Question
What is meant by the “main lobe” of a directive antenna?
Answer Options
- A) The magnitude of the maximum vertical angle of radiation
- B) The point of maximum current in a radiating antenna element
- C) The maximum voltage standing wave point on a radiating element
- D) The direction of maximum radiated field strength from the antenna
Correct Answer: D
Explanation
The radiation pattern of a directive antenna (like a Yagi) is represented by lobes, which are areas of concentrated radiation. The main lobe is the largest and most intense of these lobes.
It defines the principal operational direction of the antenna. The main lobe is formally defined as the direction of maximum radiated field strength from the antenna. This is the direction in which the antenna is designed to transmit or receive the strongest signal.
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