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    Attenuation of received power with frequency and distance change

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    How much would be the attenuation of the power received, if transmission frequency is tripled or if the distance between transmitting antenna and receiving antenna is tripled?

    a) 24 dB
    b) 20 dB
    c) 10 dB
    d) 16 dB

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    Solution Preview

    Recall that path loss, or signal attenuation, in free space is given by:

    PL = (4*pi*d/lambda)^2, where lambda = c/f

    So PL = (4*pi*d*f/c)^2

    It is clear that tripling either frequency or ...

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    This solution helps with a question about attenuation of received power.