Richard Harrison wrote:

Build a small scale model that can be tested indoors and report its
characteristics. Antennas are scaleable.

That's more easily said than done. One of the critical characteristics
of a small antenna is loss. And to correctly replicate loss in a scaled
antenna requires scaling the conductivity of the conductors as the
square root of the frequency. To scale to a higher frequency requires
that the conductivity be better than the original. Unless the original
is made from lead and the scale factor moderate, this wouldn't be possible.

Roy Lewallen, W7EL