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| RADIO |
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TECHNOLOGY DEVELOPMENT
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| 1864 |
| Theory
of electromagnetic waves |
| James
Clerk Maxwell |
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| 1884 |
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Detector
of electromagnetic waves (coherer) |
| Temistocle
Calzecchi Onesti |
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| 1887 | | Experimentation
electromagnetic waves |
| Heinrich
Rudolph Hertz |
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| 1888 |
| Detector
of electromagnetic waves (coherer) |
| Désiré
Edouard Branly |
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| 1895 | | Wireless
Telegraphy |
| Guglielmo
Marconi |
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| 1898 |
| Detector of
electromagnetic waves (coherer) |
| Oliver
Joseph Lodge |
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| 1901 |
| Detector crystal of Galena (diode to galena) |
| Jagadis
Chunder Bose |
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| 1904 |
| Diode |
| John
Ambrose Fleming |
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| 1906 | | Detector crystal silicon |
| Greenleaf
Whittier Pickard |
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| 1906 | | Detector
crystal of carborundum |
| Henry
Harrison Chase Dunwoody |
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| 1906 | | Radio AM
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AMPLITUDE MODULATION) |
| Reginald
Aubrey Fessenden
Lee De
Forest |  |
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| 1906 |
| Amplifier -Triode
(audion) |
| Lee
De Forest |
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| 1913 | | Circuits regeneration or Receiver
jet |
| Edwin
Howard
Armstrong |
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| 1918 |
| Superheterodine |
| Lucien
Levy |
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| 1933 | | Radio FM ( FREQUENCY MODULATION) |
| Edwin
Howard Armstrong |
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