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coherer    
n. 粉末检波器

粉末检波器


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  • Coherer - Wikipedia
    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
  • How a Coherer Works, Basic Principle - YouTube
    The coherer was the first radio detector Although there were coherers before Marco Basic principle of how it works explained in 1 minute by Dr Pier Abetti
  • Coherer - Engineering and Technology History Wiki - ETHW
    Radioconduction, channeled through Branly’s “coherer,” transformed the development of wireless telegraphy Within a little more than a decade, Guglielmo Marconi would send the first wireless communication across the Atlantic
  • The Coherer, May 1967 Popular Electronics - RF Cafe
    Before there were vacuum tube and semiconductor diodes for use as RF signal detectors, there was the coherer This article by Henry Davis in the May 1967 Popular Electronics magazine discusses the invention of the coherer by Dr Edouard Branley Dr
  • History of the Coherer - OneTubeRadio. com
    The coherer was one of the first methods of detecting radio waves In 1850, the French scientist Pierre Guitard had discovered that dust particles in the air cohered, or collected together, when electrified
  • Coherer Radio Detector History - Electronics Notes
    The coherer was used with the spark transmitters of the day: these transmitters used a high voltage, often created by an induction coil arrangement, and this was then used to create a spark, and the resultant signal was radiated by an antenna connected to the system
  • Marconi Coherer - SparkMuseum
    The coherer was the first device used to detect radio frequency signals in wireless telegraphy Its operation is based upon the large resistance offered to the passage of electric current by loose metal filings, which decreases under the influence of radio frequency alternating current





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