Finite-Difference Time-Domain Simulation on Transmission of Millimeter Waves through Miter Bends
Finite-Difference Time-Domain Simulation on Transmission of Millimeter Waves through Miter Bends
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DOI：
10.7567/jjap.52.11nd02
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发表时间：
2013-11
影响因子：
1.5
通讯作者：
Naoya Kashima;Hiroaki Nakamura;A. Takayama;Y. Tamura;S. Kubo
中科院分区：
文献类型：
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作者：
Naoya Kashima;Hiroaki Nakamura;A. Takayama;Y. Tamura;S. Kubo
我们通过时域有限差分 (FDTD) 仿真模拟了电磁 (EM) 波在由斜接弯曲组成的系统中的分布。为了研究斜接弯曲对模式转换的影响，模拟了三种形状的斜接弯曲。对于内部加工有凹槽的斜接弯头，输出电磁波的轮廓与输入波（HE11 模式）的轮廓略有变化。因此，这种情况在我们的模拟中展现了最佳的斜接弯曲形状。在内部没有加工凹槽的斜接弯头中，输出电磁波的变化比有凹槽的斜接弯头的情况更大，因为模式转换发生在没有凹槽的斜接弯头的表面。在逐渐改变电磁波方向的简单弯曲中，输出电磁波的轮廓发生变形，并且输入轮廓不守恒。比较以上三种情况，我们发现凹槽可以更有效地保存电磁波的轮廓。
We have simulated the distribution of electromagnetic (EM) waves through a system composed of miter bends by finite-difference time-domain (FDTD) simulation. To study the effect of mode conversion by miter bends, three shapes of miter bends have been simulated. For the miter bend that has processed grooves inside, the profile of the output EM waves is changed slightly from that of the input wave (HE11 mode). As a result, this case exhibits the best shape of the miter bend in our simulation. In the miter bend without processed grooves inside, the output EM waves change more than in the case of the miter bend with grooves, because mode conversion occurs at the surface in miter bends without grooves. In the simple bend, which changes the direction of EM waves gradually, the profile of the output EM waves is deformed and the input profile is not conserved. Comparing the above three cases, we found that the grooves lead to more efficient to conservation of the profile of EM waves.