The DBI module enables your Perl applications to access multiple database types transparently. You can connect to MySQL, MSSQL, Oracle, Informix, Sybase, ODBC, and other database systems without having to know the different underlying interfaces of each. The API defined by DBI will work on all these database types and many more.

The relative gain of an antenna with respect to an equivalent isotropic antenna, expressed on the decibel logarithmic scale.

The number of decibels of gain of an antenna referenced to the zero decibel gain of a free-space isotropic radiator or antenna. The important thing to remember is this ... every 3 dBi is a gain of about two times the previous power level or signal strength. So .... when they say an antenna has a gain of X ... it means ... 3 dBi is a gain of about 2 times over the base signal strength (2 raised to the 1st power). 6 dBi is a gain of about 4 times the signal strength over no antenna at all. (2 raised to the 2nd power). 15 dBi is ... first, 15/3 or 5, then 2 raised to that power ... or about 32 times the signal strength of no antenna at all... and that's a lot

Perl's abstract DataBase Interface which supports any database product with a database driver (DBD)

Decibels compared to an isotropic antenna. An antenna's gain is often measured in decibel strength compared to an isotropic antenna, a theoretical, perfect antenna whose range is 360 degrees in all directions. The higher the dBi, the stronger the antenna.

Decibels relative to an isotrope. (See also Decibel and Isotrope)

Gain of an antenna compared to a standard isotropic radiator

dBi stands for decibels over isotropic and is the unit of measure for the gain of an antenna.

Decibels referenced to an "ideal" isotropic radiator in free space; frequently used to express antenna gain.

decibels with respect to an isotropic radiator (antennas)

A ratio, measured in decibels, of the effective gain of an antenna compared to an isotropic antenna. The greater the dBi value, the higher the gain and, as such, the more acute the angle of coverage.

Gain in decibels referenced to an isotropic radiator. An isotropic radiator is a theoretical antenna with equal gain to all points on isotropic sphere. 2.15 dBi = 0 dBd

A technique for expressing a power gain measurement in logarithmic form using a theoretical isotropic antenna as a reference.

The dB power relative to an isotropic source.

A ratio of decibels to an isotropic antenna that is commonly used to measure antenna gain. The greater the dBi value, the higher the gain and, as such, the more acute the angle of coverage.

Decibel, Isotropic; decibel referenced to the gain of a theoretical isotropic radiator.

The power in Decibel (dB) relative to an isotropic source.

The dB (decibel) power in relation to an isotropic source