*Question E9B05:
What type of antenna pattern is shown in Figure E9-2?*  

*Correct Answer is  A: Elevation*  

### AI Response: (may contain errors)  

The correct answer to the question about the antenna pattern shown in Figure E9-2 is **Elevation**. Here’s a breakdown of why this is the case and why the other options are incorrect:

### Why the Correct Answer is Correct:
- **Elevation Pattern**: The elevation pattern of an antenna describes how the antenna radiates power in the vertical plane. It shows the gain of the antenna as a function of the angle above or below the horizontal plane. This is crucial for understanding how well the antenna can communicate with stations at different heights.

### Why the Other Choices are Incorrect:
- **A: Azimuth**: The azimuth pattern describes the radiation characteristics in the horizontal plane. It shows how the antenna radiates power around it at a fixed elevation angle. Since the question specifies the pattern shown is elevation, this choice is not applicable.

- **C: Near Field**: The near field refers to the region close to the antenna where the electromagnetic fields are not yet radiating as a plane wave. This is not a type of antenna pattern but rather a region of field behavior, making this choice incorrect.

- **D: Polarization**: Polarization refers to the orientation of the electric field of the radio wave (e.g., horizontal or vertical). While important for matching antennas, it does not describe the radiation pattern itself, thus making this choice incorrect.

### Useful Concepts:
- **Antenna Patterns**: 
  - **Elevation Pattern**: Shows gain vs. angle in the vertical plane.
  - **Azimuth Pattern**: Shows gain vs. angle in the horizontal plane.
  
- **Key Terms**:
  - **Gain**: A measure of how well an antenna converts input power into radio waves in a specified direction.
  - **Radiation Pattern**: A graphical representation of the relative strength of the radio waves emitted by the antenna as a function of direction.

Understanding these concepts will help you identify and differentiate between various antenna patterns on the exam.