In telecommunication, the term beamwidth has the following meanings:
In the radio regime, of an antenna pattern, the angle between the half-power (3-dB) points of the main lobe, when referenced to the peak effective radiated power of the main lobe.
The term "Yagi-Uda" is also used for this type of antenna after the inventor, Mr.
The Yagi antenna creates a beam pattern with a very narrow vertical beamwidth relative to vertically-oriented dipole, reflector, and director elements.
The antenna elements can be exposed or the director/dipole/reflector construction can be built as a cylindrical antenna component.
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