dBi
0 synonyms and 0 antonyms for dBi, grouped by meaning and by how common each one is.
Noun — A unit of antenna gain, measuring in decibels how much more strongly an antenna radiates or receives in its best direction compared with a theoretical isotropic antenna that radiates equally in every direction. A higher dBi figure means a narrower, more focused beam and greater range in that direction.
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How to Use Dbi
The word patterns that sound natural to a native speaker.
Technical. Written with a lower-case d and capital B, as with all decibel units.
Etymology
From decibel plus i for isotropic, the idealised reference antenna against which the gain is measured.
Full origin of dBi →Frequently Asked Questions
What is the difference between dBi and dBd?
dBi compares an antenna with a theoretical isotropic radiator, while dBd compares it with a half-wave dipole. A dipole itself has about 2.15 dBi, so you convert by adding 2.15 to a dBd figure to get dBi.
Does a higher dBi antenna always mean better Wi-Fi?
No. Higher dBi does not add power, it concentrates it into a flatter, narrower beam. That helps over distance on one floor but can leave rooms above and below with a weaker signal than a lower-gain antenna would give.