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The expressions of power and coupling impedance of the ring-loop structure are derived.
作为其特例，本文还研究了环杆线与环结构的耦合阻抗。
The variation of coupling impedance of such antenna with its sizes has been investigated.
给出了该体制天线的耦合阻抗随天线尺寸的变化关系。
From those, we also obtain the distributing of field, dispersive function, and coupling impedance of rectangle grating structure.
并由此推出矩形栅的场分布，色散方程和耦合阻抗。
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