I am trying to connect three nodes(A,B,C) through RF cables in the following manner : A can communicate with both B and C(and vice versa), but B and C cannot communicate directly.
Somebody suggested using a splitter for this work, but when I tested one I found that all three nodes could communicate with each other. Now, somebody is telling me to use a coupler. Can a coupler achieve what I want? What is the difference between splitter and coupler?
PS: I am working in the 2.4GHz band(wifi), if that makes a difference.