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← ScienceWhich consequence results when frequency increases in waveguides?
A)Wave impedance approaches free space✓
B)Cutoff wavelength threshold increases
C)Group velocity magnitude declines sharply
D)Skin effect losses become negligible
💡 Explanation
Increasing frequency leads to a decrease in the guide wavelength, and therefore wave impedance approaches free space because mode propagation approaches transverse electromagnetic propagation rather than cutoff; therefore impedance matching improves rather than worsens.
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