On Wed, 27 Apr 2005 09:26:48 -0400, "J. Mc Laughlin"
wrote:

Well reasoned.

Think of a three-dimensional curve of cost, uncertainty, and frequency to
measure gain on a range. Think of a second 3D curve involving modeling. My
guess is that below something like 20 MHz (use your own number) modeling is
to be preferred.


On a related topic: I saw with my own eyes NBS in Boulder (c. 1978)
using a different technique to measure gain. It was a near field scheme
where a probe was moved in front of the antenna while its vector voltage and
position was measured. (As I recall, a pair of lasers was used in the
measurement of the probe's x and y position.) The (vast number of)
measurements were then imported into a computer that computed the gain. As
we say: "you could do that!" I never thought to ask what the expected
uncertainties were expected to be.


http://www.nearfield.com/