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hfvhfdirectionalbeamlong-boom

5-Element Yagi

Five-element Yagi-Uda beam antenna

Source: Rothammel, Vol. 1, Ch. 16.5, p. 280
Input Parameters
MHz
mm
Results
Reflector
9.970m
Driven Element
9.527m
Director 1
9.043m
Director 2
8.923m
Director 3
8.802m
Spacing R → DE
3.180m
Spacing DE → D1
2.544m
Spacing D1 → D2
3.392m
Spacing D2 → D3
4.028m
Boom Length
13.145m
Gain
9.2dBd
Front-to-Back
20dB
Feed Impedance
18Ω
Beamwidth
52°
Diagram
R9.97DE9.53D19.04D28.92D38.803.182.543.394.03boom: 13.14 m
Radiation Pattern
-3 dB-10 dB-20 dB0 dB0°90°180°270°Max: 9.8 dBiF/B: 19.9 dB