A communication link operating at 3 GHz has a 22.5 W transmitter connected to an antenna of 2.5 m2 effective aperture. The receiving antenna has an effective aperture of 0.5 m2 and is located at 15 km line-of-sight distance from the transmitting antenna (assume lossless, matched antennas). The power delivered to the receiver is:

A communication link operating at 3 GHz has a 22.5 W transmitter conne

1.	A communication link operating at 3 GHz has a 22.5 W transmitter connected to an antenna of 2.5 m2 effective aperture. The receiving antenna has an effective aperture of 0.5 m2 and is located at 15 km line-of-sight distance from the transmitting antenna (assume lossless, matched antennas). The power delivered to the receiver is:
A.	12.5 μW
B.	125 μW
C.	12.5 mW
D.	125 mW
Answer» B. 125 μW

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