FieldengRF, Radio & Wireless
Electrical Cable Length
Wavelengths and propagation delay in a cable given velocity factor.
RF, Radio & Wireless
Wavelengths and propagation delay in a cable given velocity factor.
App id: RF-14. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
λ_cable = VF × c / f; t = L / (c × VF)Inputs
| Name | Unit |
|---|---|
| Frequency | MHz |
| Physical length | m |
| Velocity factor | fraction |
Outputs
| Name | Unit |
|---|---|
| Electrical length (hero result) | 1 |
| Cable wavelength | m |
| Propagation delay | ns |
Diagnose
This tool does not attach diagnose observations.
Assumptions
- Constant VF. Does not include connectors or frequency-dependent VF.
Provenance
- v = c × VF. Typical solid PE coax ≈ 0.66, foam ≈ 0.80–0.85.