet cable. The speed of the Powerline connection depends on the layout of the pwer supply wiring and circuit breakers.

Be sure to visit the Orbi with cable modem forum. 

https://community.netgear.com/t5/Orbi-with-Built-in-Cable-Modem/bd-p/en-home-orbi-cable

What is the size of your home? Sq Ft?

What is the distance between the router and satellite(s)? 30 feet or more is recommended in between RBR and RBS to begin with depending upon building materials when wirelessly connected. For Concete materials, you need to place RBS much closer or get into some Power Line adapters as suggested to put in another RBS. 
https://kb.netgear.com/31029/Where-should-I-place-my-Orbi-satellite

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rjdollar wrote:
I currently have a CBR 40 with a RBS 20 satellite. That gives us coverage on the first floor of our home. We have weak coverage at times on the second story. The difficulty is the house is built of solid concrete with reinforced rebar, not block, and I think that’s why the second satellite isn’t reaching upstairs fully. Can you recommend a good second satellite for our second floor? Or should I just go with the same model that we already have?

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