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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.
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.
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:
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.
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..
Learn what antenna gain is, how it is measured and how it relates to directivity, efficiency and radiation pattern. Find chapters and articles from various books and journals on antenna gain and related topics.
Learn how to calculate and compare the efficiency and gain of different antennas. Efficiency is the ratio of radiated power to input power, while gain is the ratio of power in the direction of peak radiation to an isotropic source.
