Wel come

Another triumph of technology, mobile phone, a radio that connected to the world by storm.Cellular technology, however, a power base stations for a few square kilometers "cell" served as consumption. As a client from one cell to another, the phone switches from a weak to strong signal at a different frequency, thus maintaining a clear connection. Since the transmissions are low power, frequencies can be reused in adjacent cells in the same area with a capacity for thousands of participants.

The phone was in 1940 that the principles developed at Bell Labs, had to build these facilities, the integrated circuit in the 1970s and is awaiting the arrival of other microelectronic components. In the United States, companies have seen hundreds of the company's promise, but state regulators also have enough production available in a wide frequency band, the delay was slow in use.

 

Mobile

 

Consequently, Japan and Scandinavian countries made the first cellular systems and technology leader. First, there was room for improvement. Cars, especially in the beginning, installed on phones, portable version is a brick, which were as large as the cost of a thousand dollars, and had a battery life measured in minutes. But the magic of the microchip in the 1990s, pocket phone prices, energy demand fell off and filled with the powers of calculation. For the year 2000 in the United

States and worldwide 100 million people with cell phones and not just Arabs, but also games, the Internet for information, and text messaging keyboard, especially a young Japanese was a favorite pastime. Most households in countries where telephone, without China and India, even today, for example, the first and only call for many people is likely to be wireless. Finally, a network of Alexander Graham Bell's vision of a future world in which the whole world, is completely portable, personal communication.