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← ScienceWhich consequence results when a microwave waveguide's impedance varies periodically?
A)Increased signal attenuation✓
B)Decreased resonant frequency
C)Enhanced parametric amplification
D)Suppressed harmonic generation
💡 Explanation
Increased signal attenuation occurs because of wave interference due to the impedance variations; periodic impedance mismatch causes reflection. The mechanism propagating this is Bragg scattering, back-reflection accumulating destructively. Therefore, attenuation increases rather than alternatives happening with consistent impedance.
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