A Moxon measured at 10 feet will look detuned. Raise it to 20+ feet. SWR will drop.

A Moxon is a rectangular two-element beam derived from a 2-element Yagi with the ends folded inward. That folding reduces overall length while creating strong coupling between driven element and reflector, producing forward gain and rear suppression with only moderate complexity.

The width of the antenna is reduced to roughly 70% of a full-size Yagi.

The Moxon Rectangle: Efficient HF Performance for Every Location

Because the spacing between the tips of the elements is critical down to the fraction of an inch, precise measurements are mandatory when building a Moxon. Hams seeking construction blueprints, calculators, and comprehensive PDFs generally rely on a few trusted resources. Automated Design Calculators

: It is famous for its high front-to-back (F/B) ratio, often exceeding 30 dB . This allows you to "null out" interference from the rear while focusing on the station you want to hear.

Note: The gap () is calculated by subtracting B and C from E (