Advanced Qualification · A-007 Feedlines and matching · A-007-008-004
What is the term for the ratio of the radiation resistance of an antenna to the total resistance of the system?
- ABeamwidth
- BEffective Radiated Power
- CRadiation conversion loss
- DAntenna efficiency
Correct answer: D — Antenna efficiency. From the official ISED question bank, verified word for word.
Why
Antenna efficiency measures how well an antenna turns electrical power into radio waves by comparing the useful radiation resistance to the total resistance, which includes losses from heat in the wires and ground. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching is section A-007 of the Advanced exam: Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.
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