Ham Radio General Class Practice Test

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Which of the following is an advantage of a log periodic antenna?

Wide bandwidth
Higher gain per element than a Yagi antenna
Harmonic suppression
Polarization diversity

The correct answer is: Wide bandwidth

A log periodic antenna is designed to provide a wide bandwidth, which is one of its most significant advantages. Unlike many other types of antennas, which may only perform well over a narrow range of frequencies, a log periodic antenna can cover a broader spectrum effectively. This is particularly useful in applications where the operator may want to transmit or receive signals across multiple frequencies without needing to switch antennas or make adjustments. The design of the log periodic antenna, consisting of a series of dipole elements arranged in a specific frequency-dependent pattern, allows it to maintain efficiency and performance across a vast frequency range. This characteristic makes it an excellent choice for amateur radio operators who may want to utilize various bands or who deal with wideband signals. While other antennas like the Yagi may offer higher gain or improved directivity for particular frequencies, they typically do not match the wide bandwidth capability of the log periodic design. Therefore, recognizing the wider operational frequency range and adaptability of the log periodic antenna highlights its primary strength in versatility and performance.