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本文采用电磁场理论的方法,求出了天线差增益系数的上限值,它等于1/4;而对具有全差方向图的天线,则其差增益系数的上限值为1/8。
In this paper, the upper limit of the gain difference coefficient of the antenna is obtained by the electromagnetic field theory, which is equal to 1/4. For the antenna with the all-deviation pattern, the upper limit of the difference gain coefficient is 1/8.