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

💡 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.

• Which constraint becomes significant when turbines enter the Leidenfrost regime?
• Which outcome occurs when broadband light reflects off a thin oil film?
• Which consequence results when sustained high-energy particle bombardment dislodges atoms within a crystal lattice?
• Which outcome results when rapid sublimation occurs in a sealed container?
• Which outcome reduces transformer core heating when frequency increases?
• Which risk increases when a high-power microwave tube rapidly cycles through power states?