*Question G9D06:
Which of the following is an advantage of a log-periodic antenna?*  

*Correct Answer is  A: Wide bandwidth*  

### AI Response: (may contain errors)  

The correct answer to the question about the advantages of a log-periodic antenna is:

**A: Wide bandwidth**

### Explanation:

1. **Why the correct answer is correct:**
   - A log-periodic antenna is designed to operate over a wide range of frequencies. Its structure allows it to maintain a consistent radiation pattern and impedance across this range, making it ideal for applications that require versatility in frequency use. This wide bandwidth is one of the key features that distinguishes log-periodic antennas from other types.

2. **Why the other choices are incorrect:**
   - **B: Higher gain per element than a Yagi antenna**: While log-periodic antennas can have good gain, they typically do not achieve the same level of gain per element as a Yagi antenna. Yagi antennas are specifically designed for high gain in a particular direction, while log-periodic antennas prioritize bandwidth over maximum gain.
   - **C: Harmonic suppression**: Log-periodic antennas do not inherently provide harmonic suppression. They are designed for wideband operation, but they do not specifically filter out harmonics. Other antenna types or additional filtering techniques are usually employed for harmonic suppression.
   - **D: Polarization diversity**: Log-periodic antennas are generally designed for a specific polarization (usually horizontal or vertical), similar to other antenna types. They do not inherently provide polarization diversity, which would require multiple antennas or specific designs to achieve.

### Useful Concepts:
- **Bandwidth**: The range of frequencies over which the antenna operates effectively. Log-periodic antennas are known for their ability to cover a wide bandwidth, often several octaves.
- **Gain**: The ability of an antenna to direct radio frequency energy in a particular direction compared to a reference antenna (like a dipole). Yagi antennas are optimized for higher gain in a specific direction.

In summary, the log-periodic antenna's primary advantage is its wide bandwidth, making it suitable for applications that require operation over multiple frequencies.