Manual SPECTRAN V5
© Aaronia AG 2016 | www.aaronia.com
39
TABLES
8. Tables
8.1. Convesion tables
Table 1: Conversion dBm to W/m² with HyperLOG-antenna
Assuming the use of an „idealized“ measurement setup, like our HyperLOG antenna with 5dBi
gain and one of our 1m RG316U cables with 1dB damping, the following conversion table can
be applied to the signal sources below (figures in W/m²):
dBm
GSM900
UMTS
Lambda X
WLAN
GSM1800
+10
0.45
2.2
1.34
3.3
1.8
+9
0.36
1.8
1.06
2.7
1.4
+8
0.28
1.4
0.84
2.1
1.1
+7
0.23
1.1
0.67
1.7
0.90
+6
0.18
0.89
0.53
1.3
0.72
+5
0.14
0.70
0.42
1.06
0.57
+4
0.11
0.56
0.34
0.84
0.45
+3
0.09
0.44
0.27
0.67
0.36
+2
0.07
0.35
0.21
0.53
0.29
+1
0.06
0.28
0.17
0.42
0.23
0
0.045
0.022
0.13
0.033
0.018
-10
0.004 5
0.002 2
0.013
0.003 3
0.001 8
-20
0.000 45
0.000 22
0.001 3
0.000 33
0.000 18
-30
0.000 045
0.000 022
0.000 13
0.000 033
0.000 018
-40
0.000 004 5
0.000 002 2
0.000 013
0.000 003 3
0.000 001 8
-50
0.000 000 45
0.000 000 22
0.000 001 3
0.000 000 33
0.000 000 18
-60
0.000 000 045 0.000 000 022 0.000 000 13 0.000 000 033 0.000 000 018
We assumed the following center frequencies (f) here:
GSM900 (f = 900MHz),
Lambda X (f = 1550MHz),
GSM1800/DECT (f = 1800MHz),
UMTS (f = 2000MHz)
WLAN/microwave ovens (f = 2450MHz).
The conversion table demonstrates that per 10dB step, power density decreases by a factor of
10. This applies in a similar manner to the 1dB steps, which also change in a constant manner.
Consequently, this table permits easy and fast conversion of indicated dBm values (for exam
-
ple, from the optional PWK detector) into PEAK field strength or, respectively, power density in
W/m². This table can just as well be used with different antennas, attenuators or cables:
