Effect of VSWR on Transmitted Power
The VSWR is a measure, of the amount of mismatch between the load (Antenna) and the transmission lines impedance. A VSWR of 1 is a perfect match which occurs on a transmission line where there are no reflections. A VSWR less than 1.5:1 is considered good and a VSWR greater than 2:1 is usually unacceptable.
|
VSWR
|
Return Loss dB
|
Power Transmitted %
|
Reflected Power %
|
|
1.00
|
100.0
|
0.0
|
|
|
1.01
|
46.1
|
100.0
|
0.0
|
|
1.02
|
40.1
|
100.0
|
0.0
|
|
1.03
|
36.6
|
100.0
|
0.0
|
|
1.04
|
34.2
|
100.0
|
0.0
|
|
1.05
|
32.3
|
99.9
|
0.1
|
|
1.06
|
30.7
|
99.9
|
0.1
|
|
1.07
|
29.4
|
99.9
|
0.1
|
|
1.08
|
28.3
|
99.9
|
0.1
|
|
1.09
|
27.3
|
99.8
|
0.2
|
|
1.10
|
26.4
|
99.8
|
0.2
|
|
1.11
|
25.7
|
99.7
|
0.3
|
|
1.12
|
24.9
|
99.7
|
0.3
|
|
1.13
|
24.3
|
99.6
|
0.4
|
|
1.14
|
23.7
|
99.6
|
0.4
|
|
1.15
|
23.1
|
995
|
0.5
|
|
1.16
|
22.6
|
99.5
|
0.5
|
|
1.17
|
22.1
|
99.4
|
0.6
|
|
1.18
|
21.7
|
99.3
|
0.7
|
|
1.19
|
21.2
|
99.2
|
0.8
|
|
1.20
|
20.8
|
99.2
|
0.8
|
|
1.21
|
20.4
|
99.1
|
0.9
|
|
1.22
|
20.1
|
99.0
|
1.0
|
|
1.23
|
19.7
|
98.9
|
1.1
|
|
1.24
|
19.4
|
98.9
|
1.1
|
|
1.25
|
19.1
|
98.8
|
1.2
|
|
1.26
|
18.8
|
98.7
|
1.3
|
|
1.27
|
18.5
|
98.6
|
1.4
|
|
1.28
|
18.2
|
98.5
|
1.5
|
|
1.29
|
17.9
|
98.4
|
1.6
|
|
1.30
|
17.7
|
98.3
|
1.7
|
|
1.32
|
17.2
|
98.1
|
1.9
|
|
1.34
|
16.8
|
97.9
|
2.1
|
|
1.36
|
16.3
|
97.7
|
2.3
|
|
1.38
|
15.9
|
97.5
|
2.5
|
|
1.40
|
15.6
|
97.2
|
2.8
|
|
VSWR
|
Return Loss dB
|
Power Transmitted %
|
Reflected Power %
|
|
1.42
|
15.2
|
97.0
|
3.0
|
|
1.44
|
14.9
|
96.7
|
3.3
|
|
1.46
|
14.6
|
96.5
|
3.5
|
|
1.48
|
14.3
|
96.3
|
3.7
|
|
1.50
|
14.0
|
96.0
|
4.0
|
|
1.52
|
13.7
|
95.7
|
4.3
|
|
1.54
|
13.4
|
95.5
|
4.5
|
|
1.56
|
13.2
|
95.2
|
4.8
|
|
1.58
|
13.0
|
94.9
|
5.1
|
|
1.60
|
12.7
|
94.7
|
5.3
|
|
1.62
|
12.5
|
94.4
|
5.6
|
|
1.64
|
12.3
|
94.1
|
5.9
|
|
1.66
|
12.1
|
93.8
|
6.2
|
|
1.68
|
11.9
|
93.6
|
6.4
|
|
1.70
|
11.7
|
93.3
|
6.7
|
|
1.72
|
11.5
|
93.0
|
7.0
|
|
1.74
|
11.4
|
92.7
|
7.3
|
|
1.76
|
11.2
|
92.4
|
7.6
|
|
1.78
|
11.0
|
92.1
|
7.9
|
|
1.80
|
10.9
|
91.8
|
8.2
|
|
1.82
|
10.7
|
91.5
|
8.5
|
|
1.84
|
10.6
|
91.3
|
8.7
|
|
1.86
|
10.4
|
91.0
|
9.0
|
|
1.88
|
10.3
|
90.7
|
9.3
|
|
1.90
|
10.3
|
90.4
|
9.6
|
|
1.92
|
10.0
|
90.1
|
9.9
|
|
1.94
|
9.9
|
89.8
|
10.2
|
|
1.96
|
9.8
|
89.5
|
10.5
|
|
1.98
|
9.7
|
89.2
|
10.8
|
|
2.00
|
9.5
|
88.9
|
11.1
|
|
2.50
|
7.4
|
81.6
|
18.4
|
|
3.00
|
6.0
|
75.0
|
25.0
|
|
4.00
|
4.4
|
64.0
|
36.0
|
|
5.00
|
3.5
|
55.6
|
44.4
|
|
10
|
1.7
|
33.1
|
66.9
|
|
20
|
0.9
|
18.9
|
81.9
|
