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标题: 电磁场干扰常用单位换算 [打印本页]

作者: jackzhang01 时间: 2016-7-15 23:46 标题: 电磁场干扰常用单位换算

1.  电磁场&功率密度dBμV/m to V/m
   V/m = 10  (((dBμV/m) -120) / 20)
V/m to dBμV/m
   dBμV/m = 20 log(V/m) + 120

dBμV/m to dBmW/m2
  dBmW/m2 = dBμV/m – 115.8
dBmW/m2 to dBμV/m
  dBμV/m = dBmW/m2 + 115.8

dBμV/m to dBμA/m
dBμA/m = dBμV/m – 51.5
dBμA/m to dBμV/m
dBμV/m = dBμA + 51.5

dBμA/m to dBpT
DBpT = dBμA/m + 2

dBpT to dBμA/m
dBμA/m = dBpT – 2
W/m2 to V/m
   V/m = SQRT(W/m2 * 377)
V/m to W/m2
   W/m2 = (V/m)2 / 377

μT to A/m
A/m = μT / 1.25
A/m to μT
μT = 1.25 * A/m

2.功率

dBm to Watts
W = 10 ((dBm – 30)/10)

Watts to dBm
dBm = 10log(W) + 30

dBW to Watts
W = 10 (dBW / 10)

Watts to dBW
dBW = 10log(W)

dBW to dBm
dBm = dBW + 30

dBm to dBW
dBW = dBm - 30

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