Mobile Phones
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Wireless Communication

Who invented mobile phones?

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2017-08-16 06:45:45

Dr. Martin Cooper of motorola invented the mobile phone and made

the world's first mobile phone call on April 3rd, 1973.


The mobie phone was made by the Motorola company. it was invented

by Dr Martin Cooper. the first moble phone weighed around 2kgs and

its battery lasted only for ten minutes.

The cell phone started as police radios in the 1920's and was

developed by Bell Labs in 1947. Martin Cooper in 1973 made the

first cell phone as we know it, but it wasn't used by the public

until 1983.

Martin Cooper working at Motorola in 1970 invented the

handheld portable cellphone.

The cellphone was first invented at Bell Labs in 1947 by

Douglas H. Ring, et. al. who spelled out in an internal memo

the complete requirements for a cellphone system. However

the technology of that time was obviously inadequate to meet these

requirements, so neither Bell Labs nor the parent company AT&T

made any attempt then to build hardware or license radio

bandwidth.

By the late 1960s though AT&T decided the technology was

nearly ready and in 1969 began negotiation with the FCC for radio

bandwidth for their cellphone system. However neither Bell Labs nor

AT&T seriously considered that it might be possible to build a

working cellphone smaller than a box that would fill most of the

trunk of a car (like the then available AT&T car radio phone

did).

These 1969 AT&T/FCC negotiations prompted Cooper to think of

a better way to make a cellphone as a possible way to break some of

AT&T's total monopoly over telecommunications at the time,

resulting in his 1970 invention. However Cooper's handheld portable

cellphones could not work without the cell towers and call

management techniques of Ring's original cellphone system.

Dr. Martin Cooper invented the first mobile

phone.

Dr. Cooper may have invented the idea for the first commercial

mobile phone, but the first actual working handheld cell phone was

built by Oren Verble, a Kennedy Space Center rocket tech. I saw it

work.

What Oren did was install a high powered walkie talkie on top of

a water tank tower and he wired it to a land phone line. He took

the matching walkie talkie and attached a touch-tone keypad to the

front of it. I saw this actual device and I saw him place one of

the first cell phone calls ever made in history - it was the

1970's

I know this for a fact, I was there.

Updated by Al Schrader April 6, 2014

Bell Labs in 1948 made the first prototype of the cell phone. The

Cooper phone (invented by Martin Cooper) is most like the one we

have today so is considered the first. The idea of a cell phone

started as early as the 1920's when radios were used by the police.

It wasn't until 1984 that the first cell phones were sold to the

public. Until that time they were only in use by government

agencies.

Although phones were used in cars, almost as soon as radio was

invented, they were not cell phones in the true sense. Early car

phones communicated to a single base station and most needed an

operator to connect the calls. Cell phones were only possible when

computers could be incorporated into the handset. Cell phones

communicate via many small land based transmitters, or cells.

The phone has to automatically log onto a cell, check

validation, change channel, change output power, all without

intervention or knowledge of the user. Motorola did a lot of the

research in the 1980's. Some of the innovation and technology was

developed by radio amateurs developing packet radio.

Doctor Martin Cooper

Martin Cooper (and team) made the first cell phone while working

for Motorola in 1973.

The mobie phone was made by the Motorola company. it was invented

by Dr Martin Cooper. the first moble phone weighed around 2kgs and

its battery lasted only for ten minutes.

_________________________________________________________________

The first hand-held mobile (or cell phone) was demonstrated by

John F. Mitchell and Dr Martin Cooper of Motorola in 1973, using a

handset weighing around 2.2 pounds (1 kg). In 1983, the DynaTAC

8000x was the first to be commercially available.

Dr. Martin Cooper invented the first mobile

phone.

Dr. Cooper may have invented the idea for the first commercial

mobile phone, but the first actual working handheld cell phone was

built by Oren Verble, a Kennedy Space Center rocket tech. I saw it

work.

What Oren did was install a high powered walkie talkie on top of

a water tank tower and he wired it to a land phone line. He took

the matching walkie talkie and attached a touch-tone keypad to the

front of it. I saw this actual device and I saw him place one of

the first cell phone calls ever made in history - it was the

1970's

I know this for a fact, I was there.

Updated by Al Schrader April 6, 2014

Bell Labs in 1948 made the first prototype of the cell phone. The

Cooper phone (invented by Martin Cooper) is most like the one we

have today so is considered the first. The idea of a cell phone

started as early as the 1920's when radios were used by the police.

It wasn't until 1984 that the first cell phones were sold to the

public. Until that time they were only in use by government

agencies.

Although phones were used in cars, almost as soon as radio was

invented, they were not cell phones in the true sense. Early car

phones communicated to a single base station and most needed an

operator to connect the calls. Cell phones were only possible when

computers could be incorporated into the handset. Cell phones

communicate via many small land based transmitters, or cells.

The phone has to automatically log onto a cell, check

validation, change channel, change output power, all without

intervention or knowledge of the user. Motorola did a lot of the

research in the 1980's. Some of the innovation and technology was

developed by radio amateurs developing packet radio.

Dr. Martin Cooper

Any history of cell phones starts with Samuel Morse. He conceived

of an electromagnetic telegraph in 1832 and constructed an

experimental version in 1835. Then, on October 18, 1842, Morse laid

wires between Governor's Island and Castle Garden, New York, with

the distance of a mile. Part of that circuit was under water

because Morse wanted to show that an underwater cable could

transmit signals as well as a copper wire suspended on poles. But

before he could complete this demonstration a passing ship pulled

up his cable, ending, it seemed, his experiment. However,

undaunted, Morse proceeded without the cable, passing his telegraph

signals through the water itself. This introduced the concept of

wireless by conduction. Quite simply, Samuel Morse's telegraph was

the first device to send messages by electricity. So now there was

the know-how to send messages. And the possibilities of exactly how

to do this were abounding. Now it was known that water could

conduct electricity and carry messages, other conductors were

sought out.

