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← ScienceWhich mechanism affects signal propagation when a coaxial cable's dielectric material degrades unevenly along its length?
A)Impedance mismatch causing reflections✓
B)Increased skin effect reducing bandwidth
C)Radiative losses due to surface currents
D)Dielectric breakdown generating harmonics
💡 Explanation
When the dielectric degrades unevenly, variations in permittivity occur because the impedance will not be constant, thus causing reflections of the signal along the line. Therefore reflections result throughout the cable, rather than losses, skin effect, or breakdown which require high frequencies or voltages.
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