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Which effect is worsened when dielectric spacing decreases in resonant cavity waveguides at gigahertz frequencies?

A)Increased multipactor effect electron collisions
B)Decreased group velocity dispersion
C)Enhanced nonlinear optical response
D)Reduced ohmic energy dissipation

💡 Explanation

Decreasing dielectric spacing increases the electric field, therefore the multipactor effect becomes problematic because secondary electron emission intensifies, leading to collisions and potentially waveguide breakdown; rather than dispersion reduction, collisions are main concern for functionality.

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