Question
How can the output voltage of a multiple-turn receiving loop antenna be increased?
Answer Options
- A) By reducing the permeability of the loop shield
- B) By utilizing high impedance wire for the coupling loop
- C) By increasing the number of turns and/or the area enclosed by the loop
- D) All these choices are correct
Correct Answer: C
Explanation
The output voltage induced in a receiving loop antenna is proportional to the total magnetic flux captured by the loop. The factors affecting the induced voltage are governed by the geometry of the loop relative to the incoming magnetic field.
The output voltage of a multiple-turn receiving loop antenna is increased by increasing the number of turns and/or the area enclosed by the loop. More turns mean more conductors are intercepting the magnetic flux, and a larger area means more magnetic flux is captured. Both changes increase the total voltage induced into the receiving antenna.
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