Circular polarization: Difference between revisions

Revision as of 14:10, 23 September 2005

Revision as of 16:26, 28 September 2005

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Circular polarization may be referred to as ''right'' or ''left'', depending on the direction in which the electric field vector rotates. When looking toward the source, right hand circular polarized light rotates counter-clockwise as time increases. It describes a left handed helix along the propagation axis though. The difference in these terms stems from the first definitions of polarizations, which was defined looking into the source, while the handedness or helicity is defined along the direction of the light.

== FM radio ==

The term "circular polarization" is often used erroneously to describe mixed polarity signals used mostly in [[FM radio]] (87,5 to 108,0 MHz), where a vertical and a horizontal component are propagated simultaneously by a single or a combined array.

This has the effect of producing greater penetration into buildings and difficult reception areas than a signal with just one plane of polarisation.

== See also ==

* [[polarization]] for more information.

* [[Federal Standard 1037C]]

==Source==

* [[Linear polarization]]

A previous version of this article came from

* [[MIL-STD-188]]

*[[Federal Standard 1037C]]

* [[MIL-STD-188Polarization]]

[[Category:Antenna terminologyPolarization]]

[[Category:Optics]]

[[Category:Electromagnetic radiation]]