把平面结和外匹配网络结合在一起进行频率特性分析；

The frequency behaviors of the planar resonator matched with transformers are analyzed.

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模拟分析表明 ，采用该结构 ，器件的雪崩击穿电压能提高到理想平行平面结的 90 %以上 ，器件的大电流特性和频率特性也有所改进 。

The simulation analysis indicates that with this structure the avalanche breakdown voltage of RF power transistors can be increased to be over 90% of that for an ideal parallel .

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利用平面波展开方法与超原胞方法研究了两种不同晶格的光子晶体异质结的界面态。

We have investigated the guide modes in two kinds of two_dimensional photonic crystal heterostructures by using the plane wave expansion method combined with the supercell technique.

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