an antenna is radiating at a frequency of 10 GHz. What is the free-space path loss at a distance of 3 km from the Tx? Select the correct answer. Handwritten Calculation required. Choice one of the opinion.

Question

a) 100 dBW
b) 100 dBm
c) 122 dB
d) 100 dB

Answer 1

c) 122 dB
Calculation: Path Loss (dB) = 32.45 + 20 log(f) + 20 log(d)
Path Loss (dB) = 32.45 + 20 log(10 GHz) + 20 log(3 km)
Path Loss (dB) = 32.45 + 20(10) + 20(3)
Path Loss (dB) = 122 dB