Im thinking that earth ground is return circuit for radio station transmitters ? maybe you could tell us how to build a reasonable ground plane for this application. as part of the thought if Im not mistaken an example would be a car as a gound plane for its radio receivers as it has no earth unless you are dragging an anchor
In general, it makes little difference for receivers, but for transmitter
antenna counterpoise the last thing you'd want is a ground rod. Earth
is very lossy, and having half of the RF current flowing into lossy
earth and keeping earthworms warm isn't a very efficent use of RF energy.
The best ground is a series of radials laid on the earth surface,
laid out like the spokes of a wheel. Burying the radials increases
the losses, with the depth becoming more critical as the frequency
is increased. Essentially you want a ground plane that is highly
conductive below the radiator--in effect it serves as the other half
of a dipole element for a single wire antenna. Many broadcast
stations followed the RCA standard and use 120 1/4-wave
radials below each vertical radiator.
A car body can serve as the missing "half" of the antenna; but it
isn't very efficient below VHF. Besides at HF, you'd be using a very
electrically short antenna that has low radiation resistance and
high ohmic losses.
Unfortunately the term "Ground" is often used synomously for
RF, lightning/static dissipation and AC safety concerns--that's
why some clarity as to what the poster is trying to accomplish
is helpful in these instances. http://www.k0bg.com/ground.html
Petehttp://www.antennasbyn6lf.com/design_of ... d_systems/http://www.chem.hawaii.edu/uham/radials.html