What device is used to get the signal out from the transmitter?

The antenna is the device that is utilized to transmit the signal from the transmitter into the air as electromagnetic waves. When a transmitter generates a signal, it modulates that signal to carry information, and the antenna is responsible for converting the electrical signals into radio waves, which can then travel through the atmosphere.

The role of the antenna is critical because, without it, the signals generated by the transmitter would remain confined to the device itself and would not propagate beyond it. In radio communication systems, for example, the effectiveness of the antenna can greatly influence the quality and range of the transmitted signal.

Understanding the function of the antenna helps to clarify why it is essential for the transmission of signals in radio and communication systems, as well as for its integral part in the overall process of wireless communication.