Basic Qualification · B-006 Feedlines and antenna systems · B-006-009-007
What is meant by antenna gain?
- A The ratio of the power radiated by an antenna compared to the transmitter power
- B The power amplifier gain minus the transmission line losses
- C The ratio of the radiated signal strength of an antenna to that of a reference antenna
- D The ratio of the signal in the forward direction to the signal in the back direction
Correct answer: C — The ratio of the radiated signal strength of an antenna to that of a reference antenna. From the official ISED question bank, verified word for word.
Why
Antenna gain measures how much stronger a signal becomes in a specific direction compared to a standard reference antenna, usually a simple dipole or isotropic radiator. 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.