Structural Return Loss Vs. SWR
Structural Return Loss = 20 * log10 * (Voltage Reflected / Voltage Reference)
Vreflected / Vreference Structrual Return Loss (dB) SWR
1.12 1 17.40
1.26 2 8.72
1.413 3 5.85
1.585 4 4.42
1.778 5 3.57
1.995 6 3.00
2.239 7 2.62
2.512 8 2.32
2.818 9 2.10
3.162 10 1.92
3.584 11 1.78
3.981 12 1.67
4.467 13 1.58
5.012 14 1.50
5.623 15 1.43
6.310 16 1.38
7.079 17 1.33
7.943 18 1.29
8.931 19 1.25
10.00 20 1.22
11.22 21 1.20
12.59 22 1.17
14.13 23 1.15
15.85 24 1.13
17.78 25 1.12
19.95 26 1.11
22.39 27 1.09
25.12 28 1.08
28.18 29 1.07
31.62 30 1.06
35.48 31 1.058
39.81 32 1.051
44.67 33 1.046
50.12 34 1.041
56.23 35 1.036
63.10 36 1.032
70.79 37 1.029
79.43 38 1.026