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the relations between the dBi and the distance?
there are meny uses of antenna with out antenna the wireless comminicatin is not possible
very scope in satellite (line of site) LOS
television broadcasting
cell phone
bts and more
The antenna need is decided my application.The antenna with narrow band application are used in different places.The antenna gain is according to the distance and pattern of the antenna
when you have a large distance you have small db (good db)
