Question
Which of the following would increase the bandwidth of a Yagi antenna?
Answer Options
- A) Larger-diameter elements
- B) Closer element spacing
- C) Loading coils in series with the element
- D) Tapered-diameter elements
Correct Answer: A
Explanation
Antenna bandwidth is the range of frequencies over which the antenna maintains a low Standing Wave Ratio (SWR) and performs efficiently. For a Yagi antenna, which is already a complex, tuned system, maximizing bandwidth is critical for reliable operation.
Antenna theory dictates that increasing the diameter of the radiating element (the conductor thickness) widens the bandwidth. Therefore, using larger-diameter elements (such as thick aluminum tubing instead of thin wire) is the most effective way to increase the usable frequency range of a Yagi antenna without sacrificing too much gain.
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