Statements (63)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
electronic component
|
| gptkbp:canLeadTo |
mechanical tap
|
| gptkbp:composedOf |
metal filings
|
| gptkbp:developedBy |
Guglielmo Marconi
|
| gptkbp:firstHeld |
1890s
|
| gptkbp:function |
detecting radio signals
|
| gptkbp:hasCitations |
temperature sensitivity
|
| gptkbp:hasRelatedPatent |
early radio technology
|
| https://www.w3.org/2000/01/rdf-schema#label |
Coherer
|
| gptkbp:inventor |
gptkb:Edgar_F._Johnson
|
| gptkbp:isAssociatedWith |
early radio experiments
early wireless pioneers wireless telegraphy development |
| gptkbp:isAvenueFor |
early detection technology
|
| gptkbp:isChallengedBy |
modern semiconductor devices
|
| gptkbp:isConnectedTo |
transmission line
signal processing equipment antenna system ground system |
| gptkbp:isConsidered |
obsolete technology
a precursor to modern detectors an important invention in radio technology first radio detector |
| gptkbp:isFoundIn |
historical radio equipment
|
| gptkbp:isInfluencedBy |
electromagnetic theory
advancements in electronics |
| gptkbp:isNotedFor |
its historical significance
its simplicity its role in signal detection its role in the development of radio technology |
| gptkbp:isPartOf |
wireless communication systems
radio receiver early communication systems early radio history early radio transmitters historical radio projects |
| gptkbp:isRelatedTo |
Marconi's_experiments
|
| gptkbp:isStudiedIn |
radio frequency signals
|
| gptkbp:isTrainedIn |
engineers
laboratory experiments practical applications scientists field conditions |
| gptkbp:isUsedBy |
hobbyists
|
| gptkbp:isUsedFor |
signal reception
|
| gptkbp:isUsedIn |
historical texts
scientific research amateur radio historical demonstrations educational experiments demonstrations of radio waves historical radio demonstrations |
| gptkbp:isVisitedBy |
environmental factors
|
| gptkbp:madeOf |
conductive materials
|
| gptkbp:operatesIn |
electromagnetic waves
|
| gptkbp:relatedTo |
wireless telegraphy
|
| gptkbp:replacedBy |
crystal detector
|
| gptkbp:requires |
external circuit
|
| gptkbp:sensors |
high
|
| gptkbp:type |
detector
|
| gptkbp:usedIn |
radio communication
|
| gptkbp:wasPartOf |
early 20th century
|
| gptkbp:worksOn |
changing resistance
|