E9C10 - Amateur Extra Class

E9C10 : Which of the following describes a Zepp antenna?
A A horizontal array capable of quickly changing the direction of maximum radiation by changing phasing lines
B An end-fed half-wavelength dipole
C An omni-directional antenna commonly used for satellite communications
D A vertical array capable of quickly changing the direction of maximum radiation by changing phasing lines
Correct Answer: An end-fed half-wavelength dipole