High Quality Content by WIKIPEDIA articles! A transmitter is an electronic device which, usually with the aid of an antenna, propagates an electromagnetic signal such as radio, television, or other telecommunications. Generally in communication and information processing, a transmitter is any object which sends information to an observer. When used in this more general sense, vocal chords may also be considered an example of a transmitter. n radio electronics and broadcasting, a transmitter usually has a power supply, an oscillator, a modulator, and amplifiers for audio frequency and radio frequency.