Question
What is the primary effect of increasing boom length and adding directors to a Yagi antenna?
Answer Options
- A) Gain increases
- B) Beamwidth increases
- C) Front-to-back ratio decreases
- D) Resonant frequency is lower
Correct Answer: A
Explanation
Directors are the parasitic elements placed in front of the driven element of a Yagi antenna. They act to focus the energy and increase the signal strength in the forward direction.
By increasing the boom length and placing more directors along it, the antenna achieves a greater focusing effect. The primary result is that the antenna gain increases, meaning more of the transmitted power is concentrated into a narrower beam, resulting in a stronger signal at the distant receiver.
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