A Yagi-Uda antenna, commonly known simply as a Yagi antenna, is a directional antenna consisting of multiple parallel dipole elements in a line, usually made of metal rods. It consists of a single driven element connected to the transmitter or receiver with a transmission line, and additional parasitic elements: a so-called reflector and one or more directors. The reflector element is slightly longer than the driven dipole, whereas the directors are a little shorter. This design achieves a very substantial increase in the antenna’s directionality and gain compared to a simple dipole.
The antenna was invented in 1926 by Shintaro Uda of Tohoku Imperial University,Japan, with a lesser role played by his colleague Hidetsugu Yagi. However the “Yagi” name has become more familiar with the name of Uda often omitted. This appears to have been due to Yagi filing a patent on the idea in Japan without Uda’s name in it, and later transferring the patent to the Marconi Company in the UK. Yagi antennas were first widely used during World War II in radar systems by the British, US and Germans. After the war they saw extensive development as home television antennas.
See More: KX4O-Yagi-Uda_Presentation
An American satellite, abandoned in 1967 as a piece of Space Junk has begun transmitting again after 46 years Lincoln Experimental Satellite refers to... Read more
The ARRL VEC Department reports that 20,447 new US Amateur radio licenses have been issued since January 1. That’s nearly 1500 ahead of the number tha... Read more
Episode 182: World’s Best Hobby – Dave Bell W6AQ on HamRadioNow “Until the Internet age, Dave Bell W6AQ was the most prolific produc... Read more
FlexRadio FlexRadio Systems announces the immediate availability of SmartSDR v1.5.0 for the FLEX-6000 Signature Series SDRs which includes the new Wid... Read more
Sylvan Grove Hospital Butts County ham radio operators Ken Wallis, left, and Darlene Ragon set up the amateur radio purchased with grant money and ins... Read more
Can you hear me now? Lenoir Amateur Radio Club goes old school, but helps out Photo: Gina Story/Special to the Hickory Daily Record Thomas Land... Read more