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dBi

 ¾ÈÅ׳ª À̵æÀ» Ç¥ÇöÇÏ´Â °æ¿ì¿¡, ÀÚÀ¯°ø°£ µî¹æ¼º ¾ÈÅ׳ªÀÇ 0 dB À̵æÀ» ±âÁØÀ¸·Î ÇÏ¿© ¾î¶² ¾ÈÅ׳ªÀÇ À̵æÀ» dB ·Î Ç¥ÇöÇÑ °ª.
 Abbreviation. In the expression of antenna gain, the number of decibels of gain of an antenna referenced to the zero dB gain of a free-space isotropic radiator.
http://www.its.bldrdoc.gov/fs-1037/