A full-size 20m Yagi requires a 6 m boom and 10 m element span. A 20m Moxon fits on a 4 m boom with a total width of ~7.5 m. It can be mounted just 6–10 m high and still outperform a dipole. Its high F/B reduces local QRM from nearby houses.
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| Antenna | Gain (dBi) | F/B (dB) | Size (% of Yagi) | Build complexity | |---------|------------|----------|------------------|------------------| | Dipole | 2.15 | 0 | 50% | Very low | | 2-el Yagi | 5.0 | 15 | 70% | Medium | | Moxon | 5.5 | 25 | 60% | Low | | 3-el Yagi | 7.5 | 20 | 100% | High | A full-size 20m Yagi requires a 6 m