Which mechanism increases propagation loss in dielectric waveguide at higher frequencies?

A)Material absorption from molecular resonance✓

B)Conductor loss from surface current density

C)Radiation loss from impedance mismatch

D)Dielectric breakdown from electric field stress

💡 Explanation

At higher frequencies, increased material absorption occurs because the electromagnetic wave's energy more closely matches molecular vibrational energy levels within the dielectric material, leading to increased energy dissipation. Therefore, material absorption increases propagation loss, rather than conductor, radiation, or breakdown effects that have distinct origins.

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Which mechanism increases propagation loss in dielectric waveguide at higher frequencies?

💡 Explanation

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