HB3YAQLucerne
Wavelength
Convert frequency to wavelength, half wave and quarter wave.
HB3YAQ · Ajdin HadzicLearning to take awayhttps://hb3yaq.ch/en/tools/wavelength
View saved items →Only in this browser
Loading calculator …
Formula & context
λ = c / f; L½ = λ · k / 2; L¼ = λ · k / 4
Wavelength is one complete spatial cycle. The factor applies only to the derived conductor lengths, not the free-space wavelength.
A worked example
At 299.792458 MHz, λ is exactly 1 m. With k = 0.95, the derived half and quarter waves are 0.475 m and 0.2375 m.
Assumptions & limits
Theoretical starting dimensions. Height, wire diameter, insulation and surroundings alter a real antenna’s resonance.
Frequency and wavelengthUnderstand the reasoning →From reading to experimenting
Wavelength
At 299.792458 MHz, λ is exactly 1 m. With k = 0.95, the derived half and quarter waves are 0.475 m and 0.2375 m.
Open example with starting values →Frequency: 299.792458 MHz · Velocity / shortening factor: 0.95 Back to the learning article →Then change exactly one value. Compare the result and use the formula to explain why it changes. The model limits below the calculator also apply here.