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hfwiremultibandend-fedportable

EFHW (End-Fed)

End-fed half-wave antenna with 49:1 UnUn

Source: Rothammel, Vol. 1, Ch. 10.2, p. 170-172
Input Parameters
MHz
Results
Wire Length (λ/2)
20.07m
End-Fed Impedance
2500Ω
Transformer Ratio
49: 1
Primary : Secondary Turns
7
2nd Harmonic
14.20MHz
3rd Harmonic
21.30MHz
4th Harmonic
28.40MHz
Diagram
49:150 Ω20.07 mUnUnopen end
Radiation Pattern
-3 dB-10 dB-20 dB0 dB0°90°180°270°Max: 2.1 dBi