Who invented radio?

Answer 1

Several men were involved in the invention of radio.The controversy over who invented the radio, with the benefit of hindsight, can be broken down as follows:
***Heinrich Hertz had proved that the properties of radio waves were consistent with Maxwell’s electromagnetic theory.
***Nikola Tesla developed means to reliably produce radio frequenciesHe holds the US patent for the invention of the radio, as defined as "wireless transmission of data."
***Alexander Stepanovich Popov, in 1894, built his first radio receiver.
***Guglielmo Marconi was an early radio experimenter and founded the first commercial organization devoted to the development and use of radio.
***Jagdish Chandra Bose, demonstrated publicly the use of radio waves in Calcutta.
***Reginald Fessenden and Lee de Forest invented amplitude-modulated (AM) radio.
***Edwin H. Armstrong invented frequency-modulated (FM) radio.

Answer 2

The identity of the original inventor of radio, at the time called wireless telegraphy, is contentious. The controversy over who invented the radio, with the benefit of hindsight, can be broken down as follows:

Nikola Tesla developed means to reliably produce radio frequencies, publicly demonstrated the principles of radio, and transmitted long-distance signals. He holds the US patent for the invention of the radio, as defined as "wireless transmission of data."
Alexander Stepanovich Popov, in 1894, built his first radio receiver, which contained a coherer. Further refined as a lightning detector, he presented it to the Russian Physical and Chemical Society on May 7, 1895.
Guglielmo Marconi was an early radio experimenter and founded the first commercial organization devoted to the development and use of radio.
Reginald Fessenden [1] and Lee de Forest invented amplitude-modulated (AM) radio, so that more than one station can send signals (as opposed to spark-gap radio, where one transmitter covers the entire bandwidth of the spectrum).
Edwin H. Armstrong invented frequency-modulated (FM) radio, so that an audio signal can avoid "static," that is, interference from electrical equipment and atmospherics.
Early radios ran the entire power of the transmitter through a carbon microphone. While some early radios used some type of amplification through electric current or battery, until the mid 1920s the most common type of receiver was the crystal set. In the 1920s, amplifying vacuum tube radio receivers and transmitters came into use.

ref:
http://en.wikipedia.org/wiki/Radio
http://en.wikipedia.org/wiki/Invention_of_radio

Regards

Ramesh
The Human Search Engine
http://www.lluwanted.com

Answer 3

Nikola Tesla developed means to reliably produce radio frequencies, publicly demonstrated the principles of radio, and transmitted long-distance signals. He holds the US patent for the invention of the radio, as defined as "wireless transmission of data."
Alexander Stepanovich Popov, in 1894, built his first radio receiver, which contained a coherer. Further refined as a lightning detector, he presented it to the Russian Physical and Chemical Society on May 7, 1895.
Guglielmo Marconi was an early radio experimenter and founded the first commercial organization devoted to the development and use of radio.
Reginald Fessenden [1] and Lee de Forest invented amplitude-modulated (AM) radio, so that more than one station can send signals (as opposed to spark-gap radio, where one transmitter covers the entire bandwidth of the spectrum).
Edwin H. Armstrong invented frequency-modulated (FM) radio, so that an audio signal can avoid "static," that is, interference from electrical equipment and atmospherics.

Answer 4

MARCONI Guglielmo 1874-1937.: Italian engineer and inventor who in 1901 transmitted long-wave radio signals across the Atlantic Ocean. He shared the 1909 Nobel Prize in physics.

Answer 5

-----Nikola Tesla------

With his newly created Tesla coils, the inventor soon discovered that he could transmit and receive powerful radio signals when they were tuned to resonate at the same frequency. When a coil is tuned to a signal of a particular frequency, it literally magnifies the incoming electrical energy through resonant action. By early 1895, Tesla was ready to transmit a signal 50 miles to West Point, New York... But in that same year, disaster struck. A building fire consumed Tesla's lab, destroying his work.

The timing could not have been worse. In England, a young Italian experimenter named Guglielmo Marconi had been hard at work building a device for wireless telegraphy. The young Marconi had taken out the first wireless telegraphy patent in England in 1896. His device had only a two-circuit system, which some said could not transmit "across a pond." Later Marconi set up long-distance demonstrations, using a Tesla oscillator to transmit the signals across the English Channel.

Tesla filed his own basic radio patent applications in 1897. They were granted in 1900. Marconi's first patent application in America, filed on November 10, 1900, was turned down. Marconi's revised applications over the next three years were repeatedly rejected because of the priority of Tesla and other inventors.

The Patent Office made the following comment in 1903:

Many of the claims are not patentable over Tesla patent numbers 645,576 and 649,621, of record, the amendment to overcome said references as well as Marconi's pretended ignorance of the nature of a "Tesla oscillator" being little short of absurd... the term "Tesla oscillator" has become a household word on both continents [Europe and North America].

But no patent is truly safe, as Tesla's career demonstrates. In 1900, the Marconi Wireless Telegraph Company, Ltd. began thriving in the stock markets—due primarily to Marconi's family connections with English aristocracy. British Marconi stock soared from $3 to $22 per share and the glamorous young Italian nobleman was internationally acclaimed. Both Edison and Andrew Carnegie invested in Marconi and Edison became a consulting engineer of American Marconi. Then, on December 12, 1901, Marconi for the first time transmitted and received signals across the Atlantic Ocean.

Otis Pond, an engineer then working for Tesla, said, "Looks as if Marconi got the jump on you." Tesla replied, "Marconi is a good fellow. Let him continue. He is using seventeen of my patents."

But Tesla's calm confidence was shattered in 1904, when the U.S. Patent Office suddenly and surprisingly reversed its previous decisions and gave Marconi a patent for the invention of radio. The reasons for this have never been fully explained, but the powerful financial backing for Marconi in the United States suggests one possible explanation.

Tesla was embroiled in other problems at the time, but when Marconi won the Nobel Prize in 1911, Tesla was furious. He sued the Marconi Company for infringement in 1915, but was in no financial condition to litigate a case against a major corporation. It wasn't until 1943—a few months after Tesla's death— that the U.S. Supreme Court upheld Tesla's radio patent number 645,576. The Court had a selfish reason for doing so. The Marconi Company was suing the United States Government for use of its patents in World War I. The Court simply avoided the action by restoring the priority of Tesla's patent over Marconi.

Answer 6

Martine Aliana Rothblatt Ph.D, MBA, J.D. Very thrilling examine. Sirius became invented first. XM became in basic terms obtainable first. yet that's who you may credit with the invention of all satellite tv for pc radio. And sure, she was once a HE.

Answer 7

James Clerk Maxwell theorized electromagnetic waves and formulated the equations describing their behavior. Heinrich Hertz proved the existence of electromagnetic waves in the laboratory. Guglielmo Marconi put electromagnetic waves to practical use with his wireless telegraph.

Answer 8

the base of radio is tesla coils,,,,,,,,,,,
and tesla coils are invented by Nicola Tesla
even Wb/m^2 is also denoted as Tesla

nowadays which we use is modern radio but,,,,,,,, the base of is invented by nicola tesla

Answer 9

Jan Morsehead

Answer 10

Dan Quayle. He invented radio, tv's, vcr's, the internet, and pc's. Oh yeah he also invented the frisbee, the hula hoop, and the wheel. He's that good.