In fact, going back, we will find that the concept of mobile phone appeared as early as 1940s. At that time, the trial production was started by Bell Laboratories, the largest communication company in the United States. 1946, Bell Laboratories manufactured the first so-called mobile phone. But because of its large size, researchers can only put it on the shelf in the laboratory, and people will gradually forget it. Until the end of 1960s, in&; Two companies, T and Motorola, became interested in this technology. At that time, at & amp； T Rent a large mobile radiotelephone, which customers can install on the truck. At&T Company. T's vision is to develop a mobile phone with the power of 10 watt in the future, and use the radio equipment on the truck to communicate.
Cooper thinks this kind of mobile phone is too big and heavy to move and carry. Therefore, Motorola filed an application with the Federal Communications Commission, requesting that the power of mobile communication equipment can only be one watt, and the maximum power cannot exceed three watts. In fact, the maximum radio power of most mobile phones today is only 500 MW. From 1973 to 1985, the first modern mobile phone was born. It puts the power supply and antenna in a box, weighing 3 kilograms, which is very heavy and inconvenient. Users must carry it like a backpack, so it is called a "shoulder phone". Similar-looking mobile phones were born in 1987. Compared with the "shoulder phone", it is much lighter and easier to carry. Nevertheless, it still weighs about 750 grams, which is like a big brick compared with the mobile phone that weighs only 60 grams today. Since then, the development of mobile phones has become more and more rapid. 199 1 year, and the weight of the mobile phone is about 250g; 1in the autumn of 996, a mobile phone with a volume of 100 cubic centimeter and a weight of 100 gram appeared. Since then, it has been further miniaturized and lightweight, and 1999 has been lighter than 60 grams. In other words, a mobile phone is not much heavier than an egg. Modern mobile phones have become more and more like a multi-functional Swiss army knife, except for their smaller mass and volume. In addition to the most basic calling functions, the new mobile phone can also be used to send and receive emails and text messages, surf the Internet, play games, take photos and even watch movies! This was unexpected by the original mobile phone inventor.
It was American marty cooper who first invented the mobile phone.
In China in the 1990s, holding a cell phone or pager was absolutely awesome.
So far, our smartphones and 4G networks have all originated from the power of their technologies.
The inventor of the mobile phone is marty cooper:
Marty cooper (English: martin lawrence cooper,1928 65438+February 26th), born in Chicago, Illinois, USA, is a famous inventor. He is called the father of mobile phones because he was the first person to develop mobile phones. 1950, obtained a master's degree from Illinois Institute of Technology. At that time, Cooper was an engineer of the famous Motorola company in the United States. After working in Motorola for 29 years, he founded his own communication technology research company in Silicon Valley.
By the way, a few more questions, generators, movies, televisions, computers, electric lights, telephones, electric fans, rice cookers, induction cookers, electronic scales, welding, batteries, airplanes, trains, cars, motorcycles, ships, cameras, video cameras, sewing machines, looms, cement, plastics, chemical fibers, bulldozers, excavators, tractors, harvesters. . . . . Too many. Who invented them? Apart from these inventions, we are no different from 300 years ago.
Martin and Cooper are the fathers of mobile phones.
In fact, the mobile phone was originally a communication tool on the rocket, but it was not really developed. Accidentally found that it was applied to radio communication and became a mobile phone. Those inventors discovered it later, but at first they discovered it by accident.
I was just about to ask! If you have time, take a good look at your friends' answers and increase your knowledge.
marty cooper
Marty cooper (English: martin lawrence cooper,1928 65438+February 26th), born in Chicago, Illinois, USA, is a famous inventor. He is called the father of mobile phones because he was the first person to develop mobile phones.
1On April 3rd, 973, at Motorola Laboratories in Manhattan, new york, Martin Cooper, the leader of the research team, held their research achievement-the world's first mobile phone. Call Yule Engel, the R&D competitor of Bell Labs.
Cooper has the world's first mobile phone Dyna TAC in his hand. Compared with the current mobile phone, this mobile phone is cumbersome and chaotic-there are 30 internal circuit boards, and the talk time is only 35 minutes, while the charging time is 10 hour, and it only has two functions: making and answering calls. But at that time, the birth of this mobile phone meant the beginning of a new era-the birth of wireless communication.
Looking back at history, mobile phones have changed people's daily lives the fastest. Mobile phones have changed our cognition of possibilities and even changed our way of thinking. Now it can let us know everything at any time, and the whole world is at your fingertips in an instant, and it has only developed for ten years. In the 1990s and 2000, smartphones had far fewer functions than they do now. They can only make phone calls and have a basic file manager. In the following years, simple photo function and very basic online function appeared. What is the first mobile phone that can only make calls among these original mobile phones? Where did it come from? Who invented it?
Cell phones existed in the 1960s, but only in cars. If you want to have one, you must be a leader or a successful person in the town. Installing telephones on vehicles is the only way to make them move. This is because the mobile phone needs a lot of electricity to run, and only the car battery can support it. Another disadvantage is that there are only twelve channels in a given area. So most of the time you have to wait for the internet, and it may take 30 minutes just to connect to a phone. This is it.
Until 1968, the Federal Communications Commission asked AT&T to solve this problem. Later, AT&T proposed a mobile phone architecture, aiming at dividing a large coverage area into smaller areas. So many people can use their mobile phones in the car at the same time. When the vehicle moves from one unit to another, the advanced electronic equipment called mobile telephone exchange in the central position transfers the telephone to another unit through telephone lines.
At the same time, Motorola has a car phone department and doesn't want AT&T to monopolize its products. So they decided to develop a mobile phone to take advantage of this new technology, and invited a man named marty cooper to lead the research and development of this project. He started this project in 1972, and Martin is counting on a brand-new technology to realize this vision, that is, microprocessor. This is a microchip, which can do many things like car phone components. It takes up less space and consumes less power. By March 1973, Cooper and his team had completed a working prototype. 1On April 3rd, 973, Martin introduced the Motorola DynaTAC mobile phone at the press conference in new york. After years of development, Motorola introduced the first portable mobile phone to consumers in 1983, which is Motorola DynaTAC 8000x mobile phone. The weight is about 1 kg, because many batteries are needed to drive it. It takes ten hours to fully charge a battery, but it only provides 30 minutes of talk time for the mobile phone. Most importantly, after adjusting the inflation dollar exchange rate, its price is almost $65,438+0,000. But this phone started the mobile phone revolution.
Back to 1973, when Martin first called, there was only one real mobile phone in the world. Now there are more mobile phones than people, so what is Martin doing now? At the age of 88, he became a member of the Federal Communications Commission and supported the US Department of Commerce.
Dear friends, Mr. Martin and Mr. Cooper invented the world's first mobile phone at Motorola in 1973. After more than 20 years of research and development and marketing, mobile phone has become the most popular portable communication dispute in the world. Mr. Cooper has also become the father of mobile phones in the industry.