Product recommendation for data on an existing wire.

Hi,

There has been a few applications where the transceiver data is actually sent on a wire. 

Using capacitive coupling or transformer concept is an option here.

As a first step would recommend to test with LaunchPads and to add the wire via capacitive coupling to the SMA connectors to test the concept.

Can you share more information about the application ?

The application is sending data from add on equipment to remote industrial equipment.  There is a copper wire connection from the remote location to the equipment for the purpose of a remote safety or run switch closure.  The copper connection can't be disturbed for safety reasons; i.e the switch can't be sensed and converted to data to activate a remote contact closure.  This was the reason for thinking RF as the switch could be isolated from the RF with inductance while preserving the low resistance physical safety connection.

The copper connection length  might statistically fall on a null distance for the frequency selected.  Frequency agility could then be used to sense the null and move to an off null frequency.  Power would be adjusted to just pass data above the minimum power required for a specific data rate.

My Chipcon experience was last visited in 2009 while an FAE for TI so my info base is dated.