Monday, July 06, 2009

The Eggbeater

An interesting radiating form, the eggbeater antenna produces circular polarization at high angles, yet linear polarization at the horizon. Unlike soundwaves, radiowaves have a distinct polarization, with a magnetic field exactly perpendicular to an electric field. This perfect orthogonal relationship is a key feature of the electromagnetic domain, with time being a third orthogonal axis.

Soundwaves have two axes, not three. But soundwaves, being mechanical, and in a springy medium such as air, have other interesting properties that aren't obvious.

The eggbeater is useful for communications with overhead aircraft and satellites.

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