电波暗室场地驻波比测试方法及测试系统构建

介绍当前电磁兼容测试场地的种类及常见的评估测试,详细说明了一种新的电磁兼容电波暗室评估方法-场地驻波比测试法.并概述了在软硬件上如何构建一个场地驻波比测试系统.     

电磁兼容测试用暗室的性能设计

作为电磁兼容测试场地,半电波暗室越来越显示出其重要性.介绍了半电波暗室的基本设计方法,并举例介绍了射线法技术,给出了10m法半电波暗室的设计结果.     

用于电磁兼容测量的电磁屏蔽半电波暗室

叙述了ＥＭＣ暗室与微波电波暗室的区别，讨论了暗室设计中需考虑的问题，最后叙述了暗室的检验方法，包括归一化地衰减和测试面场均匀性。     

电磁兼容测量场地从OATS、SAR到FAR的演变

试验场地对电磁兼容测试至关重要.本文对常用的几种实验场地:开阔试验场OATS、半电波暗室SAR、全电波暗室FAR存在的问题,尤其是限值的转换问题作了较为详细精确的分析,对实际的测试工作具有参考价值.     

多功能电波暗室应用技术

该文介绍了电磁兼容测试需要的多功能电波暗室,成为多功能电波暗室应具备的基本功能,对满足标准要求的多功能电波暗室所需具备的性能指标进行描述及相应的测试要求,如基本的NSA,Svswr,FU。对在多功能电波暗室中进行不同项目测试时所对应的场地布置进行了分析,最后对多功能电波暗室的优劣进行了总结。     

全电波暗室30MHz～1GHz场地确认方法

该文介绍了全电波暗室30MHz～1GHz场地确认的方法,并对本单位5m全电波暗室的实际测试结果进行了分析总结。     

半电波暗室不同测试距离辐射场强的换算模型

分析了使用半电波暗室测量不同距离处辐射场强之间的换算关系。首先介绍基于对数距离路径损耗得到的经验模型,然后通过计算不同发射/接收天线间距的归一化场地衰减（NSA）差值,得到了对同一场地和不同场地的不同测试距离处辐射场强理论模型。对不同场地的工程模型进行讨论,并且使用实验数据分析了不同测试距离处辐射场强的换算关系。实验结果表明,不适宜引入确定性修正因子,对待测物在3 m和10 m法半电波暗室的测试结果进行转换。     

2007国际电磁兼容学术研讨会论文集·摘要(三)

比吸收率(SAR)的建模与测量用部分球形替代品对比吸收率(SAR)评估的研究用头部的部分模型可以有效地减少比吸收率(SAR)的计算量,从而减少复杂的运算和时间的消耗。     

电波暗室场地电压驻波比实测

CISPR16-1-4：2007 Ed2．0规定了1GHz以上采用场地电压驻波比法验证辐射骚扰测试场地的方法,北京无线电计量测试研究所已经依据该方法对某电波暗室进行了实际测试,指出了测试系统搭建过程中需要注意的问题,分析了测试数据。     

红外地球敏感器整机EMC试验测试设备

在不同的型号任务中,对摆动扫描式红外地球敏感器在电磁干扰的环境中所达到的抗干扰能力需要进行考核。详细介绍了便携式摆动扫描式红外地球敏感器整机EMC 试验专用性能测试设备的总体结构及主要部分结构设计,该设备能考核地球敏感器的整机性能指标,给出红外辐射信号,全面考核产品的光、机、电性能。所设计的地球模拟器针对卫星35 786 km 和21 500 km 两个轨道高度,采用可更换地球光阑的方案,提供17.46和26.54两种地球张角,所研究的测试设备实现了在地面上模拟卫星在太空中所看到的地球,供星上红外地敏在地面上测试性能使用。     

The problem of size [EMC testing]

Some systems, such as telephone exchanges, are simply too large or too complex to undergo EMC testing in the normal way. Three main problems exist with the EMC Directive for large systems. First, the size of the open area test sites recommended in existing standards is often too small for large systems. Secondly, there is a requirement to vary the position of the cables attached to the equipment under test (EUT) to maximise emissions. Finally, standards require the rotation of the equipment under test to maximise the emissions measured. This would prove difficult in the case of a physically large system and its associated cabling. The limitations of existing standards has been recognised by the European telecoms industry, and a new standard covering the measurement of emissions from large telecoms systems has been published. This standard is ETS 300 127 (1994), published by the European Telecommunications Standards Institute (ETSI), and it may be used to demonstrate compliance to the EMC Directive     

电磁兼容及其测试技术的分析

本文是以电磁兼容为切入点,阐述了电磁兼容的含义与设计原则,然后又分析了其测试技术.会以其为论点展开讨论的原因是,现在空间中认为电磁不断增加,加速电磁环境的恶化,并且这这一问题也受到人们的广泛关注,从而研发出电磁抗干扰技术.     

