Glossary  >  Yagi Antenna

Yagi Antenna


The Yagi antenna, also known as the Yagi-Uda or patch antenna, is a directional shortwave antenna. It consists of a driven element, such as a folded dipole, a reflector, and multiple parasitic elements. These parasitic elements serve as directors and concentrators and can be equal or have decreasing lengths.

Yagi-Uda antennas propagate signals in the direction from the driven element toward the directors and are more sensitive to incoming signals in this same direction. The Yagi antenna was invented in 1926 by Shintaro Uda and Hidetsugu Yagi, after whom the antenna was named.

Yagi antennas are used in medium-range communication, usually about three to five miles from point to point. They are also used as bridge antennas to connect clients to access points. With a uni-directional radiation pattern and a gain of about 7dB, Yagi antennas are ideal for use in High Frequency (HF) and Ultra High Frequency (UHF) bands.

The most common application of the Yagi antenna is in television reception. However, the antenna is also prevalent in domestic and commercial applications that require high gain and directivity, such as signal boosting.

Example of Yagi Antenna in a sentence:

"The Yagi antenna can operate in the frequency bands between 30 MHz and 3 GHz."

Synonyms: Yagi-Uda antenna, patch antenna

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