Basic Qualification · B-006 Feedlines and antenna systems · B-006-009-010
The gain of an antenna, especially on VHF and above, is quoted in dBi. The "i" in this expression stands for:
- A integral
- B ionospheric
- C interpolated
- D isotropic
Correct answer: D — isotropic. From the official ISED question bank, verified word for word.
Why
The "i" in dBi stands for isotropic, which describes a theoretical antenna that radiates power equally in every direction like a perfect sphere. 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.