Roy, I looked at the graph and get a different interpretation. Every spacing
except 1/2 wave length spacing shows gain. That being the case the pattern
must be distorted for all cases except .5 wavelength.

I have Kraus 1950 edition

"Richard Harrison" wrote in message
...
Roy Lewallen
, W7EL wrote:
"I don`t have Kraus` 3rd edition (yet), but there`s graph on p 546 of
thye second edition which I suspect is the same as the one Richard is
referring to."

I`m sure that`s it. I have Kraus` 1950 edition of "Antennas" and the
identical groph is on page 327 in it.

If you look at the patterns of a 1/2-wavelength antenna at spacings of
1/4, 1/2, and 1/16 wavelengths spacing from a flat reflector nearby,
they are all nearly circular, indicating little distortion in their
unblocked direction.

Best regards, Richard Harrison, KB5WZI