Question
When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?
Answer Options
- A) Its overall length must not exceed 1/4 wavelength
- B) It must be mounted more than 1 wavelength above ground
- C) It should be configured as a four-sided loop
- D) It should be at least one wavelength long
Correct Answer: D
Explanation
The Beverage antenna is a type of traveling wave antenna used primarily for receiving on the LF and low HF bands (like 160 meters). It is a long, horizontal wire that is terminated at the far end with a resistor to absorb power and prevent reflections.
To achieve good directional characteristics and effective operation as a traveling wave antenna at the desired frequency, the Beverage antenna should be at least one wavelength long. The longer the wire (up to several wavelengths), the greater the achievable gain and the narrower the resulting cardioid-like directional pattern, which is essential for reducing noise and interference.
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