舰船通信系统电磁兼容性设计技术

舰载电子系统电磁兼容性(EMC)设计对于舰船作战效能发挥至关重要.在系统论述舰船通信系统的EMC软件和硬件设计技术基础上,分析了美军多功能电磁辐射系统(MERS)的天线共用、天线布局优化、自适应干扰对消、光电隔离等电磁兼容措施.这些新方法、新技术,对开展现代舰船通信系统电磁兼容性设计具有参考价值.     

ISO 26262对汽车电子产品EMC的影响

汽车上大量应用的电气、电子和可编程电子器件,在实现产品多功能化和高性能化的同时,也带来了功能安全问题。EMC作为汽车电子产品的一个重要指标,在功能安全领域也逐渐地引起人们的重视。ISO 26262标准对EMC提出了更高和更新的要求。介绍了ISO 26262标准及其要求,重点分析其对汽车电子产品EMC带来的影响。     

航空通信系统试飞过程中的电磁兼容性评估

电磁兼容性(EMC)是航空电子产品的主要性能,也是实现系统功能的重要保证。试飞试验是按照预想实现一种思想而提供最终证据的在机载真实环境条件下进行飞行试验,并通过试飞数据分析结果评估系统效能,所以,EMC预测是航空电子系统试飞评估主要内容之一。论述了基于电磁拓扑(Electromagnetic Topology)理论分析的航空通信系统EMC评估方法,该方法已在航空通信系统试飞中被采用。     

EMC awareness for multi chip modules

As more and more complex functions are realized in modern IC designs, there is also an increasing need to design the IC in order to satisfy the Electromagnetic Compatibility (EMC) requirements. Without a proper design, the high operating frequencies of modern integrated circuits often result in high emissions. Due to the cost pressure on mobile phones and other portable devices, shielding on the PCB is avoided and as a result, the electromagnetic emission of integrated circuits must be reduced. This article provides an overview of design methodologies for achieving EMC of devices implemented in systems in package (SiP) technologies. It exhibits the importance to imply EMC issues in the early design phase to reduce electromagnetic emissions.     

星载电子设备试验的电磁干扰三要素分析

从某星载电子设备要进行的试验着手,研究了星载电子设备电磁干扰的三要素(干扰源、耦合途径及敏感部位),对电磁兼容试验的主要内容和要求进行了简介,并详细分析了三要素与电磁兼容试验项目之间的关联性。对某星载电子设备电磁兼容设计报告的基础上提炼并总结的结论,对星载电子设备的电磁兼容设计有较高的参考价值,对其他电子设备的电磁兼容设计也有一定的参考意义。     

电磁兼容制造涵义探讨

电气电子产品的电磁兼容性问题很突出,电磁兼容制造也越来越受到重视。然而,电磁兼容制造是一个新的概念,迄今为止,无明确的定义。为此,探讨了电磁兼容制造的涵义、内容、设计与制造的关系、相关制造技术等方面的内容,明晰了电磁兼容制造的内涵及其相关的制造技术,旨在于促进电磁兼容制造技术的发展。     

航空机载电源系统电磁兼容性及设计应用

电子产品的电磁兼容性正日益成为研发人员关注的设计的指标,电子系统或设备的研发阶段应用电磁兼容性设计技术可有效提升产品的安全性和可靠性。航空机载电源系统因其特殊的应用领域更加强调系统的电磁兼容性。该文通过研究机载电源系统的电磁兼容性设计,简要归纳了电磁兼容性设计的主要应用方法和注意事项,并以实例说明电磁兼容性设计对机载电源系统的影响。     

结合电磁带隙结构和磁性材料的PCB电源接地层设计

在印制电路板的设计中,供电系阻抗谐振所引起的噪声和电磁干扰问题一直是设计人员关注的焦点。已有的研究显示,适当的电磁带隙（EBG）结构可以有效地降低供电系的电磁干扰。本文通过运用基于快速算法和分解元法的计算机仿真,研究供电系EBG结构中采用磁性材料后的阻抗特性。研究表明,在供电系内侧增加磁性材料涂层,能在原有基础上进一步抑制电磁干扰。     

