For amateur radio operators, the quest for the perfect antenna never seems to end. Perhaps that’s because our requirements are always changing. We never quite seem to get to one design that can ...

Let there be light - and it was directional: The world's first electrically powered Yagi-Uda antenna was built at the University of Würzburg's Department of Physics. Disclaimer: AAAS and EurekAlert!

Key aspects of the electromagnetic wave behavior and design of antennas and antenna arrays from wire dipoles and Yagi-Uda antennas above the Earth’s surface to aperture antennas such as horns and ...

A quantum dot drives an optical Yagi-Uda antenna giving a highly directed beam of single photons. This image relates to an article that appeared in the Aug. 20, 2010, issue of Science, published ...