The actress and inventor is Hedy Lamarr.

Quick Scoop

Hedy Lamarr was an Austrian-American actress and self-taught inventor whose World War II–era “secret communication system” became the foundation for today’s WiFi, GPS, and Bluetooth technologies. She co-created a frequency- hopping spread-spectrum system designed to stop enemies from jamming radio- guided torpedoes, an idea that later underpinned modern wireless communication standards.

Who She Was

  • Hedy Lamarr was a major Hollywood star in the 1930s and 1940s, known for films like Algiers and Samson and Delilah.
  • Despite being famous for her beauty, she spent her off-screen time working on engineering ideas and inventions at home and on movie sets.

What She Invented

  • Together with composer George Antheil, Lamarr patented a “secret communication system” in 1942 that used rapidly changing radio frequencies to prevent interception and jamming.
  • This frequency hopping concept evolved into spread-spectrum techniques that form the technical basis of many wireless systems, including WiFi, Bluetooth, GPS, and parts of mobile networks.

Why It Matters Today

  • Modern wireless standards such as IEEE 802.11 WiFi and related spread-spectrum technologies are widely recognized as being inspired by Lamarr’s early work.
  • Because of this legacy, Hedy Lamarr is often called the “mother of Wi-Fi” and has been honored posthumously in the National Inventors Hall of Fame and by organizations like the Electronic Frontier Foundation.

TL;DR: The answer to “which actress and inventor pioneered the technology responsible for all modern wireless communication systems, including WiFi, GPS, and Bluetooth?” is Hedy Lamarr.

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