Yagi Antenna
From ETHW
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Japan. In 1926, Professor Hidetsugu Yagi and his assistant, Shintaro Uda published on the sensitive and highly-directional antenna they designed and constructed using closely-coupled parasitic elements. The antenna, which is effective in the higher-frequency ranges, has been important for radar, television, and amateur radio.
Further References
Brittain, James. E. “Yagi on a Microwave Communication System,” Proceedings of the IEEE 72, No. 5 (May 1984).
Yagi, Hidetsugu. U.S. Patent No. 1,860,123, "Variable Directional Electric Wave Generating Device", filed 3 September 1926.
