I have seen sketches of 3-element 2m yagi antennas in which the driven dipole elements are staggered i.e., one element is positioned slightly in front of the other along the length of the (plastic) horizontal beam. these elements also "overlap" slightly, as they protrude through the beam pipe for an inch or so and the coax is connected directly to the elements at the ends of these protrusions.
I've been told that the staggered elements raise the feedpoint impedance to furnish a correct impedance match to RG-58/U coax without requiring a balun transformer. Is this a true claim? And do the elements need to be driven at their overlapping ends? Or does this overlap matter at all? In short...
Where can I find detailed design rules for staggered dipoles like this? I would like to try this design in a 5-element Yagi.
In the image linked below, you can see the "stagger" (one element is in front of the other) and the "overlap" (the elements cross over the horizontal beam midpoint).