WiFoo..The.Secrets.of.Wireless.Hacking [Electronic resources] نسخه متنی

G

gain (antenna)

The relative increase in power or magnitude of a signal, typically measured in decibels. A method of increasing the transmission distances of a radio by concentrating its signal in a single direction, typically through the use of a directional antenna. Gain does not increase a radio's signal strength, but just redirects it. Therefore, as gain increases, the decrease in angle of coverage is inversely proportional.

GHz

gigahertz. One billion cycles per second. This is a unit of measure for frequency.

grid antenna

A type of antenna that uses an open-frame grid as a reflector rather than a solid one. The grid spacing is sufficiently small to ensure that waves of the desired frequency cannot pass through, and are hence reflected back toward the driven element.

ground

A connection between a device or circuit and the earth or some device serving as the earth.