Transmitter and Receiver Module

Introduction to transmitter and receiver module

The term communication means the transmission of information from a source, located at one place to a receiver located at another place. The set up used for this purpose is called the communication system. A communication system consists of the transmitter and a receiver. Here we discuss the transmitter and receiving module.Understanding Si Unit of Force is always challenging for me but thanks to all science help websites to help me out.


Transmitter and receiver module


When the distance between the sound source and the receiver is very large, say of the order of several thousands of the kilometers, the electrical signal cannot be directly transmitted through wires or cables. For this situation, the simplest possible communication system is shown below.

The sound signal is converted into electrical signal and it is fed in the amplifier. The amplified electrical signal is radiated in space through a transmitting antenna. This arrangement constitutes the transmitter. Another antenna at the receiving end intercepts the electromagnetic signal travelling in free space with the speed of light. It is the fed to an amplifier and finally to a loudspeaker which converts it into the original sound signal. This arrangement constitutes a receiver.

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Conclusion for the transmitter and receiver module


There are some limitations of this type of the transmitting and the receiving module. The audio frequency (20 Hz to 20 kHz) signals have small power and so they cannot be effectively radiated through a very long distance in the free space. When the different transmitters send signals of different frequencies simultaneously, confusion is created at the receiving due to the interference in the medium. The modulator mixes up the audio signal with the carrier waves and feeds the modulated waves to the transmitting antenna through an amplifier. The antenna radiates the modulated waves into the free space. The receiving antenna intercepts the modulated waves and feeds them in a tunable amplifier, which selects the desired radio frequency waves and passes them to the demodulator. The demodulator separates out the audio signals from the selected modulated waves. Finally, the loudspeaker converts the demodulated audio signal back into the original sound waves.