The calculator allows you to automate the calculation of losses in a coaxial cable.
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The attenuation per unit length (basic loss) in a coaxial cable (dB/m) at radio frequencies can be approximately determined by the formula:
Where f — frequency (MHz),
k1 — coefficient characterizing the loss in the conductors (takes into account the skin effect), proportional to the root of the frequency,
k2 — factor, characterizing the loss in the dielectric of the internal insulation, proportional to the frequency. On the microwave, prevail.
For most coaxial cable types, the factors k1 and k2 are individual. The calculator uses this formula with a simplified algorithm, with an accuracy sufficient for estimating calculations.
The calculator also takes into account the mismatch loss, which consists of two components:
- Additional thermal loss due to high SWR — extra loss. The calculation uses the following expressions:
- Loss due to the fact that not all the energy goes to the load and part of it returns to the source — mismatch loss. The calculation uses the following equations:
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