Radio Amateur Quiz Canadian License

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Question A-007-006-003

What is the Effective Radiated Power of an amateur transmitter, if the transmitter output power is 200 watts, the transmission line loss is 5 watts, and the antenna power gain is 3 dBd?

Correct Answer

390 watts

Explanation

Power delivered to antenna = Transmitter output - Line loss = 200W - 5W = 195W. Antenna gain = 3dBd (power ratio of 2). ERP = Power to antenna × Antenna gain = 195W × 2 = 390W.

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