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The radiation efficiency for antenna having radiation resistance 36.15Ω and loss resistance 0.85Ω is given by ________

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The radiation efficiency for antenna having radiation resistance 36.15Ω and loss resistance 0.85Ω is given by ________

(a) 0.977

(b) 0.799

(c) 0.997

(d) 0.779

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Right answer is (a) 0.977

Easy explanation: The radiation efficiency \(e_{cd}=\frac{R_r}{R_l+R_r}=\frac{36.15}{36.15+0.85}=0.977.\)

Radiation efficiency is also known as conductor-dielectric efficiency. It is the ratio of power delivered to the radiation resistance to the power delivered to it when conductor-dielectric losses are present.

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