In the year , Ericsson Company managed to release the earliest completely automatic cellular phone system called the MTA in Sweden. This device was operated automatically; however, due to its weight, it failed to hold the interest of the users for long. Later in , an improved and a lighter version of the same phone was introduced. Leonid Kupriyanovich, a Russian engineer, developed an experimental model of wearable mobile phones in Moscow in the year These devices operated with the help of a base station.
Kupriyanovich had earlier developed LK-1, a radio phone. The battery life of the wearable mobile phone invented lasted for nearly hours. It weighed around 3 kg and worked within a distance of 20 to 30 km from the base station. In the same year, the young engineer patented the mobile phones and came up with a version of a pocket mobile phone that weighed just 0. Further Developments in the Cellular Field. In , an automatic pocket mobile phone called RAT It was then decided that every cellular phone would be catered to a base station throughout its life.
Later in , another engineer named Ames E. Joel invented automatically operated call hand-off technology. This allowed the mobile phones to pass through cell areas while making a call without any loss of conversation. This was probably the first time when a mobile user was able to use the device without any disturbance. The Birth of the Portable Mobile Phone.
In the s, Bell Labs developed the technology that could support the design of a cellular network proposed by Young. As these two were trying to win the race, a competitor made a bold and cheeky move in ! That competitor was Martin Cooper who was an executive with Motorola.
Cooper led a team that designed the first practical cell phone, resembling the one that we use today. With recharge time of around 10 hours, talk time of 35 minutes, this mobile phone gave a comfortable talking experience to its users. It also accounted for handoffs , which is when a caller moves from one tower's broadcast radius to another.
But though the theory was sound, the technology to make it happen was lacking. It would take more than 10 years for the next development. These devices were primitive compared to today's cell phones and resembled walkie-talkie transceivers. Only a few calls -- sometimes as few as three -- could be made on the system at a time. Callers would sometimes have to wait for another conversation to end before completing a call, which also meant that private conversations were practically impossible.
The phones were expensive and some weighed up to 80 pounds By the s, Bell Labs engineers Richard H. Frenkiel and Joel S. Engel developed the technology that could support Young's design of a cellular network. Cooper led a team that designed the first practical cell phone. Cooper decided to make one of the first cellular telephone calls to professional rival Joel Engel at Bell Labs.
That's right -- the first cell phone was involved in what some might refer to as a prank call! But all of these developments were put to use developing mobile phones in automobiles. It would take an upstart to give us the first hand-held cell phone, as we know it today. They had spent much of their efforts developing what we used to call the car phone.
The reason we don't all have car phones today was because of the work of a small company called Motorola, and a man named Marty Cooper. Build it they did. On April 3, , before stepping into a news conference in Manhattan to demonstrate the new device that would go on to revolutionize communications, Cooper tested it by placing the first public cellular phone call in history.
A portable handheld telephone. They had taken on a company that at that time exercised monopoly power over American telephone systems. As for whether Cooper accepted the title given to him by history, Father of the Cell Phone, he felt that the honor should be shared.
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