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← ScienceWhich consequence reduces antenna's effective isotropic radiated power (EIRP) during atmospheric propagation?
A)Multipath interference causes signal fading✓
B)Antenna gain focuses signal perfectly
C)Refraction enhances signal propagation
D)Diffraction eliminates directional signal loss
💡 Explanation
Multipath interference reduces EIRP because reflected signals arrive out of phase, causing destructive interference which reduce signal strength; therefore the EIRP decreases, rather than being enhanced by refraction, perfect antenna gain, or eliminated diffraction.
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