The gain of an antenna is a measure of the antenna's ability to direct or focus radio energy over a region of space. High gain antennas have a more focused radiation pattern in a specific direction.
A measure of the effectiveness of a directional antenna in a given direction compared with a standard reference, usually an isotropic antenna. Specifically, the antenna gain is the ratio of the intensity radiated in a given direction from the antenna to the intensity of an isotropic source emitting the same power as the real antenna. Sometimes the term antenna gain is used in place of axial gain, which is the value of the antenna gain in the direction of the axis of the main lobe. See antenna pattern.
The ability of an antenna to "magnify" the energy received from the desired direction.
The ratio of the signal, usually expressed in dB, received or transmitted by a given antenna as compared to an isotropic or dipole antenna. Antenna gain can only be achieved by making an antenna directional, that is, with better performance in one direction than in others.
Refers to any increase or decrease in the strength of a wireless RF radio frequency signal when considering external antenna equipment. Gain is typically measured in terms of decibels (dB) or a number of times of magnification
This describes an antenna's transmission power as a ratio of its output (send) signal strength to its input (receive) signal strength. It is usually expressed in dBi; a higher dBi means a stronger antenna.
A measure of the change in an antenna's signal power amplification based on orientation or signal direction.
A relative measure of an antennas ability to direct or concentrate radio frequency energy in a particular direction or patterns. Typically measured in dBi or dBi d.
The gain of a particular antenna referred to a standard antenna such as a dipole or isotropic radiator.
The effectiveness of a directional antenna as compared to a standard nondirection antenna. It is usually expressed as the ratio in decibels of standard antenna input power to directional antenna input power that will produce the same field strength in the desired direction. For a receiving antenna, the ratio of signal power values produced at the receiver input terminals is used. The more directional an antenna is, the higher is its gain.
The ratio of a signal that is received or transmitted by a given antenna compared to an isotropic or dipole antenna, usually expressed in dB.
The ratio of the power required at the input of a loss-free reference antenna to the power supplied to the input of the given antenna to produce, in a given direction, the same field strength at the same distance (def. courtesy of Telecom Glossary 2000)
1. In technical terms, the gain is the ratio of the power required at the input of a loss-free reference antenna to the power supplied to the input of the given antenna to produce, in a given direction, the same field strength at the same distance. Antenna gain is usually expressed in decibels and the higher the gain the more powerful the energy output. Antennas with higher gain will be able to read tags from farther away. 2. The conductive element that radiates or receives energy in the radio frequency spectrum to and from the tag.
(Wireless) A perceived increase in signal strength related to how a specific antenna can focus signal power. Antenna gain establishes the radiation pattern and signal range.
In antenna design, gain is the logarithm of the ratio of the intensity of an antenna's radiation pattern in the direction of strongest radiation to that of a reference antenna. If the reference antenna is an isotropic antenna, the gain is often expressed in units of dBi (decibels over isotropic). For example, a dipole antenna has a gain of 2.14 dBi http://www.marcspages.co.uk/tech/antgain.htm.
