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Line 9: == 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.

Circular polarization: Difference between revisions