高斯分布圆口径天线菲涅尔区能量传输效率分析

摘要

The power transfer efficiency between two circular aperture antennas in the Fresnel region is analyzed, and the analytical expression of power transfer efficiency between two focused Gaussian illumination circular antennas is given in this paper. The power transfer efficiency is calculated according to differentσand C. The results show that the optimum il-luminations that maximize the power transfer efficiency can be approximated by Gaussian illuminations. There is a most suit-able illumination constant σ for each C that maximizes the efficiency. When the Fresnel number is small, the optimumσis approximately equal to C/3, and then it approaches to C/2 as C increases.%文章对菲涅尔区两圆口径天线间能量传输效率进行了分析,给出了聚焦条件下两高斯分布圆口径天线间能量传输效率的解析表达式。并给出能量传输效率随不同高斯分布参数σ和菲涅尔数C变化的计算结果。结果表明：使圆口径天线间能量传输效率最大的最佳口径场分布可通过高斯分布来近似实现,且对于每一个菲涅尔数C都有一个最佳的σ使得两天线间能量传输效率最大,当菲涅尔数较小时,最佳σ≈C/3,随着菲涅尔数C增大,σ趋于C/2。