1.

A satellite communication system includes a satellite located 20000 km above earth that operates at

11 GHz. The satellite has a directivity of 25 dB. Assume a total efficiency (per each antenna in the

system) of 90% and perfect polarization matching. If the satellite serves as the system receiver and

there is an additional transmitting antenna on earth with a directivity of 32 dB, find:

a. the free space transmission loss in dB.

b. the received power when the transmitted power is 400 W.