KK9A said:
"All of the Hy-Gain and M2 monobanders that I have seen the manuals for
are not directly fed Yagis."
As far as I know, Hy-Gain never made an OWA. The M2 Yagis with closely
spaced directors intended to raise the feed impedance were for VHF/UHF.
The OWA technique costs forward gain. Here is a way around that limitation:
https://k6sti.neocities.org/owa
Here the trick achieves 20% bandwidth:
https://k6sti.neocities.org/five
I wrote a high-accuracy Hairpin modeling program specifically to promote
non-OWA designs with higher gain. It takes everything I could think of
into account to eliminate (or at least minimize) the need for adjustment:
https://k6sti.neocities.org/hairpin
My take on the significance of gain loss:
https://k6sti.neocities.org/pileup
Brian
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