Which effect arises when a high-power microwave source exceeds its coupling limit?

💡 Explanation

Plasma formation leads to microwave cutoff in the propagation channel because dielectric breakdown ionizes the air via impact ionization, acting as a reflector. Therefore transmission ceases beyond threshold rather than increasing, due to ohmic losses reducing cavity Q or enhancing signals.

• Which outcome results in a superconducting coil when persistent current experiences a slowly increasing external flux bias?
• Which consequence results from increased fluid velocity in pipelines?
• Which failure consequence occurs when exceeding capacitor ripple current limits?
• Which consequence results when stressed polymers alter polarization?
• Which outcome occurs when temperature increases past the oxidation onset temperature of a metal alloy?
• Which consequence results when dielectric strength fails in HVDC capacitor?