El 19-11-14 7:24, Izur Kockenhan escribió:
[...]

manual calculation of a lossless Lambda-5/8-Ground-Plane-Antenna (radials at
0°):

www.leobaumann.de/unbenannt1.pdf

lol - Izur Kockenhan



The document is nice for the antenna only, however we can't avoid
mother earth. To get the far field elevation pattern for the antenna
with respect to mother earth, you need to take the ground properties
into account.

When the quarter wave or 5/8 lambda antenna is say 0.25lambda above
ground, you can use the two ray model using the direct ray and the
reflected ray to get a good impression. The reflection (versus
elevation angle) you can calculate using the Fresnel Equations for
media interfaces (using p-polarization).

--
Wim
PA3DJS
Please remove abc first in case of PM