http://www.essexrepeatergroup.org.uk/gb3cms.htm
Horizontally Polarised Omnidirectional Slotted Waveguide
10-slot winged K5SXK/WA5VJB based design
Also interesting radome is build.
Here are the pictures.
Now using wings we getting bigger ground plane – ro this is writen in big books – i must try this some time.
I lake the radome too it is simple to make.
And as final we get quite strange shape for this antenna π , I like this too.