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In a receiving antenna, the gain describes how well the antenna converts radio waves arriving from a specified direction into electrical power. When no direction is specified, gain is understood to refer to the peak value of the gain, the gain in the direction of the antenna's main lobe.
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.
Learn how to measure and compare antenna gain in dBi and dB, the logarithmic terms that quantify the directional feature of antennas. Find out the difference between isotropic and directional antennas, and how to use a mirror to simulate gain. See examples of gain in dBi and dB for various antennas.
La ganancia de la antena indica qué tan fuerte es la señal que una antena puede enviar o recibir en una dirección específica. La ganancia se calcula comparando la potencia medida transmitida o recibida por la antena en una dirección específica con la potencia transmitida o recibida por una antena ideal hipotética en la misma situación..
La ganancia es un producto de la directividad y la eficiencia de una antena. La eficiencia es siempre menor o igual a uno, por lo que la ganancia es menor que la directividad, y un parámetro más útil para las antenas reales.
5 de mar. de 2022 · 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. G(θ,φ) is often called “gain over isotropic” where:
Learn what antenna gain is and how it is measured in different contexts, such as radar, electromagnetics and telecommunications. Compare antenna gain with directivity, radiation efficiency and effective radiated power, and see how they are calculated and applied.
