Intro

This is the second post on phased verticals. If you have not seen the first, here it is >>Half-square antenna....
After half-square antenna, I checked few similar configurations, adding phasing lines and vertical elements. Here is the popular antenna, usually called "double half-square":

As you see, it is basically 2 half-square antennas put together and fed in the center. The length of the phasing lines is still L/2, so left and right radiators emit in phase:

I am going to test a stealth antenna hidden in the trees close to my condo building. For that, I am looking into half-square design which supposedly will be able to provide some directivity/rejection at low height I am limited to. Here in this post I will be dumping my finds and 4NEC2 models.

The basic design we'll start from: