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

• 4 mW
• 1 mW
• 7 mW
• 1/4 mW

Correct Answer: 4 mW

Explanation:

6 dB = 10 log₁₀

⟹ = 10^0.6 ⟹ 3.98

P_r = 3.98 mW.