電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程

1、2009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程技術(shù)文件3m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程The method of uniform field strength calibration in 3mchamber第一版The 儼 edition批準(zhǔn):審定:編制:日期:日期:日期:2009.05.20QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程1適用范圍和目的Scope and object:IEC61000-4-3測(cè)試中的場(chǎng)地均勻性校準(zhǔn)The calibration of field in IEC610

2、00-4-32引用文件Normative referencesIEC 61000-4-3: 1998電磁兼容試驗(yàn)和測(cè)量技術(shù)射頻電磁場(chǎng)輻射抗擾度試驗(yàn)Testing and measurement techniques- Radiated, radio-frequency, electromagnetic field immunity test3校準(zhǔn)使用的儀器設(shè)備：Test equipment: 3m法電波暗室Anechoic chamber 射頻信號(hào)發(fā)生器RF signal generators: 寬頻功放 power amplifier 發(fā)射天線 field generating antenn

3、as 場(chǎng)強(qiáng)探頭 field strength monitoring antenna 場(chǎng)強(qiáng)儀 field strength monitor 功率儀power meter3m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程4校準(zhǔn)過(guò)程:a）場(chǎng)強(qiáng)探頭位置的確定Locate the field strength probe position確認(rèn)IEC61000-4-3標(biāo)準(zhǔn)測(cè)試中所使用垂直均勻域平面，定出需要校準(zhǔn)的16個(gè)點(diǎn)的位置;Locate the vertical uniform area and the 16 measuring point for calibration as following:Figu

4、re12009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程2009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程測(cè)試中，場(chǎng)強(qiáng)探頭應(yīng)放置在如圖1所示的16個(gè)點(diǎn)上，其中場(chǎng)強(qiáng)探頭的垂直投影應(yīng)分別落在圖2所示的地面上的1、2、3、4點(diǎn)上，如圖2;場(chǎng)強(qiáng)探頭的高度應(yīng)在圖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 figure1,the vertical pr

5、ojection 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法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程Figure 32009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程b）吸波材料位置的確認(rèn)Locate the absorber position在地面上鋪設(shè)使用的吸波材

6、料，記錄吸波材料的配設(shè)位置，mark1至mark4分別為吸波材料鋪設(shè)的4個(gè)角；Put additional absorber on the ground, and record the position of the 4 angle of the absorber as in figure 4:Figure 4c）將天線放置在距離垂直均勻域平面3m遠(yuǎn)的位置處Put the antenna on the point 3m away from uniform field area and make sure the direction ofthe antenna perpendicular to

7、the uniform field area as in figure 5:3m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程d）天線水平位置的定位Locate the horizontal position of the antenna分別記錄天線水平極化的大線四角在暗室地面的上垂直投影點(diǎn)H1、H2、H3、H4及大線底座三腳所在位置1、2、3,同時(shí)記錄大線四角距地面的高度hH如圖所示；Record the horizontal position of the antenna as in figure 6, the vertical projection of the 4 angel of the

8、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 62009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程e）天線垂直位置的定位Locate the vertical position of the antenna分別記錄大線垂直極化的大線四角在暗室地面的上垂直投影點(diǎn)H1、H2、H3、H4及大線底座三腳所在位置

9、1、2、3,同時(shí)記錄大線四角距地面的高度hv.如圖所示；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.Figure7Table 1f）連接電纜的定位Locat

10、e the connection cable連接電纜，并記錄電纜途徑關(guān)鍵點(diǎn)，如下圖；Connect the signal cable to the antenna, and the point where the cable pass by should berecord as in figure8:3m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程g) 從80MHz開始，將場(chǎng)強(qiáng)探頭放在某一均勻域測(cè)量點(diǎn)上(如 22位置)，給大線供以一定 前向功率信號(hào)Pc,使得在場(chǎng)強(qiáng)探頭上測(cè)得的場(chǎng)強(qiáng)值約為所需計(jì)量的場(chǎng)強(qiáng)值Ec(如10V/m )Position the sensor at one of the 16 p

11、oints 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%的前一頻率為步長(zhǎng)

12、，重復(fù)步驟g),直到頻率到達(dá)1GHz,生成的頻率和輸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。o0oo0oo0oo0oo0oo

13、0981.92010991.739101000.000102009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程i）將探頭分別移到移到網(wǎng)格中的其他 15個(gè)位置，給大線供以上表1中的前向功率的信號(hào)Pc,記錄15個(gè)點(diǎn)上測(cè)量的每個(gè)頻點(diǎn)上的實(shí)測(cè)場(chǎng)強(qiáng)，記錄在下表中；Move the sensor to other 15 positions in the grid. At each of position, the forward power in tablel should be used. And the measure field strength s

14、hould be recorded in table 2fPcE11E 12E 13E14E21E 22E23E24E31E 32E33E34E41E 42E43E44MHzdBmV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/m80.00080.80081.60882.42483.24884.081。oooooo00oooo00oooo00oooo00oooo00oo000000000000000000000000000000000000000000000000000000000000000000000000981.920991.7391000.

15、000Table 22009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程5數(shù)據(jù)處理：The calculating procedure:a）將表2中的測(cè)量場(chǎng)強(qiáng)值按從低往高排列，如表3;Sort the 1 field strength into ascending order as in table 3:From low to highfe1e2e3e4e5e6e7e8e9e10e11e12e13e14e15e16MHzV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/mV/m80.00080.80081.

16、60882.42483.24884.081。ooooooo00oooo00oooo00oooo00oooo00oooo00oooooooooooooooo00oooo00oooo00oooo00oooooooooooooooooooooo00o981.920991.7391000.000table32009.5.20XX檢測(cè)中心QJ/63.740-20093m法電波暗室輻射場(chǎng)抗擾度場(chǎng)地均勻性校準(zhǔn)規(guī)程b) 分別計(jì)算從小到大連續(xù) 12個(gè)場(chǎng)強(qiáng)的最大場(chǎng)強(qiáng)差值 R1至R5;Calculate the field strength deviation R1 to R5 of continuous 12 p

17、oint from low to high as following formula, and the data should be recorded in table 4:R1=20log(e12/e1)R2=20 log(e13/e2)R3=20 log(e14/e3)R4=20log(e15/e4)R5=20 log(e16/e5)fR1R2R3R4R5MHzV/mV/mV/mV/mV/m80.00080.80081.60882.42483.24884.081。oooooo00oooo00oooooooo0o00oooo00oo981.920991.7391000.000Table4c)

18、 場(chǎng)強(qiáng)差值從R1向R5,第一個(gè)小于6dB的值對(duì)應(yīng)的最小場(chǎng)強(qiáng)值(表4中)作為場(chǎng)地均勻性 校準(zhǔn)的參考場(chǎng)強(qiáng)Et,并記錄在下表中：Check the field strength deviation R1 to R5, the first one less than 6dB should be marked and the corresponding minimum field strength in table 3 should be record in table 5 as following:fPcEcMHzdBmV/m80.00080.80081.60882.42483.24884.081ooooooooooooo0oo981.920991.7391000.0002009.5.20XX檢測(cè)中心QJ/63.740-