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Coherer

The coherer was a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the 20th century. Its use in radio was based on the 1890 findings of French physicist Édouard Branly and adapted by other physicists and inventors over the next ten years. The device consists of a tube or…

History & Applications

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Overview

History

Operation

Application

Imperfect junction coherer

Limitations of coherers

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Coherer

Nodes84
Edges83
Triples79
Avg. degree1.98
Density0.02381
Components1

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Coherer

Top relations

related to Further reading · 24
Coherer → Coherers, Cuff, Early Radio Wave Detectors, Electrical Engineers, Inst, ISBN, Lock-gray-alt-2, Lock-green, Lock-red-alt-2, London, Master's Thesis, Metal-Oxide-Metal, MOM, PA, Philadelphia, Phillips, RF, Scanning Tunneling Microscope, STM, Temple University
related to External links · 19
Coherer → Adolphus, April, Hirakawa Institute, Japan, Marconi Calling Company, Pages, Receiver, Recent, ShareAPic, Slaby, Technology, Tesla's US Patent, The Century Magazine, The Coherer, The New Telegraphy, Virtual, Web, Wireless, World
related to Imperfect junction coherer · 14
Coherer → An, Bose, By, Detector, He, In, Its, Jagdish Chandra Bose, London, Marconi, Royal Society, The, There, This
related to Operation · 12
Coherer → AM, As, DC, If, Morse, Specifically, The, Therefore, This, Unfortunately, Unlike, When
related to Application · 6
Coherer → B1, In, One, RF, Silver, The
related to Limitations of coherers · 2
Coherer → Because, Robert Marriott

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Important terminology

radio signal filings metal detector tube resistance would coherers particles electrical used device current electrodes two paper tape also circuit

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Fleming's oscillation valveinstance of1918 by vacuum tube technologies0.80text
Lee De Forest's Audioninstance of1918 by vacuum tube technologies0.80text
Cohererrelated to ApplicationThe0.60section
Cohererrelated to ApplicationSilver0.60section
Cohererrelated to ApplicationIn0.60section
Cohererrelated to ApplicationOne0.60section
Cohererrelated to ApplicationB10.60section
Cohererrelated to ApplicationRF0.60section
Cohererrelated to External linksWeb0.60section
Cohererrelated to External linksThe Coherer0.60section
Cohererrelated to External linksWorld0.60section
Cohererrelated to External linksWireless0.60section

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