# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/karl-ferdinand-braun
# Generated: 2026-09-01T16:13:43.139Z

schema: https://schema.org/Person
url: "https://fame.am/person/karl-ferdinand-braun"
name: "Karl Ferdinand Braun"
slug: "karl-ferdinand-braun"
description: "He built the first cathode-ray tube, invented the semiconductor diode, and designed the phased array antenna — three devices that seeded television, all of electronics, and radar. Most of the signals humming through modern life trace back to his bench."
tagline: "German inventor and physicist (1909 Nobel Prize)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Ferdinand_Braun.jpg"
gender: "male"
country:
  name: "Germany"
  isoCode: "DE"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1850-06-06"
deathDate: "1918-04-20"
livingStatus: "DECEASED"
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  momentum:             23.2370820668693
  historical:           23.49846533333334
  currentAttention:     32.48957881024751
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "RISING"
ranks:
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  country:  null
  category: 123
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  - name: "Scientist"
    slug: "scientist"
  - name: "Physics"
    slug: "physics"
  - name: "Science"
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  - name: "19th Century"
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# bio (long form, separated for readability)
bio: |
  Karl Ferdinand Braun was born on 6 June 1850 in Germany and worked as an applied physicist at a time when wireless communication was still theoretical. In 1874 he constructed the first semiconductor diode, a quiet landmark that would eventually open the door to all of electronics. Twenty-three years later, in 1897, he built the first cathode-ray tube — the ancestor of every television screen for the next century. His two-circuit system made long-range radio transmission practical, and in 1905 he invented the phased array antenna, the architecture underlying radar and modern smart antennas. He shared the 1909 Nobel Prize in Physics with Guglielmo Marconi for their work on radio, co-founded Telefunken, and died on 20 April 1918, leaving behind the infrastructure of the connected world.