Onnowpurbo at 00:10, 27 January 2010

2010-01-27T00:10:32Z

← Older revision		Revision as of 00:10, 27 January 2010
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	In the field of [[Antenna (radio)\|antenna]] design the term ''''''radiation pattern'''''' most commonly refers to the ''directional'' (angular) dependence of radiation from the antenna or other source (synonyms: '''antenna pattern''', '''far-field pattern''').		[[Image:Radiation-patterns.jpeg\|right\|200px\|thumb\|Radiation Patterns]]
			In the field of [[Antenna (radio)\|antenna]] design the term ''''''[[radiation pattern]]'''''' most commonly refers to the ''directional'' (angular) dependence of radiation from the antenna or other source (synonyms: '''antenna pattern''', '''far-field pattern''').

	Particularly in the fields of [[fiber optics]], [[laser]]s, and [[integrated optics]], the term radiation pattern, or '''near-field radiation pattern''', may also be used as a synonym for the '''near-field pattern''' or '''Fresnel pattern'''. This refers to the ''positional'' dependence of the electromagnetic field in the [[near-field\|near-field, or Fresnel region]] of the source. The near-field pattern is most commonly defined over a plane placed in front of the source, or over a cylindrical or spherical surface enclosing it.		Particularly in the fields of [[fiber optics]], [[laser]]s, and [[integrated optics]], the term radiation pattern, or '''near-field radiation pattern''', may also be used as a synonym for the '''near-field pattern''' or '''Fresnel pattern'''. This refers to the ''positional'' dependence of the [[electromagnetic field]] in the [[near-field\|near-field, or Fresnel region]] of the source. The near-field pattern is most commonly defined over a plane placed in front of the source, or over a cylindrical or spherical surface enclosing it.

	The far-field pattern of an antenna may be determined experimentally at an [[antenna measurement\|antenna range]], or alternatively, the near-field pattern may be found using a '''[[Electromagnetic near-field scanner\|near-field scanner]]''', and the radiation pattern deduced from it by computation.		The far-field pattern of an antenna may be determined experimentally at an [[antenna measurement\|antenna range]], or alternatively, the near-field pattern may be found using a '''[[Electromagnetic near-field scanner\|near-field scanner]]''', and the radiation pattern deduced from it by computation.

	The far field radiation pattern may be represented graphically as a plot of one of a number of related variables, including; the field strength at a constant (large) radius (an '''amplitude pattern''' or '''field pattern'''), the power per unit solid angle ('''power pattern''') and the gain or [[directive gain]]. Very often, only the relative amplitude is plotted, normalized either to the amplitude on the antenna [[boresight]], or to the total radiated power. The plotted quantity may be shown on a linear scale, or in [[Decibel\|dB]]. The plot is typically represented as a three dimensional graph (as at right), or as separate graphs in the [[vertical plane]] and [[horizontal plane]].		The far field radiation pattern may be represented graphically as a plot of one of a number of related variables, including; the field strength at a constant (large) radius (an '''amplitude pattern''' or '''field pattern'''), the power per unit solid angle ('''power pattern''') and the gain or [[directive gain]]. Very often, only the relative amplitude is plotted, normalized either to the amplitude on the antenna [[boresight]], or to the total radiated power. The plotted quantity may be shown on a linear scale, or in [[Decibel\|dB]]. The plot is typically represented as a three dimensional graph (as at right), or as separate graphs in the [[vertical plane]] and [[horizontal plane]].

Onnowpurbo: New page: In the field of antenna design the term ''''''radiation pattern'''''' most commonly refers to the ''directional'' (angular) dependence of radiation from the antenna or ...

2010-01-27T00:07:59Z

New page: In the field of antenna design the term ''''''radiation pattern'''''' most commonly refers to the ''directional'' (angular) dependence of radiation from the antenna or ...

New page

In the field of [[Antenna (radio)|antenna]] design the term ''''''radiation pattern'''''' most commonly refers to the ''directional'' (angular) dependence of radiation from the antenna or other source (synonyms: '''antenna pattern''', '''far-field pattern''').

Particularly in the fields of [[fiber optics]], [[laser]]s, and [[integrated optics]], the term radiation pattern, or '''near-field radiation pattern''', may also be used as a synonym for the '''near-field pattern''' or '''Fresnel pattern'''. This refers to the ''positional'' dependence of the electromagnetic field in the [[near-field|near-field, or Fresnel region]] of the source. The near-field pattern is most commonly defined over a plane placed in front of the source, or over a cylindrical or spherical surface enclosing it.

The far-field pattern of an antenna may be determined experimentally at an [[antenna measurement|antenna range]], or alternatively, the near-field pattern may be found using a '''[[Electromagnetic near-field scanner|near-field scanner]]''', and the radiation pattern deduced from it by computation.

The far field radiation pattern may be represented graphically as a plot of one of a number of related variables, including; the field strength at a constant (large) radius (an '''amplitude pattern''' or '''field pattern'''), the power per unit solid angle ('''power pattern''') and the gain or [[directive gain]]. Very often, only the relative amplitude is plotted, normalized either to the amplitude on the antenna [[boresight]], or to the total radiated power. The plotted quantity may be shown on a linear scale, or in [[Decibel|dB]]. The plot is typically represented as a three dimensional graph (as at right), or as separate graphs in the [[vertical plane]] and [[horizontal plane]].

Pola radiasi - Revision history

Onnowpurbo at 00:10, 27 January 2010

Onnowpurbo: New page: In the field of antenna design the term ''''''radiation pattern'''''' most commonly refers to the ''directional'' (angular) dependence of radiation from the antenna or ...