Radio signals have a frequency range from 30 khz to 300 ghz which is less than the frequency of visible light.
Radio communication system diagram.
Radio transmitters a radio transmitter consists of several elements that work together to generate.
A transmitter and a receiver.
A trunked radio system is a digital two way radio system that uses a digital control channel to automatically assign frequency channels to groups of users.
In a traditional half duplex land mobile radio system a group of users a talkgroup with portable two way radios communicate over a single shared radio channel with one user at a time talking.
Typical example of communication system are line telephony and line telegraphy radio telephony and radio telegraphy radio broadcasting point to point communication and mobile communication.
But in the later part of the 19th century scientists figured out how to electronically generate radio waves using electric currents.
Various modulation methods like amplitude frequency phase or pulse width modulations are used to transmit information using radio wave communication.
Two components are required for radio communication.
Elements of radio wave communication system a.
These systems typically have access to.
Table 1 1 radio frequency spectrum band name frequency range example communication use extremely low frequency 3 30 hz submarine communications super low frequency 30 300 hz submarine.
The electronics equipements which are used for communication purpose are called communication equipments.
There are many natural sources of radio waves.