Question

An antenna has a radiation resistance of 72 ohm,a loss resistance of 8 ohm and a power gain of 16.what is it's directivity

Answer 1

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Answer 2

Answer:

Explanation:

Power Gain (G)=Efficiency * Directivity

Efficiency=Radiation Resistance/(Radiation Resistance+Loss Resistance)

Efficiency=72/(72+8)=0.9

Now G=16

Directivity=G/Efficiency

Directivity=16/0.9=17.777

Ans: 17.777