發(fā)布時間：2019-06-07 13:21

【摘要】：低頻段電磁輻射發(fā)射測試是電磁兼容性分析的重要組成部分,由于在低頻段電磁波的波長與設(shè)備線纜的長度可比擬,電磁輻射發(fā)射主要通過設(shè)備供電線纜和設(shè)備之間互聯(lián)線纜輻射出去。同時工作在低頻段的各類設(shè)備非常多,設(shè)備之間的電磁干擾問題十分嚴(yán)重,故對工作在低頻段的設(shè)備進(jìn)行電磁輻射發(fā)射測試分析顯得十分重要。然而在測試中接收天線與待測設(shè)備、接收機(jī)之間存在相互耦合的現(xiàn)象,最終會影響接收天線端口的電壓,導(dǎo)致測試結(jié)果產(chǎn)生較大的誤差,直接影響到對待測設(shè)備電磁兼容性的精確判斷。本文圍繞低頻段輻射發(fā)射的測試方法展開研究,選取電磁兼容測試中典型的線板結(jié)構(gòu)對測試方法進(jìn)行分析,分別從全波電磁仿真和實驗測試兩個方面進(jìn)行闡述。本論文的主要研究內(nèi)容和總結(jié)如下:首先運(yùn)用有源拉桿天線對低頻段輻射發(fā)射的測試方法進(jìn)行研究,分別運(yùn)用電磁仿真和實驗測試的方法分析了新舊軍標(biāo)模式下拉桿天線的接地方式對電場輻射發(fā)射測試結(jié)果的影響。其次對影響低頻段電場輻射發(fā)射測試精確度的因素進(jìn)行了討論,對于電磁兼容軍用測試標(biāo)準(zhǔn)的修改有推進(jìn)作用。最后,本文介紹了針對低頻段輻射發(fā)射場的預(yù)估計方法,轉(zhuǎn)移函數(shù)法以及優(yōu)化方法—一多段轉(zhuǎn)移函數(shù)法,優(yōu)化算法能夠有效地降低產(chǎn)品研發(fā)階段的費(fèi)用。此外,本文基于標(biāo)準(zhǔn)的雙錐天線對電場輻射發(fā)射的測試方法進(jìn)行研究,采用全波電磁仿真和實際測試相結(jié)合的方法分析低頻輻射發(fā)射測試中線纜距離金屬板的高度和線纜長度等對低頻段電場輻射發(fā)射的影響,有助于電磁兼容工程師更好的理解電子設(shè)備電磁輻射水平,進(jìn)而更好的進(jìn)行電磁兼容設(shè)計。
[Abstract]:The measurement of electromagnetic radiation emission in low frequency band is an important part of electromagnetic compatibility analysis, because the wavelength of electromagnetic wave in low frequency band is comparable to the length of equipment cable. Electromagnetic radiation emission is mainly radiated through the equipment power supply cable and the interconnection cable between the equipment. At the same time, there are many kinds of equipment working in the low frequency band, and the electromagnetic interference problem between the equipment is very serious, so it is very important to test and analyze the electromagnetic radiation emission of the equipment working in the low frequency band. However, in the test, there is a phenomenon of coupling between the receiving antenna and the equipment to be tested, which will eventually affect the voltage of the receiving antenna port, resulting in a large error in the test results. It directly affects the accurate judgment of electromagnetic compatibility of measuring equipment. In this paper, the testing method of low frequency band radiation emission is studied, and the typical wire board structure in electromagnetic compatibility test is selected to analyze the test method, and the full wave electromagnetic simulation and experimental test are described respectively. The main research contents and summary of this paper are as follows: firstly, the testing method of low frequency band radiation emission is studied by using active pull rod antenna. The influence of grounding mode of pull rod antenna in new and old military standard mode on the test results of electric field radiation is analyzed by means of electromagnetic simulation and experimental test respectively. Secondly, the factors that affect the accuracy of low frequency band electric field radiation emission test are discussed, which can promote the modification of electromagnetic compatibility military test standard. Finally, this paper introduces the prediction method, transfer function method and optimization method-one-stage transfer function method for low-frequency radiation emission field. The optimization algorithm can effectively reduce the cost of product development stage. In addition, based on the standard double cone antenna, the measurement method of electric field radiation emission is studied in this paper. The influence of the height of the middle line cable from the metal plate and the cable length on the low frequency band electric field radiation emission is analyzed by using the method of full wave electromagnetic simulation and practical test. It is helpful for electromagnetic compatibility engineers to better understand the electromagnetic radiation level of electronic equipment, and then to better design electromagnetic compatibility.
【學(xué)位授予單位】：南京信息工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN03;TN820

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本文編號：2494829