In 1843, a skilled analytical chemist by the name of Michael

Faraday began exhaustive research into whether space could indeed

conduct electricity, using the principles already established by

telegraphy. In 1864, James Clerk Maxwell released his paper

"Dynamical Theory of the Electromagnetic Field" which concluded

that light, electricity, and magnetism, were all related. All of

these worked hand in hand, and all electromagnetic phenomena

traveled in waves. Then, in 1865, Dr. Mahlon Loomis of Virginia, a

dentist, may have been the first person to communicate through

wireless via the atmosphere. Between 1866 and 1873 he transmitted

telegraphic messages at a distance of 18 miles between the tops of

Cohocton and Beorse Deer Mountains in Virginia. He developed a

method of transmitting and receiving messages by using the Earth's

atmosphere as a conductor and launching kites enclosed with copper

screens that were linked to the ground with copper wires.

Over the next thirty years, most inventors and developers

concentrated on wire line telegraphy, suspending wires between

poles, which eventually became what we know as telephone poles. Few

tinkered exclusively with wireless since a basic radio theory had

not yet been worked out. Several experiments conducted on a trial

and error basis produced no results. Telegraphy, however, did

produce a good understanding of wireless by induction since wires

ran parallel to each other and often induced rogue currents into

other lines. So now they knew that electromagnetic messages could

travel through the air. Then along came another man with a vision -

Martin Cooper, known by many as the father of the cellular phone.

Hired by Motorola in 1954, Mr. Cooper worked on developing portable

products, including the first portable handheld police radios, made

for the Chicago police department in 1967. He then led Motorola's

cellular research. In the meantime, AT&T's research arm, Bell

Laboratories, introduced the idea of cellular communications in

1947. But Motorola and Bell Labs in the sixties and early seventies

were in a race to incorporate the technology into portable

devices.

Martin Cooper won that race! Cooper set up a base station in New

York with the first working prototype of a cellular telephone, the

Motorola Dyna-Tac (see picture below). After some initial testing

in Washington for the Federal Communications Commission (FCC), Mr.

Cooper and Motorola took the phone technology to New York to show

the public. On April 3, 1973, at a public demonstration and using a

heavy 30-ounce phone, Martin Cooper placed the first cell phone

call to his rival at AT&T Bell Labs from the streets of New

York City. Mr. Cooper commented, "As I walked down the street while

talking on the phone, sophisticated New Yorkers gaped at the sight

of someone actually moving around while making a phone call.

Remember that in 1973, there weren't cordless telephones or

cellular phones. I made numerous calls, including one where I

crossed the street while talking to a New York radio reporter -

probably one of the more dangerous things I have ever done in my

life."

THE FIRST CELL PHONE!

First Cell Phone (1973): Motorola Dyna-Tac

The size of the phone was 9 x 5 x 1.75 inches , the weight of

the very first phone weight at 2.5 pounds ,the phone of 1973 had no

kinds of display because in their time they did not have the

advanced type of technology that we have , the amount of Talk time

the phone had was a total of 35 minutes also it took a total of 10

hours for the phone to fully recharge. The features of the phone

were only talk, listen, and dial. This first cell phone call caused

a fundamental technology and communications

by:jada ruth

It was April 3, 1973. Richard Nixon was in power, Elton John was

top of the pop charts and a bloke by the name of Martin Cooper was

about to make a phone call that would change the world. Cooper

worked for what was then a little-known company called Motorola and

he had just developed the world's first "hand-held cellular

telephone''. "It was huge,'' recalls Cooper, who was in Sydney this

week to address a communications conference. "The phone weighed

almost two kilos - it was about the size of a brick.''

If that sounds prehistoric, so too was the phone's power

efficiency.

"The battery lasted somewhere between 10 and 20 minutes. But

that didn't matter very much because you could only hold it up to

your ear for 10 minutes before your arm got tired,'' he says.

Cooper knew the first call he ever made on that state-of-the-art

phone would be a moment of history. So who did he call on that

April day from a Manhattan street corner? He rang the

communications Joel Engel, the head of research at Bell Labs, an

arms of the telecommunications giant AT&T - Motorola's direct

competitor - to let them know he had beaten them in the race to

make the first mobile phone. "It was one of the more chilling

conversations that I've ever held. These people at AT&T could

not understand how a little upstart, a tiny company like Motorola,

would dare to tell them, the largest company in the world, how to

run their business. "I thought I heard some gnashing of teeth in

the background,'' jokes Cooper. At the time, the thought millions

of people around the world owning their own mobile seemed like a

pipe dream to Cooper. "Keep in mind that the first [mobile]

telephone cost millions of dollars to make. Ten years later we

produced the first commercial phones and those phones sold for

US$4000 [$A5180], which would be closer to US$10,000 or US$15,000

today. "So the idea of having a billion and a half people having

cell phones - some of which are literally given to them for nothing

- was a really long reach.'' And is there ever a time when the man

who made the mobile wants to tell mobile phone users to shut up?

"It depends whether they are being rude or not. If they're talking

quietly and they are benefiting from that phone call, I feel very

proud because I think people's lives have been improved.''

awadhesh thakkar


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