Question: Hi, I was going over some study material and came across this problem, I could use some help. a. Answers to 3 significant figures. Show

Hi, I was going over some study material and came across this problem, I could use some help.

a. Answers to 3 significant figures. Show working .

i, Calculate the received power per square metre from a GPS transmitter that is 20 000 km above the surface of the Earth and transmitting at a power of 35 W at a GPS receiver on the surface of the Earth.

ii. If the antenna in (i) is 10 cm x 10 cm in size calculate the received power in Watts.

Assume the power transmitted by the GPS transmitter is fully received by the GPS receiver.

b. A mobile user who is 200 m from a particular base station has a received signal power of 2 mW. Use the inverse-fourth power relationship to find an approximation for the received signal power for a mobile user who is 800 m from the same base station.

Answer to 3 significant figures, show working

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