Deep Dive: G9D06
The correct answer is A: Wide bandwidth. An advantage of a log-periodic antenna is wide bandwidth. Log-periodic antennas are designed to work over a wide frequency range with consistent performance. For amateur radio operators, this makes them ideal for multiband operation. Understanding this helps when selecting antennas.
Why Other Answers Are Wrong
Option B: Incorrect. Log-periodic doesn't have higher gain per element than Yagi - Yagis typically have higher gain per element. Higher gain per element isn't the advantage. Option C: Incorrect. Log-periodic doesn't have harmonic suppression - it works on multiple frequencies, not suppressing harmonics. Harmonic suppression isn't the advantage. Option D: Incorrect. Log-periodic doesn't have polarization diversity - it's typically single polarization. Polarization diversity isn't the advantage.
Exam Tip
Log-periodic advantage = wide bandwidth. Think 'L'og-'P'eriodic = 'L'arge 'P'assband (wide bandwidth). Log-periodic antennas are designed to work over a wide frequency range with consistent performance. Not higher gain per element, not harmonic suppression, not polarization diversity - just wide bandwidth.
Memory Aid
Log-periodic advantage = wide bandwidth. Think 'L'og-'P'eriodic = 'W'ide 'P'assband. Log-periodic antennas are designed to work over a wide frequency range with consistent performance. Ideal for multiband operation.
Real-World Example
A log-periodic antenna: It works over a wide frequency range (e.g., entire HF band) with consistent performance. Unlike Yagis which are narrow-band, log-periodics have wide bandwidth - they maintain good performance across a wide frequency range. This makes them ideal for multiband operation. Wide bandwidth is the key advantage.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G9D
Reference: 2023-2027 Question Pool · G9 - Antennas and Feed Lines
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G9D topic.