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Statements

Subject Item
dbr:Antenna_boresight
rdf:type
dbo:AnatomicalStructure
rdfs:label
Antenna boresight
rdfs:comment
In telecommunications and radar engineering, antenna boresight is the axis of maximum gain (maximum radiated power) of a directional antenna. For most antennas the boresight is the axis of symmetry of the antenna. For example, for axial-fed dish antennas, the antenna boresight is the axis of symmetry of the parabolic dish, and the antenna radiation pattern (the main lobe) is symmetrical about the boresight axis. Most antennas boresight axis is fixed by their shape and cannot be changed. However phased array antennas can electronically steer the beam, changing the angle of the boresight by shifting the relative phase of the radio waves emitted by different antenna elements, and even radiate beams in multiple directions (multiple boresights).
dcterms:subject
dbc:Antennas_(radio)
dbo:wikiPageID
26666747
dbo:wikiPageRevisionID
1106368879
dbo:wikiPageWikiLink
dbr:Radiation_pattern dbr:Telecommunication dbr:Boresight_(firearm) dbr:High-gain_antenna dbr:Antenna_(radio) dbr:Radar dbr:Directional_antenna dbr:Dish_antenna dbr:Phased_array_antenna dbc:Antennas_(radio) dbr:Antenna_gain
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dbt:Telecomm-stub dbt:Reflist dbt:Antennas
dbo:abstract
In telecommunications and radar engineering, antenna boresight is the axis of maximum gain (maximum radiated power) of a directional antenna. For most antennas the boresight is the axis of symmetry of the antenna. For example, for axial-fed dish antennas, the antenna boresight is the axis of symmetry of the parabolic dish, and the antenna radiation pattern (the main lobe) is symmetrical about the boresight axis. Most antennas boresight axis is fixed by their shape and cannot be changed. However phased array antennas can electronically steer the beam, changing the angle of the boresight by shifting the relative phase of the radio waves emitted by different antenna elements, and even radiate beams in multiple directions (multiple boresights). The term boresight came from high-gain antennas such as parabolic dishes, which produce narrow, pencil-shaped beams which are difficult to aim accurately at a distant receiving antenna. These often are equipped with optical boresights to assist in aiming.
gold:hypernym
dbr:Axis
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wikipedia-en:Antenna_boresight?oldid=1106368879&ns=0
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1541
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wikipedia-en:Antenna_boresight