* Modulation: It applies the data/audio/video information to the radio carrier wave so that it carries valuable data.
* Transmission Antenna: The modulated carrier wave is radiated through an antenna.
2. Receiver
* Reception Antenna: The transmitted radio waves are captured by the receiver's antenna.
* Demodulation: The receiver demodulates the carrier wave to extract the original information.
* Amplification: The demodulated signal is weak and needs to be amplified to a usable level.
* Filtering: The amplified signal may contain noise and unwanted signals; filters remove them.
3. Output Device:
* The resulting signal is presented to the user in the desired form, i.e., audio (music, speech) through a speaker, and visual (TV) on the screen.
In summary, the basic radio principle involves transmitting modulated carrier waves through antennas and receiving, demodulating, amplifying, filtering, and presenting the original information to the user via appropriate output devices.