Question Pool -- Category E9D

How is circular polarization produced using linearly polarized antennas?
A.
Stack two Yagis, fed 90 degrees out of phase, to form an array with the respective elements in parallel planes
B.
Stack two Yagis, fed in phase, to form an array with the respective elements in parallel planes
C.
Arrange two Yagis perpendicular to each other, with the driven elements in the same plane, fed 90 degrees out of phase
D.
Arrange two Yagis perpendicular to each other, with the driven elements in the same plane, fed in phase

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