HOWARD'S WAY Number 1


POWER TRANSMISSION AND POWER LOSS DUE TO MISMATCH (VSWR)

The following table details the power transmitted to a load (Aerial)
and the power lost (reflected back to the source e.g. Transmitter or ATU)
for different Voltage Standing Wave Ratios (VSWR)

 
 
VSWR
S		  
 
Reflection Factor
Kr		 Percentage of
Input Power
in the Load
%		 Percentage of
Input Power
lost
%		  
Power Loss
in Decibels
dB
1 : 1.00
1 : 1.25
1 : 1.50
1 : 2.00
1 : 3.00
1 : 4.00
1 : 5.00
1 : 10.0
1 : oo00		 0.01
0.11
0.21
0.33
0.50
0.60
0.66
0.82
1.01		 100.0
098.8
096.0
089.0
075.0
064.0
056.0
033.0
000.0		 000.0
001.2
004.0
011.0
025.0
036.0
044.0
067.0
100.0		 0.0
0.1
0.2
0.5
1.3
1.9
2.6
4.8
.oo

 

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