E9D02 — Amateur Extra Class

E9D02 : How can two linearly polarized Yagi antennas be used to produce circular polarization?
A Stack two Yagis to form an array with the respective elements in parallel planes fed 90 degrees out of phase
B Stack two Yagis to form an array with the respective elements in parallel planes fed in phase
C Arrange two Yagis on the same axis and perpendicular to each other with the driven elements at the same point on the boom and fed 90 degrees out of phase
D Arrange two Yagis collinear to each other with the driven elements fed 180 degrees out of phase
Correct Answer: Arrange two Yagis on the same axis and perpendicular to each other with the driven elements at the same point on the boom and fed 90 degrees out of phase