一种宽带电磁辐照实验装置的研究

发布时间：2018-04-03 11:00

本文选题：电磁辐照实验装置　切入点：有限时域差分法　出处：《大连海事大学》2017年硕士论文

【摘要】：随着经济的突飞猛进和信息时代的来临,移动通信和各式的电器设备更加普遍的运用于人们的生活以及周边环境,它为人们带来了丰富的科技财富以及前所未见的新科学,与此同时,更将使人类生活暴露于一个电磁辐照的环境之中。而目前对于电磁辐照实验装置主要还集中在低频段的研究,如工频和移动通信频段,频带范围较宽的电磁辐照实验装置的研究却很少见到。随着可用频率范围的加宽,之前研究的DC-3GHz频带已经不能满足实验的要求,而且其辐射装置体积庞大,自动化性能低,这对于实验研究是非常不利的。本文对DC-6GHz宽带电磁辐照实验装置进行了理论和算法分析、建模仿真以及实际加工。宽带电磁辐照实验装置工作于DC-6GHz频带范围,要求其在频带范围内剩余反射较少,传输性能较好,即在DC-6GHz内回波损耗要小于-10dB。考虑到加工因素,对辐照实验装置进行了修改优化,将仿真与实际加工结合。宽带电磁辐照实验装置采用同轴不连续性和阻抗匹配作为理论支撑,并用有限时域差分法(FDTD)对同轴结构及不连续性进行了分析,利用过渡结构以及凹槽处理对产生不连续性的地方进行补偿,利用CST仿真软件进行建模、仿真设计,选取相匹配的射频连接器,最终设计了一种基于锥形结构的同轴宽带电磁辐照实验装置。优化结果与实际测试分析有较好的一致性,在DC-6GHz宽带范围内回波损耗均小于-10dB。
[Abstract]:With the rapid development of the economy and the advent of the information age, mobile communications and all kinds of electrical appliances are more widely used in people's lives and the surrounding environment. It has brought people a wealth of scientific and technological wealth and unprecedented new science.At the same time, the human life will be exposed to an electromagnetic radiation environment.At present, the research of electromagnetic irradiation experimental device is mainly focused on low frequency band, such as power frequency and mobile communication frequency band, and the research of electromagnetic radiation experiment device with wide frequency band is seldom seen.With the broadening of the available frequency range, the DC-3GHz frequency band studied previously can not meet the experimental requirements, and its radiator is large and its automation performance is low, which is very disadvantageous to the experimental research.In this paper, the theory and algorithm analysis, modeling and simulation of DC-6GHz wideband electromagnetic irradiation experimental device are carried out.The wideband electromagnetic radiation experimental device works in the DC-6GHz frequency band, which requires less residual reflection and better transmission performance in the frequency band, that is, the echo loss in DC-6GHz is less than -10 dB.Considering the processing factors, the irradiation experimental device was modified and optimized, and the simulation was combined with the actual processing.The coaxial discontinuity and impedance matching are used as theoretical support in wideband electromagnetic irradiation experimental device. The coaxial structure and discontinuity are analyzed by FDTD method.The transition structure and grooves are used to compensate for the discontinuity, and the CST simulation software is used to model, design and select the matching RF connector.Finally, a coaxial wideband electromagnetic irradiation experimental device based on conical structure is designed.The optimized results are in good agreement with the actual test results, and the echo loss is less than -10 dB in the DC-6GHz wideband range.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O441

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