Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?
The physical length of the boom
The number of elements on the boom
The spacing of each element along the boom
All these choices are correct✓الإجابة الصحيحة
الشرح
All three of a Yagi's performance figures come out of the same design variables, and boom length, element count and element spacing all interact, so each of them can be adjusted to trade gain against front-to-back ratio and SWR bandwidth.