RF modulators and demodulators are electronic devices used in communication systems to convert signals between baseband and radio frequency (RF) domains. RF modulators take an input signal and modulate it onto an RF carrier wave, allowing it to be transmitted wirelessly. Demodulators, on the other hand, receive RF signals and extract the original baseband signal for further processing or decoding. These components are essential in various applications such as wireless communication, broadcasting, and satellite systems.