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History
Laptop 1970s
Main article: History of mobile phones
Motorola DynaTAC 8000X Analog Advanced Mobile Phone System phone from 1983
In 1908, U.S. patent 887,357 for a wireless telephone was issued to Nathan B Stubblefield of Murray, Kentucky. He applied this patent to "radio" cave telephones and not directly to mobile phones that the term is currently understood. The cells of GSM base stations were invented in 1947 by engineers at Bell Labs AT & T and developed by Bell Labs in the 1960s. Radiotelephones have a long and varied history going back to Reginald Fessenden's invention and shore-ship demonstration of radio telephony, through the Second World War with military use of radio telephony links and civil services in the 1950s, as mobile handheld devices are available since 1973. A patent for the first wireless phone as we know it today was published in U.S. Patent No. 3,449,750 of George Sweigert of Euclid, Ohio, June 10, 1969.
In 1945, the zero generation (0G) of mobile telephones was introduced. [Citation needed] Like other technologies of the time, it was a single base station covering a powerful wide area, and each telephone would to monopolize a channel over that area while in use .
In 1960, the world premiere of partially automated phone Mobile System In Car (MTA) | MTA was launched in Sweden. With MTA, calls can be made and received in the car to / from the public telephone network, and the car phone can be paged. The phone number has been composed using a rotary dial. Call the car was fully automatic, while calling it required an operator. The person who wanted to call a mobile phone should know what base station of the mobile phone has been covered. The system was developed by Sture Laurn and other engineers at the network operator Televerket. Ericsson provided the switchboard in Radioaktiebolaget Svenska (SRA), owned by Ericsson and Marconi, as long as phones and base station equipment. phones MTA consisted of vacuum tubes and relays, and had a weight of 40 kg. In 1962 a more modern version called Mobile System B (MTB) has been launched which is a touch-tone phone, and use transistors to improve the ability of the caller and improve its operational reliability. In 1971, BAT version was launched, the opening of several brands of equipment and obtain a commercial success.
The concepts of frequency reuse and delivers it, and a number of other concepts that formed the basis of modern cell phone technology, have been described in the 1970s, see eg Nussbaum and Fluhr, Hachenburg and al. And U.S. Patent 4,152,647, issued May 1, 1979 to Charles A. Gladden and Martin H. Parelman, both of Las Vegas, Nevada and assigned by the Government of the United States.
Martin Cooper, a researcher at Motorola, and the executive is regarded as the inventor of the first practical mobile phone for use in hand in a non-vehicles. Cooper is the first inventor named "Radio telephone system" filed on October 17, 1973, with the U.S. Patent Office and, later published as U.S. Patent 3,906,166, other employees named in the patent included skipper Cooper, John F . Mitchell, head of Motorola's mobile communications products, which successfully pushed Motorola to develop products for wireless communication that would be small enough for use outside of your home, office or car and has participated in the design of cellular phones. Using a modern, if somewhat heavy portable handset, Cooper made the first call on a mobile cell phone, April 3, 1973 to a rival, Dr. Joel S. Engel of Bell Labs.
Analog cellular (1G)
Main article: 1G
The first commercial automated cellular network (the 1G generation) was launched in Japan by NTT in 1979. The initial launch of the network covered the entire Tokyo metropolitan area more than 2.