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Friis Transmission Equation

Consider a lo...

Question

Consider a lossless 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

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Solution

Ans : (b)

When an antenna is lossless then the antenna effciency is 100%. In such case whole of the power fed to antenna is radiated in the form of radiation. Therefore, if power fed to antenna is 1 mW then total radiated power is also 1 mW.

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