论军用装备研制中的电磁兼容性控制

电磁兼容性作为武器装备的一种性能,受到越来越多的重视。该文就军用装备电磁兼容性控制的三个主要方面:电磁兼容性管理、电磁兼容性设计和电磁兼容性试验展开讨论,并结合产品科研生产的全寿命周期内的电磁兼容性活动,详细分析了各部分的功能,涉及的主要内容,以及相应的操作方法等。     

发射机的电磁兼容性设计

EMI（电磁干扰）问题的深入研究对提高所设计产品的可靠性有着较大的现实意义。文中阐述了EMC（电磁兼容性）在电路设计中的重要性和电子设备的EMC问题。就雷达发射机的EMC设计问题,根据发射机干扰信号的传播途径和耦合方式,针对经常出现的各种EMI问题,提出了接地、屏蔽、滤波、瞬态抑制等4种抑制EMI的方法。介绍了其他一些常用的提高设备EMC的方法,分别从PCB（印制电路板）设计、设备内的布线、软件抗干扰设计等方面进行了探讨。     

仪器仪表产品功能安全评估测试技术研究与分析

文中分析工业控制领域中仪器仪表特点和功能安全标准,并横向比较研究安全相关领域,包括核电、铁路、汽车等对于功能安全评估的要求。研究进行评估过程中采用的测试技术,包括EMC试验方法和软件验证和确认方法。功能安全产品的试验不同于普通产品型式试验要求,因此部分EMC试验指标与基础试验标准的试验指标相比,主要在试验时间、范围以及次数上针对功能安全提出要求。同时,在软件验证和确认过程,针对功能安全产品进行软件验证和确认过程,包括文档评审、编码规则检查、单元测试和集成测试。最后就已完成项目,对功能安全评估测试技术进行小结,提出今后研究主要内容。     

Electromagnetic Interference Control Within Aerospace Ground Equipment for the Mcdonnell Phantom II Aircraft

This paper describes the program conducted by McDonnell Aircraft Corporation to assure Electromagnetic Compatibility (EMC) within Aerospace Ground Equipment (AGE) for tile Phantom II Aircraft. The wide variety of sophisticated AGE utilized presents many unique EMC problems. AGE/Aircraft compatibility considerations at McDonnell are of prime concern. Consistent grounding philosophies within AGE and compatible with airborne equipment has been established. Grounding systems are classified as primary power, secondary AC power, DC power, signal and radio frequency. Each equipment ground is classified and controlled accordingly. A Weapon System concept that results in the extensive use of shielded cabling is an important part of the McDonnell Aircraft EMI control approach. Design and testing of shielded cables, connectors, and connector back-shells has been accomplished. New designs to reduce radiation from various front panel mounted switches, jacks, meters, and lights have been developed. These include the grounding of "Bat" handles and shafts of switches and using waveguide below cut-off devices for jacks. Testing complex AGE to determine compliance with Military Specifications can become very time consuming. Methods and procedures to reduce test time, yet maintain a valid test, have been formulated.     

Electromagnetic energy propagation in power electronic converters:toward future electromagnetic integration

Historically, it came about that the analysis and design of the power electronic converter center around currents and voltages in the circuits. During the last decade, the electromagnetic character of power electronic converters became more important due to the noise that the switches generate, and electromagnetic interference (EMI) and electromagnetic compatibility (EMC) standards have been put in place to control the electromagnetic noise levels. In this contribution, it is argued that coming to grips with the electromagnetic operation of switch-mode power conversion presents a barrier of knowledge that will have to be crossed in order to achieve future meaningful innovation in switch-mode power conversion. Rigorous electromagnetic analysis using realistic parameters are used to indicate important issues relating fundamental limits and technological paths for future generations of power electronic converters. Electromagnetic integration in three dimensions creates new possibilities to increase power densities     

