Radio technology has become a prominent part of our everyday life. It is used in everything from broadcast radio and television signals to mobile phones, internet, and many more things. Normally, a radio work on the basis of two parts, transmitter and receiver.


It is an electric circuit that converts the electric power into a radio frequency. The radio frequency is in the form of alternating current, which reverses millions of time per second. This energy reversing rapidly radiates in the form of electromagnetic waves, off a conductor called antenna. Transmitters impress the audio or video signals onto radio frequency current that gets carried by the radio waves.

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These radio waves are captured by the receivers and information is extracted. Normally, a transmitter consists of three parts namely – power supply, electronic oscillator and a modulator.

Working of a transmitter-