Discussion
Statement I: Rain attenuation increases with frequency.
Statement II: Rain attenuation is effectively removed by frequency diversity.
In the light of the above statements, choose the correct answer.
Answer: A
The first is correct and steeply so above ten gigahertz. The second is wrong, because rain attenuates a whole band nearly equally and two nearby carriers fade together, leaving no independence for diversity to exploit. Route diversity, with a second path outside the rain cell, is the effective answer. The pair illustrates that a countermeasure works only where the impairment it addresses is genuinely independent between the two branches.
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