Radio Time MachineRF History Explorer
Travel through 130+ years of radio technology. Tap any era to see its signal waveform, hear its sound, and learn about the inventors who shaped wireless communication — from spark gap transmitters to WiFi 7.
Spark Gap
1887 – 1920The first practical radio transmitters. A high-voltage spark across a gap created broadband electromagnetic pulses — noisy, inefficient, but revolutionary.
Hertz proved EM waves exist (1887). Marconi commercialised wireless telegraphy, sending signals across the Atlantic in 1901.
How RF Technology Evolved
- Analog Era (1887–1980)
From spark gaps to FM radio — engineers learned to shape continuous electromagnetic waves to carry voice, music, and television across vast distances.
- Digital Revolution (1991–2010)
Digital modulation unlocked encryption, error correction, and spectral efficiency. GSM, WiFi, and early LTE transformed how billions connect.
- Modern Wireless (2019–present)
5G NR and WiFi 7 push the boundaries with massive MIMO, beamforming, OFDMA, and multi-link operation for unprecedented speed and reliability.