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Antenna Gain. The term Antenna Gain describes how much power is transmitted in the direction of peak radiation to that of an isotropic source. Antenna gain is more commonly quoted than directivity in an antenna's specification sheet because it takes into account the actual losses that occur.
Antenna gain is a critical concept in wireless communication. Represented by 'G', it measures the efficiency of an antenna to direct energy in a specific direction. The formula for calculating antenna gain is G = 10 log (P2/P1). Antenna gain is pivotal in different types of antennas like dipole, Yagi-Uda, parabolic, and patch antennas.
This article explains antenna gain and dispels some of the misconceptions surrounding this valuable metric. It also discusses the gain typical of common antenna types and provides tools to calculate vital parameters relevant to antenna gain.
10 de feb. de 2015 · What is it? Gain is a key parameter for antennas that is a product of radiation directivity and electrical efficiency. To better understand antenna gain, antenna designers utilize two dimensional, and three dimensional patterns to aid in proper antenna selection. These patterns provide system engineers a visual of how a specific antenna radiates.
Antenna gain G(θ,φ) is defined as the ratio of the intensity P(θ,φ,r) to the intensity [Wm-2] that would result if the same total power available at the antenna terminals, P A [W], were radiated isotropically over 4π steradians.
Diagram illustrating how isotropic gain is defined. The axes represent power density in watts per square meter. is the radiation pattern of a directive antenna, which radiates a maximum power density of watts per square meter at some given distance from the antenna.
Learn how to calculate and compare the efficiency and gain of different antennas. See examples, definitions, and equations for antenna parameters and performance.
