英语翻译The directivity of an antenna has been defined as “the r

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英语翻译
The directivity of an antenna has been defined as “the ratio of the radiation intensity in a given direction from the antenna to the radiation intensity averaged over all directions”.In other words,the directivity of a nonisotropic source is equal to the ratio of its radiation intensity in a given direction,over that of an isotropic source.

天线的方向性被定义为“辐射强度在特定方向从天线的辐射强度比对所有方向平均”.换言之,一个各向异性源指向等于在给定方向的辐射强度的比率超过各项同性源.

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