The History of Radar: 120 Years from Spark Gaps to Chips

In 1935, Britain asked a scientist to build a death ray. He said it was impossible, and invented something far more important instead. This is the story of radar: from Heinrich Hertz's sparks in 1886, to a forgotten German inventor, to the towers that helped win the Battle of Britain, the magnetron that changed the war, the warning ignored at Pearl Harbor, and finally radar on a chip in your car and phone. ⏱ Chapters 0:00 07:02, Pearl Harbor 0:55 Invisible waves (1886) 1:36 The forgotten inventor (1904) 2:21 The death ray (1935) 3:27 The Daventry experiment 4:32 Chain Home & the Battle of Britain 6:03 The magnetron 7:07 Ignored warnings 8:01 Radar comes home 9:01 The death ray that never was 9:43 Recap ▶ Previous: Decibels for Radar Engineers ▶ Next: Radar Frequency Bands (coming soon) 📚 Sources & further reading IEEE Milestone: Radar Predecessor, 1904 (Hülsmeyer) — ethw.org Engineering & Technology History Wiki: Cavity Magnetron — ethw.org Wikipedia: Daventry experiment · Chain Home · Tizard Mission · Radar warning of Pearl Harbor attack Google Research: Soli radar in Pixel 4 Microwave Journal: Automotive radar from its origins to future directions 📡 About Chirp Theory Radar and signal processing, explained by an engineer with 10 years in the radar industry. 💬 Which part of radar history surprised you most? Tell me in the comments. ────────── Credits Script, animation and engineering content: Chirp Theory Narration voice: Kokoro TTS (Apache 2.0) Music and sound effects: original, made for this channel #radar #history #ww2 #engineering #battleofbritain