On 22 Sep, 16:02, "Richard Fry" wrote:
"art" wrote O.K. I may have muddied things. I hold to the fact that a one
wavelength dipole will always radiate at a higher efficiency than a
1/2 wave dipole.

_________

Please post your definition of "efficiency," in this context.

RF

Power in vs power out of a system. I know how to do this for a
parallel circuit ala
a tank circuit where energy is released in equilibrium fashion. For a
half wave dipole
you can't have two energy containers so you may or may not be heading
for excess end effects because of high voltage looking for where it
has to go. (Personally I don't know how a half wave radiates because
that form vuews the cyclic current continually radiating as the time
variant which is contrary to all other radiations i.e. a spark plug,
ahydregen bomb which is a bigger container that a flyback transformer
and a bigger container will always beat a small container with respect
to out going accelleration of energy, particles or plasma which ever
you may prefer)without any known proof.I believe that is why the quad
was designed to get away from the spark plug type emmissions at the
ends of the radiator.
On the other side of the coin, since both a quad and a 1/2 wave dipole
is assumed to be suitable drivers for a yagi array both must be bi
directional so gain is applicable when comparing these radiators I
would would think!
Best regards
Art