CWNA-109 · Question #40
CWNA-109 Question #40: Real Exam Question with Answer & Explanation
The correct answer is C. Isotropic radiator. An isotropic radiator is a theoretical point source of electromagnetic radiation that radiates equally in all directions. It has no physical dimensions and no preferred direction of radiation. It is used as a reference for antenna gain because it represents the ideal case of a pe
Question
Options
- AEnd-fire radiator
- BDipole radiator
- CIsotropic radiator
- DAnthropomorphic radiator
Explanation
An isotropic radiator is a theoretical point source of electromagnetic radiation that radiates equally in all directions. It has no physical dimensions and no preferred direction of radiation. It is used as a reference for antenna gain because it represents the ideal case of a perfect omnidirectional Antenna gain is a measure of how well an antenna concentrates its radiated power in a certain direction. It is expressed in decibels (dB) relative to a reference antenn a. When the reference antenna is an isotropic radiator, the antenna gain is denoted by dBi, which stands for decibels relative to isotropic.
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