本文選題：電磁輻照實驗裝置　切入點：有限時域差分法　出處：《大連海事大學(xué)》2017年碩士論文

【摘要】：隨著經(jīng)濟的突飛猛進和信息時代的來臨,移動通信和各式的電器設(shè)備更加普遍的運用于人們的生活以及周邊環(huán)境,它為人們帶來了豐富的科技財富以及前所未見的新科學(xué),與此同時,更將使人類生活暴露于一個電磁輻照的環(huán)境之中。而目前對于電磁輻照實驗裝置主要還集中在低頻段的研究,如工頻和移動通信頻段,頻帶范圍較寬的電磁輻照實驗裝置的研究卻很少見到。隨著可用頻率范圍的加寬,之前研究的DC-3GHz頻帶已經(jīng)不能滿足實驗的要求,而且其輻射裝置體積龐大,自動化性能低,這對于實驗研究是非常不利的。本文對DC-6GHz寬帶電磁輻照實驗裝置進行了理論和算法分析、建模仿真以及實際加工。寬帶電磁輻照實驗裝置工作于DC-6GHz頻帶范圍,要求其在頻帶范圍內(nèi)剩余反射較少,傳輸性能較好,即在DC-6GHz內(nèi)回波損耗要小于-10dB�？紤]到加工因素,對輻照實驗裝置進行了修改優(yōu)化,將仿真與實際加工結(jié)合。寬帶電磁輻照實驗裝置采用同軸不連續(xù)性和阻抗匹配作為理論支撐,并用有限時域差分法(FDTD)對同軸結(jié)構(gòu)及不連續(xù)性進行了分析,利用過渡結(jié)構(gòu)以及凹槽處理對產(chǎn)生不連續(xù)性的地方進行補償,利用CST仿真軟件進行建模、仿真設(shè)計,選取相匹配的射頻連接器,最終設(shè)計了一種基于錐形結(jié)構(gòu)的同軸寬帶電磁輻照實驗裝置。優(yōu)化結(jié)果與實際測試分析有較好的一致性,在DC-6GHz寬帶范圍內(nèi)回波損耗均小于-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.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O441

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