What type of antenna pattern is shown in Figure E9-2?

Q: What type of antenna pattern is shown in Figure E9-2?

The correct answer is A: Elevation. The correct answer is A: Elevation. The type of antenna pattern shown in Figure E9-2 is an elevation pattern. Elevation patterns show the radiation pattern in the vertical plane (up and down angles), while azimuth patterns show the horizontal plane (compass directions). Elevation patterns are important for understanding the take-off angle and how the antenna radiates at different elevation angles. This is crucial for understanding propagation - low take-off angles are better for long-distance communications, while higher angles are better for shorter distances. The pattern in Figure E9-2 shows how the antenna radiates at different elevation angles, which is characteristic of an elevation pattern. Azimuth patterns would show radiation in horizontal directions (like a compass rose).

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Deep Dive: E9B05

The correct answer is A: Elevation. The type of antenna pattern shown in Figure E9-2 is an elevation pattern. Elevation patterns show the radiation pattern in the vertical plane (up and down angles), while azimuth patterns show the horizontal plane (compass directions). Elevation patterns are important for understanding the take-off angle and how the antenna radiates at different elevation angles. This is crucial for understanding propagation - low take-off angles are better for long-distance communications, while higher angles are better for shorter distances. The pattern in Figure E9-2 shows how the antenna radiates at different elevation angles, which is characteristic of an elevation pattern. Azimuth patterns would show radiation in horizontal directions (like a compass rose).

Why Other Answers Are Wrong

Option B: Incorrect. An azimuth pattern shows radiation in the horizontal plane (compass directions), not the vertical plane. Figure E9-2 shows elevation angles, not azimuth directions. Option C: Incorrect. A 3D pattern would show both elevation and azimuth together, not just one plane. Figure E9-2 shows a 2D elevation pattern. Option D: Incorrect. A linear pattern isn't a standard antenna pattern type. The pattern shown is clearly an elevation pattern.

Exam Tip

Figure E9-2 pattern type = Elevation. Remember: Elevation patterns show radiation in the vertical plane (elevation angles). Azimuth patterns show horizontal directions. Figure E9-2 is an elevation pattern.

Memory Aid

**E**9-**2** **P**attern = **E**levation (think 'E9-2P = E')

Real-World Example

You're analyzing the antenna pattern in Figure E9-2. The pattern shows signal strength at different elevation angles (0° to 90°). This is an elevation pattern - it tells you the take-off angle and how the antenna radiates vertically. You can see the peak is at a low elevation angle, which is good for long-distance communications.

Source & Coverage

Question Pool: 2024-2028 Question Pool

Subelement: E9B

Reference: FCC Part 97.3

Key Concepts

Elevation pattern Antenna pattern Take-off angle Vertical plane

Official Pool Source

Question text and answer key are synchronized with the current NCVEC Extra Class pool and mapped to the E9B topic.