In telecommunication, the term beamwidth has the following meanings: 1. In a radio antenna pattern, the half power beam width is 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. See beam diameter. Beamwidth is usually but not always expressed in degrees and for...
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http://en.wikipedia.org/wiki/Beamwidth
The angular extent of the beam of a radio telescope measured in degrees of arc. Generally an antenna with low gain has a large beamwidth, receiving signals well from a number of different directions.
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http://www.daviddarling.info/encyclopedia/B/beamwidth.html
the angle between two directions in a specified plane containing the direction of maximum radiation or the axis of symmetry of a beam or a radiation lobe, on both sides of this direction or axis, the two directions corresponding, for example, to a given fraction of the maximum radiation or to the first minimums NOTE - The most generally used beamwi...
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=712-02-33
The angular width of a cone of light whose apex is at the source. Beamwidth is usually defined as the angle subtended by a cone encompassing 90% of the energy.
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http://www.intl-lighttech.com/support/glossary
No exact match found.
