Download Aptitude Crack
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Communication Systems - Engineering

Q1:

In a satellite transponder the power amplifier feeds power P to the transmitting antenna of gain G. If distance of earth is d, the power flux density is

A PG/d

B PG/4pd2

C P/G(4pd2)

D

ANS:B - PG/4pd2

Available power is PG and is spread over 4 nd2.