Originally Posted by Hants
My understanding is that a 1/2 wave doesn't have quite the gain of a 5/8. However, it doesn't need a groundplane.
It's not that simple. Are you planning on coming to the ham classes this month? I figured the question about 1/4, 1/2, 5/8, monopoles, dipoles, SWR, gain, impedances, efficiency, etc. would come up in there... The short answer is that all
monopoles work better with a ground plane, although some antennas can work satisfactorily without one.