✨ Radio communication

the process of conveying information or message from one place to another is known as communication when electromagnetic waves or radio waves are utilized for communication purposes, then it is called radio communication.

Electromagnetic waves consist of electric and magnetic fields always perpendicular to each other which travel in a perpendicular direction of travel of the wave. Hence radio communication may be defined as "the interchange of intelligence, signals, symbols between two or more places imploying radio waves as the medium of transmission."

although there are many ways of communication in practice today such as line telegraphy, visual signalling, line telephony and so on. But radio communication (also known as wireless communication), is the more fascinating and popular system of communication these days. The essential requirements of any communication system are fundamentally the same for example,,

👉 Means of transmitting the message or information.

👉 Means to carry the message from one place to another.

👉 Means to receive the message.

In other words, a transmitter, a medium to carry the message or information from one place to another and a receiver. In a line telegraphy or telephony, in addition to a transmitter and a reciever (with of course transducers, i.e.., mike loudspeaker or headphone, etc. at transmitting and receiving ends), means of carrying message from one to another is telephone lines whereas in radio communication it is electromagnetic waves which carry the information or message and travel with velocity of light into space which is about 300,000 kilometre per second.

Radiofrequency waves, produced at the transmitter, are carried by transmission lines to an antenna which radiates it in the form of electromagnetic waves into space. Out of these electromagnetic waves some are being intercepted at the receiving end. The process of transmitting electromagnetic waves into space is known as radiation and the bird radio is drive from it. Electromagnetic or radio waves are, thus, the basis of radio science.

The invention of the triode tube in 1906  by lee De forest,  made possible the radio communication.

this was greatly stimulated during world war 2. The invention of the transistor by John Bardeen, William Shockley and W.H Brattain of Bell telephone laboratories in 1948, put radio communication far more advance. the use of transistor, integrated circuit and other semi-conductor devices has rather revolutionized radio communications.

             A morden communication system is initially concerned with the sorting process and sorting of intelligence before its actual transmission. Then actual transmission then follows with further processing and filtering of noise, lastly the reception process which may include processing steps that are decoding storage and interpretation. In this context forms of communications include radio telephony ,radio telegraphy, computer communications, broadcasting, point to point and mobile communications, radar, radio telemetry and radio aids to navigations.