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In [[electrodynamics]], '''circular polarization''' of [[electromagnetic radiation]] is [[polarization]] such that the tip of the [[electric field]] vector at a fixed point in space describes a circle. The magnitude of the electric field vector is constant.
A circularly polarized wave may be resolved into two [[linear polarization|linearly polarized]] waves, of equal amplitude, in [[phase]] [[quadrature]] and with their planes of polarization at right angles to each other.
Circular polarization may be referred to as <i>"right-hand"</i> or <i>"left-hand,"</i> depending on the direction in which the electric field vector rotates.
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