On Wed, 06 Apr 2005 00:37:34 GMT, "
wrote:


"Roy Lewallen" wrote in message
...
Imagine that you put 100 watts into an isotropic radiator in free space
and measure its field strength at some distance. Then you create a ground
plane like the ones used by most modeling programs, perfectly flat and
infinite in extent, and make it perfectly conductive. Now distribute that
100 watts evenly in all directions, above the ground plane -- imagine a
sort of hemi-isotropic radiator which does this. Measure the field
strength at the same distance from the radiator as before.

find that the field strength is 3 dB higher, and the
power density twice as great,

That's interesting! That part regarding change of "density"
How does one determine the density changes in various parts of a radiation
pattern?

Jeeze. You use an rf densiometer of course.