Who first invented radio, who invented radio

In 1893, Tesla made its first public demonstration of radio communications in St. Louis, Missouri, USA. In his presentations for the Franklin College of Philadelphia and the National Electric Light Association, he described and demonstrated the basic principles of radio communications. The instrument he made contained all the essential elements of the radio system before the invention of the tube.

Tesla patented radio technology in the United States in 1897. Marconi obtained a patent for radio technology in England in 1896. The U.S. Patent Office revoked Tesla's patent in 1904 and granted Marconi a patent for the invention of the radio.

This move may have been the result of the influence of Marconi in the United States, including Thomas Edison and Andrew Carnegie. In 1943, shortly after Tesla's death, the U.S. Supreme Court reaffirmed Tesla's patents. This decision recognized that his invention had been completed before Marconi's patent.

Some believe that this decision was made for obvious economic reasons. In this way, the United States** in World War II could avoid paying Marconi royalties for the company's patents. But today, Marconi is often credited with being the first to invent wireless telegraphy.

There is also controversy as to who is the inventor of radio. In 1893, Nikolatesla made his first public demonstration of radio communications in St. Louis, Missouri, USA. Guglielmo Marconi holds what is often considered to be the world's first patent for radio technology, British Patent 12039, "Improvement of electrical impulse and signal transmission technology and equipment required".

Nikola Tesla obtained a patent for radio technology in the United States in 1897. However, the U.S. Patent Office revoked his patent in 1904 and granted Marconi a patent for the invention of the radio instead.

Radio waves refer to electromagnetic waves in the radio frequency band that propagate in free space, including air and vacuum. The shorter the wavelength and higher the frequency of a radio wave, the more information is transmitted in the same amount of time. The modes of propagation of radio waves in space are as follows:

Direct Illumination, Reflection, Refraction, Penetration, Diffraction (Diffraction), and Scattering.

Galilmo Marconi (formerly). Tesla (now).

Guglielmo Marconi (25 April 1874 – 20 July 1937) was an Italian radio engineer, entrepreneur, and founder of practical wireless telegraph communication.

Galilmo Marconi was born on April 25, 1874 in Bologna, Italy. His family was very wealthy, and he studied under the guidance of a governess. While studying at the University of Bologna, he successfully conducted radio communication experiments with electromagnetic waves at a distance of about 2 kilometers.

He died in 1937. In 1897, the "Marconi Wireless Telegraph Company" was founded in London. In 1909, he won the Nobel Prize in Physics with Braun and is known as the "father of radio".

In 1943, the U.S. Supreme Court reversed Marconi's decision and ruled that Tesla was the inventor of the radio. ）