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What happens when the number of directors in a Yagi-Uda antenna is increased?

43. What happens when the number of directors in a Yagi-Uda antenna is increased?

1. When the number of directors in a Yagi-Uda antenna is increased, the gain and directivity are decreased
2. When the number of directors in a Yagi-Uda antenna is increased, the gain and directivity are increased
3. When the number of directors in a Yagi-Uda antenna is decreased, the gain and directivity are increased
4. No effect

Answer: A) When the number of directors in a Yagi-Uda antenna is increased, the gain and directivity are decreased.

Explanation:

When the number of directors in a Yagi-Uda antenna is increased, the gain and directivity are decreased, because adding additional directors allows the antenna to focus and concentrate emitted energy in the desired direction.