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1、3m法电波暗室辐射场抗扰度场地均匀性校准规程技术文件3m 法电波暗室辐射场抗扰度场地均匀性校准规程The method of uniform field strength calibration in 3mchamber第一版The 1st edition批准：日期审定：日期编制：日期2009.05.20QJ/63.740-20093m法电波暗室辐射场抗扰度场地均匀性校准规程1 适用范围和目的Scope and object:IEC61000-4-3 测试中的场地均匀性校准The calibration of field in IEC61000-4-32 引用文件Normative refer
2、encesIEC 61000-4-3：1998电磁兼容 试验和测量技术射频电磁场辐射抗扰度试验Testing and measurement techniques- Radiated, radio-frequency, electromagnetic field immunity test3 校准使用的仪器设备：Test equipment: 3m 法电波暗室Anechoic chamber 射频信号发生器 RF signal generators: 宽频功放 power amplifier 发射天线 field generating antennas 场强探头 field strength
3、monitoring antenna 场强仪 field strength monitor 功率仪 power meter3m法电波暗室辐射场抗扰度场地均匀性校准规程4校准过程:a）场强探头位置的确定Locate the field strength probe position确认IEC61000-4-3标准测试中所使用垂直均匀域平面，定出需要校准的16个点的位置;Locate the vertical uniform area and the 16 measuring point for calibration as following:4424144321SE-nior 呻III心北Fi
4、gurel4233323123221312XX 检测中心2009.5.20QJ/63.740-20093m法电波暗室辐射场抗扰度场地均匀性校准规程XX检测中心2009.5.20QJ/63.740-20093m法电波暗室辐射场抗扰度场地均匀性校准规程测试中，场强探头应放置在如图1所示的16个点上，其中场强探头的垂直投影应 分别落在图2所示的地面上的1、2、3、4点上，如图2;场强探头的高度应在图3所示 的1、2、3、4位置：During the test, the field strength probe should be put in the 16 poison as shown in fi
5、gure1,the vertical projection of the probe should located on position 1 to 4 on the ground as shown in figure 2, and the height of the probe should be at position 1 to 4 in figure 3.Figure23m法电波暗室辐射场抗扰度场地均匀性校准规程Figure 33m法电波暗室辐射场抗扰度场地均匀性校准规程b）吸波材料位置的确认Locate the absorber position在地面上铺设使用的吸波材料，记录吸波材料
6、的配设位置，markl至mark4分别为吸波 材料铺设的4个角；Put additional absorber on the ground, and record the position of the 4 angle of the absorber as in figure 4:Figure 4c）将天线放置在距离垂直均匀域平面3m远的位置处Put the antenna on the point 3m away from uniform field area and make sure the direction of the antenna perpendicular to the un
7、iform field area as in figure 5:Figure 5XX检测中心2009.5.20QJ/63.740-20093m法电波暗室辐射场抗扰度场地均匀性校准规程d）天线水平位置的定位Locate the horizontal position of the antenna分别记录天线水平极化的天线四角在暗室地面的上垂直投影点Hl、H2、H3、H4及天 线底座三脚所在位置1、2、3,同时记录天线四角距地面的高度hH如图所示；Record the horizontal position of the antenna as in figure 6, the vertical p
8、rojection of the 4 angel of the antenna are marked as H1 to H4, and the position of the tripod are marked as 1 to 3. The heights of the 4 antenna angel are also recorded.Figure 63m法电波暗室辐射场抗扰度场地均匀性校准规程e）天线垂直位置的定位Locate the vertical position of the antenna分别记录天线垂直极化的天线四角在暗室地面的上垂直投影点Hl、H2、H3、H4及天 线底座三脚
9、所在位置1、2、3,同时记录天线四角距地面的高度如图所示；Record the vertical position of the antenna as in figure 7, the vertical projection of the 4 angel of the antenna are marked as V1 to V4, and the position of the tripod are marked as 1 to 3. The heights of the 4 antenna angel are also recorded.Figure7f）连接电缆的定位Locate the
10、connection cable连接电缆，并记录电缆途径关键点，如下图;Connect the signal cable to the antenna, and the point where the cable pass by should berecord as in figure8:Figure 83m法电波暗室辐射场抗扰度场地均匀性校准规程g) 从80MHz开始，将场强探头放在某一均匀域测量点上(如22位置)，给天线供以一定 前向功率信号Pc,使得在场强探头上测得的场强值约为所需计量的场强值Ec(如10V/m) Position the sensor at one of the 16
11、points in the grid ( for example 22), and set the frequency of the single generator output to the frequency 80MHz. Apply a forward power to the field-generating antenna so that the field strength obtained equals Ec(for example 10V/m). Record the forward power and field strength readings.h）以1%的前一频率为步
12、长，重复步骤g），直到频率到达1GHz，生成的频率和输入前向 功率的表格如下：Increase the frequency by 1% of the present frequency, and repeat step g) until the frequency reach 1GHz. The forward power and the field strength reading should be record in table 1.fPTE22MHzdBmV/m80.0001080.8001081.6081082.4241083.2481084.08110。981.92010991.7
13、39101000.00010Table 13m法电波暗室辐射场抗扰度场地均匀性校准规程i) 将探头分别移到移到网格中的其他15 个位置，给天线供以上表1 中的前向功率的信号Pc,记录15个点上测量的每个频点上的实测场强，记录在下表中；Move the sensor to other 15 positions in the grid. At each of position, the forward power in table1 should be used. And the measure field strength should be recorded in table 2fPCE1tE12E13E14E21E22E23E24E31E32E33E34E41E42E43e44MHzdBmV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/m80.00080.80081.60882.42483.24884.081。981.920991.7391000.000Table 23m法电波暗室辐射场抗扰度场地均匀性校准规程5 数据处理：The calculating procedure:a) 将表 2中的测量场强值按从
