"Roy Lewallen"
Elevated radials do radiate. However, assuming a symmetrical structure,
the radiation is minimal (assuming there's another normally radiating
conductor in the system) because the fields from the wires nearly cancel
in all directions. At right angles to the plane of the radials and along
the center line, the cancellation is complete and radiation zero --
again assuming a perfectly symmetrical structure. In a typical ground
plane vertical system, the contribution to the total field from the
radials is minimal, in any direction.
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Here is a link to a NEC-2 study I did about a month ago for a broadcast
board, based on this configuration. Roy, I'd be grateful for your comments
if you see anything you don't agree with there.

http://www.freefilehosting.org/publi...60%20Plots.pdf

RF