"Richard Fry" wrote in message
...
"art" wrote in message
Really Cecil I am trying to get people to think
about elements containing inherranr directional properties so that
uneeded radiation is harnessesd for useful purposes but they are
shutting their ears.

every thing that radiates has 'inherent directional properties'. it is
those properties that software like nec models. adding up all the
contributions of lots of little tiny pieces of radiating current is what
goes into designing all sorts of antennas, including yagis. there is no
magic wire that is going to get more power on target, no strange property
that is going to give you super gain, and no way to get rid of all the
'uneeded radiation'. There will always be some losses, power going where
you don't want it to, etc... believe me, many phd's have made their life
studies of reducing that last little bit of radiation off the side or back,
and the conclusion is??? you can't do it. there are many volumes on how to
reduce it in different cases, lots of spectacular designs that are totally
impractical for ham use, and some super applications of standard techniques
for things like the deep space network and radio astronomy.. but there is no
magic in a wire, no matter how you bend it or where you stick it.