What is the primary effect of increasing boom length and adding directors to a Yagi antenna?
Gain increases✓پاسخ درست
Beamwidth increases
Front-to-back ratio decreases
Resonant frequency is lower
توضیح
The gain of an end-fire array grows with its length in wavelengths, so a longer boom with more directors increases gain. Beamwidth moves the other way, narrowing as gain rises, and the front-to-back ratio is not what the change primarily buys.