Date First Published: 27th March 2022
Topic: Computer Networking
Subtopic: Data Transmission Technologies
Difficulty: EasyDifficulty Level: 2/10
Learn more about what wireless is in this article.
Wireless is an adjective that describes network technologies that enable devices, such as laptops, smartphones, and tablets, to connect without any wires, as suggested in the word. An example of a wireless network technology is Wi-Fi, which was developed by the Wi-Fi Alliance, since it connects devices to each other using radio waves through a router, which uses a cable to connect to the servers of the ISP.
Any communication that occurs between devices without a cable or wire is known as wireless communication.
As of now, there are lots of wireless technologies that exist. Examples include:
In 1880, the first known wireless telephone conversation happened. It was when Alexander Graham Bell and Charles Sumner Tainter invented the photophone, a telephone that sent audio over a beam of light. This telephone required sunlight and a clear line of sight between the transmitter and receiver in order for it to work.
Before effective radio systems became available, a number of wireless electrical signalling methods were developed for telegraphy, including sending electric currents through water and the earth using electrostatic and electromagnetic induction. There was an invented induction system that was created by Thomas Edison that allowed a telegraph on a moving train to connect with telegraph wires running parallel to the tracks, an initiation telegraph system by William Preece for sending messages across bodies of water, and several different proposed telegraphy and voice earth conduction systems.
Guglielmo Marconi began creating a wireless telegraph system using radio waves in 1894, which had been known about since Heinrich Hertz proved their existence in 1888, but it had been disapproved as a communication format since they only appeared to be short-range at that time period, meaning that they could only carry signals over a limited distance. Marconi quickly developed a device that was capable of carrying signals over large distances. The Nobel Prize in Physics was given to Marconi and Karl Ferdinand Braun in 1909 due to their contributions to wireless telegraphy.
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