Basic Qualification · B-006 Feedlines and antenna systems · B-006-008-005
Adding a series inductance to an antenna would:
- A increase the resonant frequency
- B increase its useful bandwidth
- C reduce atmospheric noise pickup
- D decrease the resonant frequency
Correct answer: D — decrease the resonant frequency. From the official ISED question bank, verified word for word.
Why
Adding a series inductance to an antenna acts like adding weight to a spring, making the system slower to oscillate and therefore lowering the resonant frequency. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.