From Wikimedia Commons, the free media repository. Deutsch: Yagi-Uda-Antennen. English: Yagi-Uda antennas. Nederlands: Yagi-antennes.
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From Wikimedia Commons, the free media repository. Deutsch: Yagi-Uda-Antennen. English: Yagi-Uda antennas. Nederlands: Yagi-antennes. Shintaro Uda Hidetsugu Yagi. Media in category "Yagi-Uda antennas" The following files are in this category, out of total. A television antenna in Kakinada. Aerial antenna. Another broken north american television antenna. Antenna d44ac. Antenna roof Hemleben. Antenna Shapes Antenne-IMG Antennes radiodiffusion.
Antennes toits Aigues-mortes. Antennes uhf. Antenu charakteristikos1. Ardf Beyond Antennas to the Bridge Big aerial on Portland Place, Chinese Embassy. Biologist tracking Louisiana black bear.
Bird tracking Bonaire Motel Broken north american television antenna. Cape Cod style house. Chinese Embassy, Portland Place, W1. Climbing antenna. Conducting radio telemetry scans in the North Fork Cooby Creek Yagi Array.
Director of Yagi. Disused building, King's Weston Lane, Avonmouth - geograph. Dueling Cross Yagis. During Friday's den visit, a wildlife biologist locates a collared lynx from the bed of a truck.
Employee uses tracking device to locate animal. Esquema antena yagi. ESTCube-1 Ground station antena. Fortepan FSpace ground station. FuG and FuG radar of Me Ham Radio Antenna. Handheld telemetry. Harlem Rooftop Hatzerim Radar. Important research Keld Gydum-IMG yagi. Lichtenstein FuG Viestimuseo 3. Monument of Yagi Antenna at Mount Teine. Motus radiotracking Multiple Antenna. P P radar VS. P VS 1.
P air defense radar system PM radar. P18 VS. Peleshair on antenna. PRC tactical satellite terminal. Proyectos de radioseguimiento. Py5aal Yagi apontada para cima. Radio tracking a Lynx lynx in Romanian Carpathians!.
Radioamateur - Antenna Farm. Raising Mast with Yagi Antenna. Rooftop Antennae. Shortwave Berlin. Sternwarte Bochum Antennen. Sunset TV aerials in Bairro Alto.
TDT antenna direttiva. TDT antenna Sigma. Terazza, Ljungby Three UHF Yagi television antennas. Tracking Mountain Lions. TV antennas under roof. Two meter yagi. Uhf Russel I. Holmes from St. Helena, Calif. Vu2gmn antenna. Yagi 3 element. Yagi 40m 3 elementos fio py5aal. Yagi Antenna 1. Yagi Antenna 2. Yagi antenna animation 16 frame 1. Yagi Antenna. Yagi TV antenna Yagi uda antenna. Yagi-Uda antenna for Wi-Fi on Router.
Yagi-Uda antenna. Category : Antennas by type. Namespaces Category Discussion. Views View Edit History. In other projects Wikimedia Commons Wikipedia. This page was last edited on 11 January , at Files are available under licenses specified on their description page. All structured data from the file and property namespaces is available under the Creative Commons CC0 License ; all unstructured text is available under the Creative Commons Attribution-ShareAlike License ; additional terms may apply.
Documentation Help Center. The yagiUda class creates a classic Yagi-Uda array comprised of an exciter, reflector, and N - directors along the z-axis. The reflector and directors create a traveling wave structure that results in a directional radiation pattern. The exciter, reflector, and directors have equal widths and are related to the diameter of an equivalent cylindrical structure by the equation.
A Yagi—Uda antenna , commonly known as a Yagi antenna , is a directional antenna consisting of multiple parallel elements in a line,  usually half-wave dipoles made of metal rods. The reflector element is slightly longer than the driven dipole, whereas the directors are a little shorter. The waves from the multiple elements superpose and interfere to enhance radiation in a single direction, achieving a very substantial increase in the antenna's gain compared to a simple dipole. The largest and best-known use is as rooftop terrestrial television antennas ,  but it is also used for point-to-point fixed communication links,  in radar antennas,  and for long distance shortwave communication by shortwave broadcasting stations and radio amateurs. The antenna was invented in 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.
In understanding the basic Yagi antenna theory, the different elements of the Yagi antenna react in a complex and interrelated way. One of the major keys to understanding Yagi theory is a knowledge of the phases of the currents flowing in the different elements of the antenna. The parasitic elements of the Yagi antenna operate by re-radiating their signals in a slightly different phase to that of the driven element. In this way the signal is reinforced in some directions and cancelled out in others.
Yagi Antenna Theory: Yagi Antenna Basics