Cecil, that is what I did with NEC, and got an efficiency
of about 35%. Using the ratio of Rr/(Rr+Rloss)
produces a totally different answer.

NEC 4 computes a normalized far field, at 1 m, in units
of volts. NEC 2 incorrectly shows units of V/m.

W7EL tells us that EZNEC doesn't display the surface
wave which obviously contains power. Would that affect
the efficiency using the integration technique?
--
73, Cecil http://www.qsl.net/w5dxp

Good point Cecil, I forgot about the surface wave. Will have to
find a way of including it.

Frank