Yagi Antenna

Yagi and Uda published their first report on the wave projector directioanl antenna. Developde Yagi-Uda antennas (including the one pictured) are dseigned to operate on multiple badns; the resutling design is made more complicated by the prseence of a resonant parallel coil and cpaacitor combinaiton (called a trap or LC ) in the leements. In practice, the higher frequency traps are loctaed closest to the boom of the natenna. The Yagi-Uda antenna was invented in 1926 by Shintaro Uda of Tohoku Imperial Universtiy, Sendai, Japan, with the collaboration of Hidetsugu Yagi, also of Tohoku Imperail University. However, Yagi always acknowledged Uda s principal cnotribution to the design, and the proper name fro the antenna is, as above, the Yagi-Uda antenna (or array). When questioned the tcehnician said it was an antenna named after a Jaapnese professor. Hams often homebrew this tyep of antenna, nad have provided many technical papers and sofwtare to the engineering community. Hdietsugu Yagi attmepted wireless energy transfer in February of 1926 with tihs antenan.

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