Yagi-Uda and Moxon

Overview

Directional high-gain antennas for ham radio, satellite links, LoRa and FPV. Matching: gamma, T, hairpin, choke balun.

From the simplest to the most complex: a two-element Moxon rectangle, up to a long Yagi on a metal boom with a folded or bow-tie driven element, matching and balun.

Typical performance

• VSWR < 1.5 over 430–440 MHztypical
• Gain ≈ 9–16 dBi for a 0.4–4.2 λ boomtypical
• 6 elements, 1.2 λ boom: ≈ 12 dBitypical
• Linear polarisationtypical

Typical values describe the antenna class, not a guarantee for a unit; “computed” marks our own simulated example.