This is a wideband antenna called a log-periodic, and it’s an array of dipoles of different frequencies. Yet again if you can estimate the size of each dipole it’s possible to work out the ...

[DXCommander] shows us his 40 meter two-element vertical antenna build in the video below. A typical Yagi is just a dipole with some ... We’ve also seen arrays that require multiple elements ...

The individual antenna nodes are a crossed dipole with preamplifier ... as well as potentially creating discrete reflections for the eventual array. The largest boulders are expected to be on the ...