软件技术在电磁兼容设计中的应用

电磁兼容设计是一项系统的工程,对于保障产品的可靠性有着重要的作用。随着越来越多的软件技术被应用到设计中,电磁兼容设计的成本将得到显著的降低,设计的灵活性也将得到很大的提高。介绍软件技术在系统电磁兼容设计领域中的应用及常用的软件抗干扰设计技术。     

高功率因素反激式开关电源的电磁兼容研究

摘要：论文对带有高PF（功率因素）反激式的开关电源的电磁干扰进行了分析。为实现开关电源的EMC（电磁兼容）,在设计过程中采用了EMI滤波器。论文在探讨EMI滤波器的设计原则基础上,分析了高频分布参数对滤波器频率特性的影响,通过设计和调整滤波器的结构及器件参数,实现了EMI传导干扰的有效抑制,使带有高PF反激式的开关电源达到灯具的EMI标准。     

电磁照射与人体健康

目前公众越来越关注电磁照射对自身健康的影响,特别是电磁照射致癌以及通信基站安全问题.本文将根据今年来国际组织(WHO、ICNIRP等)对于相关课题的研究,介绍相关的研究结果.     

吸波材料研究现状以及多层吸波材料反射损失计算

随着科学技术的不断进步,电气电子设备已经普及到社会的各个角落,电磁干扰(EMI)问题越来越突出,电子设备的电磁兼容已经被广泛关注。电磁屏蔽作为抑制电磁干扰的一个重要手段,在绝大多数的电子设备中得以应用。吸波材料对电磁波有吸收作用,可以用来克服反射式屏蔽的不足。本文首先介绍了吸波材料的吸波机理,对当今研究的纳米吸波材料进行了描述,最后给出了多层吸波材料反射损失的计算方法。     

Early bird catches silver lining [EMC compliance]

The author outlines the response of Seaward Electronic Ltd. to the European Directive on Electromagnetic Compatibility. The company looked at and rejected the test house option, internal test equipment and technical construction files. Instead Seaward Electronic started to address the knowledge and expertise problem. After consulting the country's leading EMC experts the company commissioned a successful feasibility study from York University's Electronics Centre, who were eventually briefed to develop the expert system into a commercial product. The resulting system, the Seaward Expert Consultant, offers knowledge and information to companies looking to establish a clear route to EMC compliance. Expert Consultant contains details of all the standards, the relevant test methods, the test procedures and levels of performance. It allows users to enter product details and, by answering yes/no questions, to identify appropriate standards and necessary tests. The Expert Consultant can produce all the necessary documentation to carry out testing and, where appropriate, produce pro forma construction files, which can be completed, stored in the equipment and printed out. It also has a diagnostic capability in the event of problems     

EMC and the automotive industry

Modern motor cars and trucks depend increasingly on sophisticated electronic control systems to make life more comfortable for the driver and to enhance vehicle safety. It is important that these systems neither radiate excessive electromagnetic noise, which could cause interference with on-board or domestic radio reception, nor be susceptible to the electromagnetic fields that the vehicle will encounter on the road, since the latter could compromise vehicle safety. The article reviews the way in which EMC has been tackled by the automotive industry for the last 40 years and concludes that the automotive industry is well placed to comply with European Community EMC legislation     

EMEC-an EM simulator based on topology

For the control of electromagnetic interference a topological approach is strongly recommended. It allows for a complex system to be structured into a feasible number of zones, each having certain levels of energy density, transient amplitudes, background noise, etc. Electromagnetic compatibility (EMC) is reached by making sure that all system elements comply with those levels. In this paper, a simulation program is described that facilitates the EMC specification. The user interface forces the user to adapt to the topological approach. Sources, zone properties, cables, and other coupling path etc., are specified and disturbances in arbitrary locations are computed. By comparing computed results for varying system properties with known emission and immunity properties of system elements, different ways to reach EMC can be evaluated. Including actual external threats among the sources, EMC compliance means that the system is immune to intentional electromagnetic interference, high-power electromagnetics, electromagnetic pulse, lightning, etc.