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)