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研究Ｎ×Ｎ星形平板介质波导耦合器的分析模型与设计问题，运用菲涅耳衍射理论，给出传输效率的一般表达式，引入拉格朗日乘法算子，给出了实现最大传输所要求的端口最佳激励函数．
The analytical model and design of N × N star slab dielectric waveguide coupler are studied. Fresnel diffraction theory is used to give the general expression of transmission efficiency. The Lagrange multiplication operator is introduced to obtain the maximum transmission The required port best incentive function.