*Question G0A10:
What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?*  

*Correct Answer is  C: Take precautions to ensure that the antenna cannot be pointed in their direction when they are present*  

### AI Response: (may contain errors)  

When evaluating RF exposure, it's important to ensure that your antenna setup does not expose neighbors to RF levels above the allowable limits. Here's why the correct answer is correct and why the other choices are not:

1. **Correct Answer: C - Take precautions to ensure that the antenna cannot be pointed in their direction when they are present**

   - **Explanation**: The main lobe of a directional antenna is where the majority of the RF energy is concentrated. If a neighbor is in the path of this main lobe, they could be exposed to RF levels exceeding the safety limits. By ensuring that the antenna cannot be pointed in their direction when they are present, you effectively reduce their exposure to RF energy. This is a practical and direct method to mitigate the risk of excessive RF exposure.

2. **Why the Other Choices are Incorrect**:

   - **A: Change to a non-polarized antenna with higher gain**
     - **Explanation**: Changing to a non-polarized antenna with higher gain does not necessarily reduce RF exposure. In fact, higher gain antennas can concentrate more power in a specific direction, potentially increasing exposure in that direction.

   - **B: Use an antenna with a higher front-to-back ratio**
     - **Explanation**: A higher front-to-back ratio means the antenna is more directional, which can help reduce radiation in the opposite direction of the main lobe. However, it does not address the issue of exposure in the direction of the main lobe where the neighbor is located.

   - **D: All these choices are correct**
     - **Explanation**: Since choices A and B do not effectively address the problem of reducing RF exposure in the direction of the main lobe, this option is incorrect.

3. **Useful Considerations**:

   - **RF Exposure Limits**: The FCC has established limits for RF exposure to ensure safety. It's important to evaluate your setup to ensure compliance.
   - **Directional Antennas**: These antennas focus energy in a specific direction, which can be beneficial for communication but requires careful consideration of where the energy is directed to avoid excessive exposure.

By understanding these points, you can ensure that your antenna setup is both effective and safe for those around you.