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Question: problem 1 20 points find the farfield distance in meters...

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Problem 1 (20 points) Find the far-field distance in meters for a cellular phone antenna , which uses /4 dipole antenna, and it operates on the frequency 2.1 GHz (4G band). Problem 2 (25 points) Topic: Free space propagation model A mobile is located 10 km away from a base station and uses an antenna with the gain of 0 dB to receive a radio signal. The E-field at 1 km from the transmitter is measured to be 102 V/m. The carrier frequency used by mobile is 1.5 GHz. - Find the received power in dBm at the mobile receiver by using the free space propagation model Problem 3. (20 points) If the received power at a reference distance do 1 kmis equal to 1 μW, find the received powers in dBm at the distances of 2 km from the same transmitter for the free space path loss models: Pr=
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