Question
What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?
Answer Options
- A) 8 feet
- B) 16 feet
- C) 24 feet
- D) 33 feet
Correct Answer: D
Explanation
The physical length of a half-wave dipole antenna is determined by the formula: L_{\text{feet}} = 468 / F_{\text{MHz}}, where F_{\text{MHz}} is the design frequency in megahertz. This formula includes a standard velocity factor correction for typical wire thickness.
Using the given frequency F = 14.250 \text{ MHz}: L_{\text{feet}} = \frac{468}{14.250} \approx 32.84 \text{ feet.} The approximate length for the dipole is 33 feet. This length is the total length of the two radiating elements combined.
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