Does anyone know of a mux or similar device that can take output from 2 different Wifi 4x4 radios (one a 2.4G and the other 5G; both use the Broadcom BCM43465 MU-MIMO chipset) and connect them to the same 4 antennas? I don't want to use 8 antennas so looking for way to share the same 4 antennas. I see there are several new 4x4 routers on the market that have a mux built into the motherboard design. I need a separate device to do this. Any ideas???