| ID |
原文 |
译文 |
| 13254 |
本文提出的WAPE模 型解决了传统的PE离轴传播角度偏小的问题，将电波的最大传播仰角提升至约50。 |
The Greene approximation WAPE model is proposed to resolve a limited propagation angle problem, which increased propagaton angle up to about 50。. |
| 13255 |
同时大大减小了计算区域中上边界吸收层的设置尺寸，从而提高了PE的计算效率。 |
This model greatly reduces the sizes of absorbing layer, which improve the computationa! efficiency of the PE method. |
| 13256 |
实验证明，当伪微分算子的相位误差不超过 0. 00!时，appert、Claerbout和Greene近似形式得到的最大传播角分别为20。、35。和45。 |
In this paper, it is found that for an arbitrary phase error limit of 0. 002, the Tappert, Claerbout and Greene approximations have acceptable propagaton angle limits of approximately 20。,35。and 45。respectively. |
| 13257 |
最后，通过与经典的光学双射线模型进行对比，证明本文提出的基于NLBC的Greene近似WAPE模型的可计算传播仰角更大，对上边界处反射电磁波有良好的吸收效果。 |
The PE results are compared with the classical optical dual-ray model. The results show that the Greene approximation PE model has greater radio propagation angle and higher prediction accuracy, and get good absorbing effect of electromagnetic wave on upper boundary condition reflection. |
| 13258 |
因此，本文的模型适用于对流层远距离复杂环境中电磁波传播特性的精确预测。 |
The Greene WAPE models can accurately predict radio propagaton characteristics in complcated atmospherc envronment. |
| 13259 |
基于基片集成波导(substrate mtegrated waveguide, SIW)结构设计了两款四阶的耦合带通滤波器，使用三维全波电磁场仿真软件HFSS对设计的两款滤波器进行了仿真设计和优化，由仿真结果分析得出，两款滤波器的工作频率均位于毫米波频段。 |
In this paper, two fourth—order coupled bandpass filters are designed based on the substrate wavegude (SIW) structure.Three-d Mull-wave electromagnetc Meld simulaton software high frequency structure simulator (HFSS) was used to simulate, design and optimze the two designed filters. According to the analysis of the simulation results, the two filters operate at miliimeteI- wave band. |
| 13260 |
第一款SIW滤波器实现了切比雪夫型响应，中心频率为 20 GHz，带宽为2 GHz，通带内的插入损耗低于1.5 dB，回波损耗低于ー20 dB，在阻带中对信号的衰减程度可以达到50 dB。 |
The first one realzes the Chebyshev type response with a center frequency of 20 GHz, a band一 width of 2GHz, insertion loss within passband less than 1.5dB, return loss less than -20dB and the attenuaton of the signal in the stopband can reach 50dB. |
| 13261 |
第二款SIW滤波器实现了准椭圆函数型的响应，中心频率为29.1 GHz，带宽为300 MHz，通带内的插入损耗低于1 dB，回波损耗低于ー20 dB,在通带到阻带的过渡中实现了两个陷波点。 |
The other one realzes the quasi-ellptc functonal response wth a center frequency of 29.1 GHz, a bandwdth of 300 MHz, inserton loss wthn passband less than 1dB, return loss less than -20dB and two notches are implemented in the transtion of passband to stopband. |
| 13262 |
仿真结果表明，在毫米波滤波器设计中引入SIW结构，有利于优化滤波器尺寸，得到较好的滤波器性能指标，是毫米波滤波器发展的ー个重要方向。 |
The simulaton results showthat the introducton of substrate integrated wavegude structure in the millimeter wave filter design is conducve to optimize the flter sze and obtain better filter performance, which is an important directon in the development of millimeter wave filter. |
| 13263 |
频率选择表面(frequency selectPe surface!FSS)的研究中，小型化设计一直是研究的热点内容之一，小型化单元结构可以很好地增加FSS的稳定性。 |
In the research of frequency selective surface(FSS) , mi ni atur i zat i on design has always been one of the hot topcs of research, and the mnaturzed unt structure can greatly mprove the stablty of FSS. |