Ancient Times used light or flags for wireless communication.
Light was modulated using mirrors (amplitude modulation) OR flags were used to signal code words (amplitude-frequency modulation)
Scientist who contributed in the development of wireless communication are:
Claude Chappe invented optical telegraph in 1794
Alexander Graham Bell invented telephone in 1843.
Michael Faraday and Joseph Henry demonstrated electromagnetic induction.
James Maxwell layed theoretical foundation of electromagnetic fields in 1864.
Heinrich Hertz demonstrated the wave character of electrical transmission through space.
Nikola Tesla increased the distance of electromagnetic transmission.
Guglielmo Marconi gave first demonstration of wireless telegraphy in 1895. He used long wave transmission.
Later he discovered short waves (that are reflected by ionosphere) for wireless transmission.
Lee DeForest and Robert von Lieben invented electronic vaccum tubes in 1906 that reduced the size of sender and receiver.
Edwin Armstrong invented frequency modulation in 1933.
