The first questin is in our mind who invented radio? Let’s read today this article where we are going to explain overview and history of radio also all things mentined who invented radio when or etc.. After Samuel Morse and Alexander Graham Bell developed the telegraph and telephone, the scientists and inventors of the nineteenth century encountered a new challenge: To transmit the sound without using the cable.
The first to make a stride toward this path was the Scottish James Clerk Maxwell, who displayed the Electromagnetic Theory in 1867, where, by numerical counts, he anticipated the plausibility of making electromagnetic waves and spreading them through space.
20 years later, German physicist Heinrich Hertz tested Maxwell’s theory. He made an oscillator with which he could create electromagnetic waves and showed that they had the same characteristics as light. In this way, it was proven that, by building the appropriate transmitting and receiving devices, it was possible to transmit sounds without the need for cables.
From then on, many scientists tried to improve that transmission. The Frenchman Edouard Brandly invented the cohes or, an apparatus capable of detecting electromagnetic waves, and the Russian Alexander Popov developed the first antenna.
First Transmissions
Finally, the Italian Guglielmo Marconi began testing by joining all these devices and managed to make the first transmission in 1894: he sent sound signals 250 meters away. Two years later, he patented his invention, setting a date for the birth of the radio.
However, Marconi did not receive support in Italy, so he went to Britain where he continued his experiments. In 1898, he launched the first radiotelegraphy service; A year later, he made the first communication between England and France, and in 1901, he managed to carry out the first transatlantic transmission, between Podhu (Great Britain) and Newfoundland.
Soon, it was shown that radio was a system of great value. For example, in 1899, the crew of the R. F. Mathews ship could be saved after reporting by radio that they had collided with a lighthouse.
Voice and Music
At first, the radio only sent sound signals, the Morse code. However, at the beginning of the 20th century, they managed to convert voice and music into electromagnetic signals through the first microphones.
It was in 1915 when he got the word out for the first time. It was broadcast from Vermont and was heard in San Francisco, Hawaii and Paris. Five years later, the British company Marconi Wireless issued a concert of classical music.
In these first years of the twentieth century, hundreds of stations were born both in the United States and in Europe. The TSF started the first trials in Paris in 1921 and used the Eiffel Tower as an antenna. In 1922, the British Broadcasting Company (BBC) public radio was born in the United Kingdom, while the first Spanish state radio station, Radio Ibérica, was inaugurated in May 1924.
One of the main problems of those early years was the shortage of antennas and receivers, so many fans chose to build these devices themselves. Over time, more receivers went on sale and became more accessible.
Technological Advances
The development of the technology allowed to improve the quality of the transmissions. It should also be noted that the beginning of FM (Frecuency Modulation) broadcasts meant a significant change in the operation of the radio. Until then, the sound was modulated through AM (Amplitude Modulation) that can transmit over longer distances, but with worse quality.
Throughout the twentieth century, radio has experienced moments of great uncertainty, including the birth of television. At first, it seemed that this was a threat to the radio, although it has not turned out to be so.As in all sectors, technological advances have greatly influenced the media. In 1961, the first artificial satellite for radio use was put into orbit. In this way, they allowed to send the signal much further.
The last revolution in radio has been digitalization, which has reached the end of the 20th century. Many stations already broadcast digitally and, in a few years, all of them must digitize their systems.