Advanced Qualification · A-007 Feedlines and matching · A-007-008-002
Why would one need to know the radiation resistance of an antenna?
- A To match impedances for maximum power transfer
- B To measure the near-field radiation density from a transmitting antenna
- C To calculate the front-to-side ratio of the antenna
- D To calculate the front-to-back ratio of the antenna
Correct answer: A — To match impedances for maximum power transfer. From the official ISED question bank, verified word for word.
Why
Radiation resistance represents the part of an antenna's electrical resistance that actually turns power into radio waves. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.