In radiative coupling, the emitter radiation field_____________?
Correct answer: A. Decays as 1 / R, where R is the separation distance between the emitter and the receptor
- A. Decays as 1 / R, where R is the separation distance between the emitter and the receptor
- B. Decays as R, where R is the separation distance between the emitter and the receptor
- C. Decays as 1 / 2 R, where R is the separation distance between the emitter and the receptor
- D. Decays as 2R, where R is the separation distance between the emitter and the receptor
Explanation
In the far-field region, the radiated electric and magnetic field amplitudes spread spherically and decrease inversely with distance, as 1/R. Radiated power density decreases as 1/R², which is a common source of confusion.
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