Base OMNIQUAD 6dbi wire antenna omni

[xm49north7]

I download this antenna calculator, it says all gaps fed with ladderline???, not sure how this antenna works, but it looks like a good idea, there is no model information, can be downloaded, along with many handy calculators from this link. Anybody up to model this one? Anybody explain how you would wire this. https://www.hamradiosecrets.com/antenna-software.html#SQB

 

[xm49north7]

When I look at this antenna, it would seem to just work out to be a vertical dipole like a biconical antenna. So to me the gain would not be 6, but rather closer to one, It would give, broad freq, response, but not seeing where the gain would come from, to me it is just 3 bent vertical dipoles???