Also classified as a beam antenna and a parasitic array, the Yagi is very widely used as a high-gain antenna on the HF, VHF and UHF bands.   It has moderate to high gain depending on the number of elements present, sometimes reaching as high as 20 dBi ,  in a unidirectional beam pattern  .
A Yagi-Uda array is a directional antenna consisting of several parallel dipole elements. Only one of these dipole elements is driven, the other elements being parasitic. Directionality is achieved by requiring that there be one longer element adjacent to the source element, which is referred to as the reflector.
Radiation Pattern of Yagi Uda Antenna. A directional antenna or beam antenna is an antenna, which radiates greater power in one, or more Directions allowing for increased performance on transmit and receive and reduced interference from unwanted sources.
Cubical Quad Versus a Yagi antenna . So why do many people say the Cubical Quad is the better antenna? Well for one thing you have twice the amount of element material in the air. A yagi antenna is 1/2 wave length per element. A one element 1/2 wave dipole is the same as the driven element of a yagi antenna. With some small size changes.
A Yagi-Uda antenna or simply Yagi antenna, is a directional antenna consisting of two or more parallel resonant antenna elements in an end-fire array; these elements are most often metal rods acting as half-wave dipoles. Yagi-Uda antennas consist of a single driven element connected to a radio transmitter and/or receiver through a transmission line, and additional "parasitic elements" with ...
The simulated antenna had a beamwidth of 35°, and a gain of 13,4dBi. While the constructed antenna was measured to have a beamwidth of 16°, a length of 1780mm, and a price of 24,50 euros. Index Terms—Yagi-Uda, directional radiation pattern, linearly polarized antenna, antenna design, construction I.
The antenna is designed and simulated in CST microwave studio. Key words: Yagi-Uda, dipole, reflector, director, VHF, Gain, Directivity and CST. 1 Introduction Yagi Uda antenna was introduced by Shintaro Uda and Hidetsugu Yagi in 1920 .It is a highly directional antenna and widely used in to receive TV signals. Now a day's Yagi -Uda