A transmitter radiates an EIRP of 1W into free space. A receive antenna located at 1km from the transmitter has a gain of 5dBi. Assume that there are 2dB of system loss.
A. If the system operates at 900MHz, what is the power level at the output of the receive antenna terminals?
B. What is the power level at the output of the receive antenna terminals if the system operates at 1800MHz?
C. How does the received signal level vary between cases A and B?
Explain what physically causes the received power to be different in these two cases, even though all other parameters do not change.