Dave VanHorn wrote:
What sort of antenna offers narrow beamwidth, combined with smooth
sidelobes?
I'm not too concerned with F/B ratio, or the magnitude of the sidelobes,
(smaller is better obviously) but I'm more concerned that they not be a mess
of deep spiky notches.

An Extended Double Zepp has a relatively narrow beamwidth
(~35 deg) and four side lobes about -13 dB down. I vaguely
remember a magazine article that told how to virtually
eliminate the EDZ side lobes.
--
73, Cecil http://www.qsl.net/w5dxp