某军用设备电磁兼容检测与整改

电磁作为电气理念重要组成部分之一,伴随着电磁设备生产的不断更新与升级,也逐渐渗透到了各个领域的生活与生产当中,同时也带来了很大的促进性作用.但是在电磁设备应用的过程中,一些问题也不断的暴露出来,比如说电磁的兼容性问题,这样不仅会影响的电磁本身性能的发挥,更会对企业高效率的生产带来很大的阻碍,为此,本文特以某设备在电磁兼容测试中所出现的问题进行了有针对性的解决,并给予了相应的优化性建议.     

Cutting costs of compliance [EMC testing]

Simple and inexpensive in-house test procedures and instrumentation can save a great deal of time and cost in EMC certification. The author discusses the role of precompliance testing and practical approaches, including instrumentation, to this form of testing     

高性能PCB信号完整性及电磁兼容仿真设计

随着电子设备工作速度的不断提高，连接设备、电路板、集成电路和器件的互连系统设计越来越成为制约整个系统设计成功的关键，以高速高密度PCB设计为例，其信号完整性（SI）问题、电源完整性（PI）问题以及电磁兼容（EMC／EMI）问题已经成为设计工程当中必须解决的核心问题。随着技术的发展，越来越多的设计人员认同“高速设计就是高频设计”这一全新理念，图1很好地诠释了这一特点。     

机场选址和开航电磁环境测试探讨

提出了机场电磁环境测试的选址电测和开航电测两种形式．整理了机场多种无线电业务的技术要求．探讨了机场电测的地点、时间、设备配置、软件功能要求、测试过程、数据处理等问题。     

WCDMA试验现场电磁环境测试初探

为了促进我国3G公众移动通信的发展,信息产业部规定:从事3G移动通信系统的研发、生产企业,需要在研发地点进行实效发射试验,须将频率申请及试验方案报所在的省、自治区、直辖市无线电管理机构,经相关无线电管理机构进行电磁环境测试并且提出初审意见后,转报信息产业部无线电管理局审批。2002年广东省无线电监测站先后对深圳华为、LG.拓普仕、广东北电、深圳中兴、东莞诺基亚等五家公司的试验网进行现场电磁环境测试。本文对有关问题进行初步的探讨。WCDMA试验网预定工作参数及典型方案1.占用的频段:上行:1920MHz-1980MHz(其中任选1个5…     

The Challenge of Industrial EMC

The established methods of military/communicationsoriented electromagnetic compatibility are often not applicable to modern industrial computer/microprocessor-dominated control systems. The reason is: operating conditions for communications and for control systems are in some respects distinctly different; so much so that a different approach, here denoted electromagnetic "compossibiity," is very much needed for control systems. It includes the consequential mandatory safety measures (National Electrical Code (NEC),etc.). Generically, it requires a systemic planning based on partition, isolation, and redundancy (instead of frequency management). Specifically, it has to eliminate widespread, but misleading, oversimplifications still to be found in the speciously simple matters of grounding, filtering, and shielding.     

The Future of EMC Instrumentation

The paper reviews the broad field of EMC Instrumentation as it has evolved today, and attempts to outline the equipment which will be required to meet the fast growing needs of present and future systems. The functional requirements are reviewed, and key performance characteristics outlined in terms of measurement instrument parameters. In some cases, the performance characteristics require very significant improvement. This would be considered normal were it not for the simultaneous great increase required in degree of automation and operating speed, or data rate. The resulting dichotomy is unusually sharp and requires careful planning. Traditionally, EMC phenomena have been approached on a frequency domain basis, including transient effects. This was valid since almost all systems operated on a frequency domain basis, and will be valid for most systems for a considerable time to come. Increasing use of digital communications and control systems has shown the frequency domain approach to be inadequate for the treatment of such systems. It appears that a more efficient direct time domain approach will be required for an increasing number of systems. This will call for establishment of new standards, specifications, measurement equipment, and techniques.