Jeff Liebermann wrote:

"Resonance phenomena on Yagi arrays"
http://adsabs.harvard.edu//abs/1981CEEJ....6....9T


BTW, this link has to do with resonance of the yagi in a narrowband
range just below the director array cutoff frequency, and nothing to do
with the driven element.

Google can be your friend, but when used without vetting the results can
sometimes lead to embarrassment. In this group, it's nothing like the
nonsense spouted by Art and some others however, so no worries.

tom
K0TAR