*Question G9B09:
Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?*  

*Correct Answer is  A: Lower ground losses*  

### AI Response: (may contain errors)  

When comparing horizontally polarized and vertically polarized HF antennas, one key advantage of horizontal polarization is lower ground losses. Here's why:

1. **Correct Answer: Lower ground losses (A)**
   - **Explanation**: Horizontally polarized antennas generally experience lower ground losses compared to vertically polarized antennas. This is because the electric field of a horizontally polarized wave is parallel to the ground, which reduces the interaction with the ground and thus minimizes losses. This is particularly beneficial for antennas that are not very high above the ground.

2. **Why the other choices are incorrect:**
   - **Lower feed point impedance (B)**: The feed point impedance of an antenna is not inherently lower for horizontal polarization. Impedance depends on various factors, including antenna design and height above ground, rather than polarization alone.
   - **Shorter radials (C)**: Radials are typically associated with vertical antennas, where they act as a ground plane. Horizontal antennas, like dipoles, do not use radials in the same way, so this choice is not relevant.
   - **Lower radiation resistance (D)**: Radiation resistance is a measure of how effectively an antenna radiates power. It is not directly related to polarization. Horizontal antennas do not inherently have lower radiation resistance compared to vertical antennas.

In summary, the primary advantage of a horizontally polarized HF antenna is its reduced interaction with the ground, leading to lower ground losses. This can improve the efficiency of the antenna system, especially when the antenna is close to the ground.