Field Strength RoomCap
 
15th  July 2006

Here follows the field strength data of the
RoomCap Antenna.

This allows, among others, to determine the
security distance for the EMF regulation.

Field measurements performed 5th.July 2006
------------------------------------------

performed by HB9BWN and HB9ABX
sport field Bachgraben / Basel-Allschwil

Measured antenna:RoomCap 20m (w/o top capacity)

Transmit frequency = 14 Mhz

Distance = horizontal distance of sensor to radiator
Height = height of sensor above ground
Ant-Height = height of couterplanes above ground
Input power to antenna = 100 W


E-sensor / Ant-Height = 50cm / 100 W

Distance = 10m   
    Height = 30cm / 1m / 1,5m / 2m
             4,6   6,0   8,3    9,1  V/m

Distance = 5m
    Height = 30cm / 1m / 1,5m /  2m
             8,8  11,7  13,2   14,7  V/m
   
Distance = 4m
    Height = 30cm / 1m / 1,5m /  2m
             10,8  13,3  17,1   18,2 V/m

Distance = 3m
    Height = 30cm / 1m / 1,5m /  2m
             14,2  20,2  22,3   23,4 V/m

Distance = 2m
    Height = 30cm / 1m  / 1,5m /  2m
             21,5  34,6  41,2   42,6 V/m



H-sensor/ Ant-Height = 50cm / 100 W

Distance = 10m
    Height = 30cm / 1m / 1,5m /  2m       
             13    13    14      15 mA/m

Distance = 5m
    Height = 30cm / 1m  / 1,5m /  2m
             24    25     26      27 mA/m

Distance = 4m
    Height = 30cm / 1m  / 1,5m /  2m
             29     30    32      35 mA/m

Distance = 3m
    Height = 30cm / 1m  / 1,5m /  2m
             39     41    47      49 mA/m

Distance = 2m
    Height = 30cm / 1m  / 1,5m /  2m
             55     61    72      77 mA/m

Distance = 1m
    Height = 30cm / 1m  / 1,5m /  2m
            115    137    181    150 mA/m



E-Field / Distance 20cm / 10W

bottom    400  V/m
middle    550  V/m
top       420  V/m

H-Field / Distance 20cm / 10W

Resultat:   0,2   A/m



Measuring instrument:

Wandel&Goltermann
Type  = EMR-200
Serie = BN 2244/21

H-sensor = 12.1 / 2244 / 90.28
E-sensor =  8.2 / 2244 / 90.20



Felix Meyer HB9ABX
 


Back