Historical Development of the Mobile Phone

Inventor of the first mobile phone system is Martin Cooper, a Motorola factory worker on April 3, 1973, although often touted inventor of mobile phones is a team from one division of Motorola (a division of Cooper's work) with the first model is the DynaTAC. The idea hatched by Cooper is a communication tool that small and easy to carry travel flexibly.  

 

Cooper and his team face the challenge of how to incorporate all electronic material into such a small device for the first time. Finally a first mobile phone was successfully completed with a total weight of weighing two kilograms. To make, manufacturer Motorola will cost approximately $ 1 million. "In 1983, the portable cell phone worth $ 4 thousand (Rp36 million) equivalent to $ 10 thousand (Rp90 million).  

After successfully producing the cell phone, the next biggest challenge is adapting the infrastructure to support the communication system of the mobile phone by creating a network system that only requires 3 MHz spectrum, the equivalent of five TV channels are channeled to the rest of the world.
Other figures are known to be very instrumental in the world of mobile communications is Amos Joel Jr. who was born in Philadelphia, March 12, 1918, he was recognized worldwide as an expert in the field of switching. 

 

He received a bachelor's degree (1940) and master's (1942) in electronic engineering from MIT. Not long after the studies, he began his career over 43 years (from July 1940-March 1983) at the Bell Telephone Laboratories, where he received more than 70 patents in the field of telecommunication America, particularly in the field of switching.  

Amos E Joel Jr., making the system connector (switching) cell phone from one region to another region of the cell. This switching should work when mobile users move or move from one cell to another cell so that the conversation is not interrupted. Since the discovery of this Joel Amos cell phone use be comfortable.

source : wikipedia

Continue Reading