Shulou(Shulou.com)11/24 Report--

At MWC2023, the GSMA presented Martin Copper with one of the most important GLOMO Global Mobile Awards for Lifetime Individual Achievement for his outstanding contributions to mobile communications. This great father of mobile phones has once again come to us. While paying tribute to his predecessors, let's get to know this great RF elder- Martin Copper.

After Maxwell predicted electromagnetic waves, Hertz verified their existence through spark experiments. How to use electromagnetic waves became a top priority for RF people, and Marconi brought radio to the real world. Although the Americans later rejected Marconi's famous patent No. 777 and awarded the final invention of radio to the famous Tesla, they still could not erase Marconi's outstanding contribution to wireless communication.

Similarly, when it comes to the inventor of the mobile phone, we have to introduce another equally great radio enthusiast, Nathan Stubblefield. This American farmer, a radio enthusiast, built the world's first mobile phone in 1902, but it had an antenna 120 feet tall in addition to being the size of a pot cover. This bulky portable radio phone is a bit cumbersome to hold in your hand.

Time came to Motorola Labs in 1973, Martin Copper and his colleagues developed the first mobile phone in hand to make the world's first call, we can not understand Martin Copper's mood at that time, but this epoch-making product opened our wireless era.

The first mobile phone you can hold in your hand is Dyna TAC, which has a household name in China-Mobile Phone. At that time, the mobile phone also became the standard for some people who became rich at the beginning of reform and opening up. Look, Brother Hua was using the mobile phone to make a phone call.

Compared with our current mobile phone, this mobile phone is comparable to the old brick in the brick world, weighing nearly one kilogram, the internal PCB is as much as 35 pieces, the call time is only 35 minutes, and the charging takes nearly 10 hours, and in addition to answering the phone, the other functions are only to exercise the arm strength and burst the pocket. Looking at the almost omnipotent smartphone, it is amazing how fast communication technology is developing.

Let's take a look at the history of the invention of the world's first mobile phone.

Martin Cooper said he was inspired to invent the phone by the TV series Star Trek."When I saw Captain Corker using a wireless phone, I immediately realized that this is what I wanted to invent. Martin Cooper was born in Chicago in 1928 and received his master's degree from the Illinois Institute of Technology in 1950. After graduation, Copper joined the United States Navy. After retirement, Martin Cooper, 29, began working in Motorola's personal communications division for 15 years. In 1973, AT&T invented a new concept called cellular communications. The so-called cellular communication is to use cellular wireless networking mode to connect terminals and network equipment through wireless channels, so as to realize that users can communicate with each other during activities.

Martin Cooper thinks it's a great idea,"but then AT&T decided that the cellular communication people needed was just 'in-car communication,' and we questioned that conclusion." We know that people don't want to talk to cars, houses, offices, but to people. To prove this, we intend to invent a cellular telephone to prove to the world that the idea of personal communication is correct. We believe that phone numbers correspond to people, not places. "

Captain Corker's wireless phone became the prototype for Martin Cooper and his team's invention of the mobile phone. "The task was urgent, and the company asked us to make a mobile phone model in six weeks. The FCC was considering whether to allow AT&T to build a mobile network and provide wireless service in the U.S. market; AT&T had its own plans for mobile phones. Motorola doesn't want to let big business opportunities slip away.

Three months later, the first mobile phone model was complete.

Martin Cooper held up their research, the world's first mobile phone, and excitedly asked,"My dear friends, I'm going to go out on the street and call someone with this phone. Guess who? "Your family? "Your friend? "There was speculation among those present. "No, you're all wrong. Cooper smiled mysteriously. Then he walked out of the lab and into the streets of Manhattan. Everyone who passed by him stopped and stared at the unwired phone in his hand. No one had ever seen a telephone without a cord before. As everyone watched, Cooper pressed a number. The call went through, and a man's voice came from the other end: "This is Joel Engel. "Copper said excitedly in an almost trembling voice,"Joel, I'm talking to you on a real mobile phone, a real mobile phone! "The phone was silent. It was none other than Joel Engel, a scientist at Bell Labs, Copper's longtime competitor.

We can't understand Martin Copper's mood at that time, nor can we feel Joel Engel's loneliness at that time. In terms of contribution to wireless technology, the two competitors are equally great.

Martin Copper's story also tells us not to give up imagination, let alone action, in the process of product development. There are dreams, there are actions, then there will be harvest.

From dialing the first mobile phone in 1973 to Motorola officially pushing the mobile phone to the market in 1983, Martin Copper led his R & D team through numerous proofing verifications and finally made the mobile phone less than 400g, and the call quality has also been greatly improved.

Technical excellence runs through this RF doyen's life.

The 95-year-old wireless doyen is still alive, and what's even more remarkable is that the great father of mobile phones never gave up on wireless innovation, founding ArrayComm at the age of 73, a leader in wireless systems antenna processing. ArrayComm's software provides significant improvements in coverage, capacity, data rate, and coverage quality for base stations and customer segment devices of various wireless communication protocols, as well as MIMO architectures.

ArrayComm, founded by Martin Cooper, focuses on the research and development of large-scale commercial-grade 5G core physical layer technologies, products and systems, and is committed to enabling the open 5G network equipment industry. It provides 5G (sub-6g and millimeter wave), 4GLTE, NB-IoT and Cat-M physical layer technologies suitable for macro base stations and small base stations to a number of large wireless equipment vendors, system integrators and operators at home and abroad. ArrayComm service includes baseband software (physical layer and L2 / L3 protocol stack), modules (DU, RU and extension unit), 4G/ 5G base station end-to-end system, physical layer link-level simulation platform (nr phy sim software), etc.

ArrayComm has a nice Chinese name-Airui Wireless, currently has branches in Xiamen and Chengdu.

Reference source:

htps://baike.baidu.com/item/%E9%A9%AC%E4%B8%81%C2%B7%

E5%BA%93%E5%

B8%95/3066905? fr=aladdin

https://baike.baidu.com/item/Dyna%20TAC/16939058? fromModule=lemma_inlink

https://m.uc23.net/lishi/73250.html

https://baike.baidu.com/link? url=unAekfsx3JYGrOBA2GnR9PCXIR2fDVPvaKiNIIop-QA-2-XdzExlgfs41_-HJ9Y6WhEUR2oK6RNBf6WQ_MxloD2ytVqrh9XE9rnj4aMa7z8vx3Mw_Fl6nL5RHIZZaqR0NJXyIbVCYAm0RuNU0YVhcZRxpCWu1XNb14Hg985OMhS

https://www.arraycomm.com/? ivk_sa=1024320u

This article comes from Weixin Official Accounts: RF School (ID: RF_Center), author: RF Little Carpenter

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