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← ScienceWhich outcome occurs when a higher dielectric material fills a parallel plate waveguide at frequencies near cutoff?
A)Increased signal propagation velocity occurs
B)Reduced wave impedance is experienced✓
C)Enhanced energy transmission efficiency occurs
D)Decreased waveguide bandwidth limitation results
💡 Explanation
Reduced wave impedance results because adding a higher dielectric material alters the waveguide's *capacitance per unit length*; rather than increase velocity, the increased capacitance causes a lower impedance because impedance relates to capacitance inversely therefore influencing wave propagation characteristics.
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