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← ScienceWhich outcome happens when a waveguide supporting microwave transmission forms a sharp bend?
A)Impedance matching becomes more effective
B)Mode conversion increases signal attenuation✓
C)Cutoff frequency shifts to lower levels
D)Wave velocity achieves more stability
💡 Explanation
Mode conversion causes attenuation when the waveguide bends sharply, because the bend disrupts the transverse electromagnetic field distribution. Therefore, energy is lost to unwanted modes, rather than being efficiently transmitted at the intended frequency.
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