>An ideal "isotropic" antenna (my favourite kind, although unfortunately it doesn't exist) picks up the signal equally in all directions, which means the region

>An ideal "isotropic" antenna (my favourite kind, although unfortunately it doesn't exist) picks up the signal equally in all directions, which means the region it "scoops" is spherical. It would be interesting to see (and test!) a spherical antenna -- if one does/could exist... Also -- what might be interesting might be getting two spherical antennas of the exact same size in resonance, over a distance between the pair which is some exact whole number multiple of their diameter... Or across pairs of such spherical antennas... or pairs of pairs... Anyway, a very interesting article!