Art wrote:
"Thought I would give you another example to laugh at."

Laughing is good for you but I`m still not laughing. Art may have a
valuable contribution to make. He gave some respectable performance
figures but I`m in the dark on how to reproduce them.

How an antenna`s gain adds up is shown by Kraus in his explanation of
the Deutche Welle antenna featured on the rear cover of the paperback
3rd edition of "Antennas". It starts on page 703 and continues on page
705.
"Solution:
(a) The gain of a single half-wave dipole is 2.15 dBi and of 2 collinear
in-phase half-wave dipoles is 3.8 dBi. The array of 8 such collinear
dipoles adds 3+3+3=9 dB. The reflector screen adds 3 dB more and the
ground bounce another 6 dB for a total gain of 3.8+9+3+6=21.8 dBi or a
directivity of 151 approx."

As for denigration, John D. Kraus was a radio amateur, W8JK.

Best regards, Richard Harrison. KB5WZI