它是指天线辐射出去的功率（即有效地转换电磁波部分的功率）和输入到天线的有功功率之比。是恒小于1的数值。
小型天线最重要的参数是天线效率(Antenna Efficiency)。这个参数表明有多少发射功率实际辐射到空间，或者说功放输出的功率有多少能到达接收机。
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... aerial dust filter 空气滤尘器；空气过滤器 aerial effect 天线效应 aerial efficiency 天线效率 ...
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... Radiation efficiency 天线效率 Antenna impedance 天线阻抗 Diversity gain 分集增益 ...
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天线辐射效率 Antenna radiation efficiency ; [电讯] radiation efficiency of antenna
天线孔径效率 antenna aperture efficiency ; aperture efficiency antenna
孔径天线之孔径效率 aperture efficiency of aperture antenna ; aperture antennas aperture efficiency of
高效率天线 [电讯] high effective antenna
天线辐射效率量测 antenna measurement radiation efficiency
天线幅射效率量测 antenna radiation efficiency measurement
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本文讨论场相关定理用于计算反射面天线效率的两种不同公式。
This paper describes two different formulae of the field correlation theorem for the calculation of the efficiency of reflector antennas.
因此本论文利用回声实验室做天线效率评估，开发出两版回声实验室。
Therefore, this thesis attempts to develop reverberation chambers to evaluate antenna's efficiency.
同抛物面反射器相比，菲涅尔区相位修正平面反射器的相位效率因子对天线效率的影响显著。
Compared with the parabolic reflector, a phase factor is of most importance in the efficiency evaluation of Fresnel zone phase-corrected plate (FZP) ones.
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