*Question G9B08:
How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?*  

*Correct Answer is  A: It steadily increases*  

### AI Response: (may contain errors)  

When considering the feed point impedance of a 1/2 wave dipole antenna, it's important to understand how impedance varies along the length of the antenna.

1. **Correct Answer Explanation (A: It steadily increases):**
   - At the center of a 1/2 wave dipole, the feed point impedance is typically around 72 to 75 ohms. This is where the current is maximum and the voltage is minimum.
   - As you move the feed point from the center towards the ends of the dipole, the impedance increases. This is because the current decreases and the voltage increases as you approach the ends of the dipole.
   - At the very ends of the dipole, the impedance becomes very high, theoretically approaching infinity, because the current is zero and the voltage is maximum.

2. **Why Other Choices Are Incorrect:**
   - **B: It steadily decreases**: This is incorrect because the impedance does not decrease as you move towards the ends; it increases.
   - **C: It peaks at about 1/8 wavelength from the end**: This is incorrect because the impedance does not peak at a specific point like 1/8 wavelength from the end. It continues to increase as you move towards the ends.
   - **D: It is unaffected by the location of the feed point**: This is incorrect because the feed point impedance is directly affected by the location along the dipole. It changes from low at the center to high at the ends.

3. **Useful Rule of Thumb:**
   - The impedance at the center of a 1/2 wave dipole is around 72 to 75 ohms.
   - Impedance increases as you move away from the center towards the ends, where it becomes very high.

Understanding these principles helps in designing and tuning antennas for optimal performance.