*Question G9D03:
In which direction is the maximum radiation from a VHF/UHF “halo” antenna?*  

*Correct Answer is  C: Omnidirectional in the plane of the halo*  

### AI Response: (may contain errors)  

The correct answer to the question about the maximum radiation direction from a VHF/UHF "halo" antenna is:

**C: Omnidirectional in the plane of the halo.**

### Explanation of the Correct Answer:
- A halo antenna is a type of loop antenna that is typically mounted horizontally. 
- It radiates equally in all directions within the plane of the loop, which is why it is described as **omnidirectional** in that plane.
- This characteristic makes it effective for VHF/UHF communications, as it can receive and transmit signals from multiple directions without a specific focus.

### Why the Other Choices are Incorrect:
- **A: Broadside to the plane of the halo**
  - This is incorrect because a halo antenna does not have a broadside radiation pattern. Instead, it radiates uniformly in the plane of the halo.
  
- **B: Opposite the feed point**
  - This choice is misleading. While some antennas have maximum radiation in a direction opposite the feed point, a halo antenna does not follow this pattern. Its radiation is not directed away from the feed point but rather spreads out in the plane of the halo.
  
- **D: On the same side as the feed point**
  - This is also incorrect. The maximum radiation is not concentrated on the same side as the feed point. Instead, the radiation is distributed evenly around the loop in the plane.

### Summary:
- Halo antennas are designed to provide omnidirectional radiation in the plane of the antenna.
- Understanding the radiation pattern of different antennas is crucial for effective communication in amateur radio.

This knowledge will help you answer similar questions on the Extra Class exam regarding antenna characteristics and radiation patterns.