Post on 26-May-2015
description
History of Cell Phones
BY: Kevin & Madison
History
• The history of cell phones from the early days of 1920’s, a period during which radios were emerging as effective communication devices.
History II
• The very first use of radio phones were in cars, using two way radio communication. Like any other electronic equipment, cell phones evolved over time.
First use of Cell Phones
• The first official cell phone was used by the Swedish police in 1946. They made it functional by connecting a hand held phone to the central telephone network.
• It was very similar to the two-way radio phone that was used in cars for portable communication.
First used Cell Phone
Evolution of Modern Cells
• Rising from this type of communication technology, the evolution of modern cell phones began in 1947.
Cell Towers
• An engineer from Bell Labs discovered cell towers which had the ability to not only transmit but to also receive the signals in three different directions.
Cell Towers II
• Before the cell towers, cell phones only worked in two directions and through an antenna.
Electronic Components
• The electronic components used in cell phones of today’s generation were first developed in the 1960s.
Cell Service
• The problem that persisted during that time was the user was restricted to a certain block of areas, which were called cell areas.
Pictures
Pictures
Cellphone Facts
• About 22% of American teenagers (more girls than boys) own a cellphone.
• You can locate anyone using a cellphone.
Cellphone Facts II
• Cell phones are more popular in Europe than they in the United States with more than 60 percent of Europeans owning a cell phone; compared to about 40 percent of Americans owning a cell phone.
Martin Cooper
• Martin Cooper was born December 26, 1928. • He was born in Chicago, Illinois. • He was a Motorola CEO, and founder of
ArrayComm
References
• www.tech-faq.com/history-of-cell-phones.html • http://www.historyofcellphones.net/ • Google Images• http://
www.cell-phone-numbers.com/cell-phone-facts.htm
• http://en.wikipedia.org/wiki/Martin_Cooper_(inventor)