Question
Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?
Answer Options
- A) The physical length of the boom
- B) The number of elements on the boom
- C) The spacing of each element along the boom
- D) All these choices are correct
Correct Answer: D
Explanation
The performance parameters of a Yagi antenna (gain, F/B ratio, and bandwidth) are highly interdependent and determined by the precision of its mechanical design. The final optimization of these parameters requires manipulating the physical layout of the elements.
These adjustments include the length of the boom (which determines the maximum number of elements), the number of elements (which dictates potential gain), and the spacing of each element along the boom (which tunes the phase relationship). Since all these factors affect the final performance characteristics, all these choices are correct when optimizing a Yagi.
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