The Moxon is a two-element parasitic array (one driven element, one reflector) folded into a rectangular shape. Despite having only two elements, it achieves:
If you specifically need build plans for a Moxon rectangle, resources like the 20m Moxon-Yagi Antenna Build Guide hf antennas for all locations moxon pdf hot
Reducing the size of beam antennas without significant loss in performance. The Moxon is a two-element parasitic array (one
"Hotter than a two-dollar pistol," Bill muttered as he walked over, finally freed from the tower work. He looked at the wire rectangle. "That’s it? That’s what’s going to work Europe?" hf antennas for all locations moxon pdf hot
HF Antennas for All Locations : L. A. Moxon - Internet Archive