Could u be the source?

This is a fairly easy question, especially for those that search very often. I am trying to create a wireless network using serial ports. The question is, Where can I get a detailed schematic diagram for this? I will also accept the answer if you give me the schematic diagram for the transmitter and the schematic diagram for the receiver. And please dont tell me to search for it because I have been doing that and all the schematic diagrams I have seen did not help me. It must be a long range transmitter/receiver.