# What is the general procedure for matching networks when there are multiple circuits are connected back to back?

If I have two circuits like the one shown above (Rx antenna -> block1 -> block2 -> Tx antenna), where all should I add matching networks. How should I look at the impedance while doing the matching network? Let's say, if I am adding a matching network in front of Block1, do I have to find the impedance of block1+block2+antenna looking toward the output side or do I have to find the impedance of just block1?

• I'm no antenna or RF guy, but why would you need to impedance match the signal between blocks? Your diagram seems to imply the receiving antenna passes a signal straight through to the transmitting antenna (though I could be wrong, remember not an RF or antenna guy). Commented Jan 29, 2020 at 19:20
• If you have two circuits like the one shown above? Do you really mean the above circuit is repeated? Commented Jan 29, 2020 at 19:24
• No, they are circuits that do different functions. Commented Feb 1, 2020 at 14:36