What is a receiver in radio communication?
In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used with an antenna.
How does radio communication work?
Radio works by transmitting and receiving electromagnetic waves. The radio signal is an electronic current moving back and forth very quickly. A transmitter radiates this field outward via an antenna; a receiver then picks up the field and translates it to the sounds heard through the radio.
What is the example of receiver communication?
Examples are telephone receivers, which transform electrical impulses into audio signals, and radio or television receivers, which accept electromagnetic waves and convert them into sound or television pictures.
What is the simplest radio receiver?
Crystal radios
Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of wire, a capacitor, a crystal detector, and earphones (because a crystal set has insufficient power for a loudspeaker).
What are the basic blocks of communication system?
The essential components of a communication system are information source, input transducer, transmitter, communication channel, receiver and destination.
What type of communication does the radio use?
Radio is sound communication by radio waves, usually through the transmission of music, news, and other types of programs from single broadcast stations to multitudes of individual listeners equipped with radio receivers.
Which is radio receiver has a simpler block diagram?
Normally low cost broadcast and other forms of radio receiver tend to have much simpler block diagrams and the higher performance radios used for professional radio communications and monitoring applications tend to have more complicated block diagrams.
What is the block diagram of a superheterodyne AM receiver?
The block diagram of a superheterodyne AM receiver is shown in the figure. The first section of a radio receiver is always a RF section, which is a tunable circuit connected to the antenna terminals. It is used to select only the desired RF signal out off a number of frequencies to the receiver.
What is the working principle of a radio transmitter?
Radio Transmitter Working Principle Any oscillator will produce radio frequency waves. When the oscillator is connected to an antenna system, it sends energy into the atmosphere. Amplification will increase the amplitude of the oscillator wave so that it will drive a final power amplifier.
What does amplification do to a CW transmitter?
Amplification will increase the amplitude of the oscillator wave so that it will drive a final power amplifier. A block diagram of a simple continuous wave (CW) transmitter is shown in Figure 6. The first block is the conventional crystal oscillator and then the final power amplifier.