Ok with Martin :)
What is called resonance frequency is a frequency for which the impedance is purely resistive (zero reactive). This frequency is independent of the impedance of the power supply line (50 Ω 600 Ω etc.)
The SWR that you measure with a NanoVNA, depending on the frequency, goes through minima that depend on the normalization impedance of the NanoVNA (50 Ω).
If you want to understand the difference, you have to switch successively from the SWR display to the Smith display.
Always remember to read the impedance expressed in the form A + jB
A is the resistive part in series with the reactive part, both expressed in ohms
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F1AMM
Fran?ois
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-----Message d'origine-----
De la part de Jakub Sutor?
Envoyé : mercredi 4 septembre 2024 11:05
