Antenna Model · Designer · published-design
Yagi-Uda
λ = 41.93 m @ 7.150 MHz · DL6WU / NBS TN-688 / ARRL
FIG.1 · YAGI-UDA
Reflector
20.173m
Driven element
19.197m
Director 1
17.977m
Accuracy note
Parametric starting design — optimise in NEC; ±few % on lengths.
Parametric starting design — optimise in NEC; ±few % on lengths.
Method published-design Cite DL6WU / NBS TN-688 / ARRL Feed ~20–30 Ω — match with a gamma, hairpin, or beta match to 50 Ω.
- A parametric starting design — element lengths shift with boom and element diameter.
- Optimise and verify gain / F-B in an antenna modeller (NEC) before building.