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if the received power at a reference distance do=1km, is equal to 1 microwatt, Find the...

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Electrical Engineering

if the received power at a reference distance do=1km,is equal to 1 microwatt, Find the received power at distances 21km,5km,10km and 20km from the same transmitters.
I) free space
ii) n=4
iii) two ray ground reflection using the exact expression.
Assume f=1800MHz.
ht=40,
hr= 3m, Gt=Gr= 0db.

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