What about putting aluminum foil on your antenna?

John Wier wrote:

Now I'm sure there isn't a reader on this site that at one time didn't
try putting foil on their rabbit ears back before we had cable and
satellite tv. And it seemed to help. We were in effect making dish
antenna's of sorts. So we could grab more radio beams if we put some
foil in our aircraft antenna's

You put too much foil, its doubling your transmissions... G

There is the rule of size in that bigger is always better. I believe
your application fits reception. Our government has applied the rule to
operational budgets...