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This paper explores a new possible type of high-power mesoband radiator. This consists of a pair of dipoles, one electric and one magnetic, with aligned vectors, but pi/2 (90deg) out of phase. This gives a circular polarization in the far field.
The use of differential high-power sources gives another degree of freedom to antenna design, including two-element arrays. Symmetry considerations are discussed in the context of helical antennas for circular and linear polarizations.
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