"corse, what do you do when your Isotropic antenna exibits gain over
your antenna? Does this mean if you stack 2 Isotropics, you have a
gain array ??

Roy Lewallen wrote:
Wes Stewart wrote:

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


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.


An alternate method is to put some of the RF into a water-tight and
RF-tight box -- a great application for one of those ammo boxes left
over from survivalist exercises or just plinkin'. Drop the box into a
tub of water and see how much the water level rises. Then open the box
and let the RF out. (Be sure to wear safety glasses. A shielded cod
piece isn't a bad idea either.) Repeat the measurement. You can then
calculate the power density from the difference between the amounts the
water level rises.

Roy Lewallen, W7EL
(a little late this year, but hey, better late than never)