History on cell phones

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history on cellphones by kevin and madison hehe

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History on cell phones

  1. 1. History of Cell Phones<br />BY: Kevin & Madison<br />
  2. 2. History<br />The history of cell phones from the early days of 1920’s, a period during which radios were emerging as effective communication devices. <br />
  3. 3. History II<br />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.<br />
  4. 4. First use of Cell Phones<br />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.<br />It was very similar to the two-way radio phone that was used in cars for portable communication.<br />
  5. 5. First used Cell Phone<br />
  6. 6. Evolution of Modern Cells<br />Rising from this type of communication technology, the evolution of modern cell phones began in 1947.<br />
  7. 7. Cell Towers<br />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. <br />
  8. 8. Cell Towers II<br />Before the cell towers, cell phones only worked in two directions and through an antenna.<br />
  9. 9. Electronic Components<br />The electronic components used in cell phones of today’s generation were first developed in the 1960s.<br />
  10. 10. Cell Service<br />The problem that persisted during that time was the user was restricted to a certain block of areas, which were called cell areas.<br />
  11. 11. Pictures<br />
  12. 12. Pictures<br />
  13. 13. Cellphone Facts<br />About 22% of American teenagers (more girls than boys) own a cellphone.<br />You can locate anyone using a cellphone. <br />
  14. 14. Cellphone Facts II<br />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.<br />
  15. 15. Martin Cooper<br /> Martin Cooper was born December 26, 1928. <br /> He was born in Chicago, Illinois. <br />He was a Motorola CEO, and founder of ArrayComm <br />
  16. 16. References<br />www.tech-faq.com/history-of-cell-phones.html<br />http://www.historyofcellphones.net/<br />Google Images<br />http://www.cell-phone-numbers.com/cell-phone-facts.htm<br />http://en.wikipedia.org/wiki/Martin_Cooper_(inventor)<br />

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