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 ...

This process repeats another 3 times until the array is fully deployed. The Base Station has a pair of Radioisotope Thermal Generators (RTG), providing power, signal processing, and telecommunications ...

[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 ...