Which phenomenon limits the upper frequency of signal transmission in coaxial cables using distributed capacitance?

💡 Explanation

The distributed capacitance in a coaxial cable interacts with the signal frequency via a dielectric loss mechanism, where energy is dissipated as heat in the insulating material between the conductors, increasing attenuation. Therefore, signal attenuation due to dielectric losses results, rather than mismatch, expansion or external interference that depend on geometry, heat, or external fields.

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