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Electromagnetic Field Theory - Engineering

Q1:

Consider a loss less antenna with a directive gain of + 6 dB. If 1 mW of power is fed to it the total power radiated by the antenna will be

A 4 mW

B 1 mW

C 7 mW

D 1/4 mW

ANS:A - 4 mW

6 dB = 10 log10 = 100.6 3.98 Pr = 3.98 mW.