The Italian engineer GuGrimau Marconi invented the wireless telegraph. He is an Italian radio engineer, entrepreneur and founder of practical wireless telegraph communication.
1896, he made a demonstration test of this device in Britain. At the end of this year, he obtained the world's first patent for wireless telegraph system and the first patent for this invention.
Marconi successfully demonstrated his communication equipment in London, Fort Saris Plain and Bristol Bay. 1898 is the first radio transmission. The next year, his radio signal crossed the English Channel. 1909 won the nobel prize in physics with Braun, and was called "the father of radio".
The principle of wireless telegraph:
Telegraph information is sent in the form of electrical signals through special exchange lines. This signal uses a code instead of words and numbers, and the commonly used code is Morse code. Morse code encodes English letters and numbers into points and lines, which is simple and convenient for transmission.
Zhihu- 1909 Nobel Prize winner invents wireless telegraph.