Statements (29)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Antenna
|
| gptkbp:bannedIn |
most countries after 1920s
|
| gptkbp:component |
gptkb:keyboard
Antenna capacitor spark gap early radio stations induction coil |
| gptkbp:emits |
broadband radio noise
|
| https://www.w3.org/2000/01/rdf-schema#label |
spark gap transmitter
|
| gptkbp:inventedBy |
gptkb:Guglielmo_Marconi
gptkb:Nikola_Tesla |
| gptkbp:notableExample |
gptkb:Marconi's_transatlantic_transmission
|
| gptkbp:operates |
generating radio frequency oscillations
using an electric spark |
| gptkbp:output |
damped waves
|
| gptkbp:powerSource |
high voltage supply
|
| gptkbp:reasonForObsolescence |
inefficiency
broadband emissions interference with other radio services |
| gptkbp:regulates |
early radio regulations
|
| gptkbp:replacedBy |
vacuum tube transmitter
|
| gptkbp:usedBetween |
1887
1920s |
| gptkbp:usedFor |
Morse code transmission
|
| gptkbp:usedIn |
radio communication
early wireless telegraphy |
| gptkbp:bfsParent |
gptkb:Hertzian_waves
|
| gptkbp:bfsLayer |
5
|