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What are the power density and field strengths that might be realized in Problem 1.5 if a transmitting antenna with a gain of 15 dBi were used?

Problem 1.5

RF power of 100 Watts is radiated is otropically in free space. Calculate the power density 3 km from the source. Making a local plane wave approximation, calculate the values of electric field and magnetic field that this corresponds to.

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