Which risk increases when a microwave waveguide's impedance is mismatched?

💡 Explanation

When a waveguide impedance is mismatched, reflection occurs because wave propagation is disrupted at the discontinuity, causing power to bounce back toward the source, potentially damaging it. Therefore reflected power damaging the source is the risk, rather than polarization shift, frequency drift, or bandwidth increase, which result from different waveguide imperfections or issues.

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