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These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient
(Γ). A table of convenient values are presented at the bottom.
Here is a JavaScript calculator for
VSWR / Return Loss / Reflection
Coefficient / Mismatch Error / Improvement
Complex Impedances:
Note: VSWR values were used to calculate the other two related values (rounded to 3 significant places)
| 46.1 |
1.01 |
0.00498 |
25.7 |
1.11 |
0.0521 |
18.0 |
1.29 |
0.126 |
8.0 |
2.32 |
0.398 |
| 40.1 |
1.02 |
0.00990 |
24.9 |
1.12 |
0.0566 |
17.0 |
1.33 |
0.141 |
7.0 |
2.61 |
0.447 |
| 36.6 |
1.03 |
0.0148 |
24.3 |
1.13 |
0.0610 |
16.0 |
1.38 |
0.158 |
6.0 |
3.01 |
0.501 |
| 34.1 |
1.04 |
0.0196 |
23.7 |
1.14 |
0.0654 |
15.0 |
1.43 |
0.178 |
5.0 |
3.57 |
0.562 |
| 32.3 |
1.05 |
0.0244 |
23.1 |
1.15 |
0.0698 |
14.0 |
1.50 |
0.200 |
4.0 |
4.42 |
0.631 |
| 30.7 |
1.06 |
0.0291 |
22.6 |
1.16 |
0.0783 |
13.0 |
1.58 |
0.224 |
3.0 |
5.85 |
0.708 |
| 29.4 |
1.07 |
0.0338 |
21.7 |
1.18 |
0.0826 |
12.0 |
1.67 |
0.251 |
2.0 |
8.72 |
0.794 |
| 28.3 |
1.08 |
0.0385 |
20.8 |
1.20 |
0.0909 |
11.0 |
1.78 |
0.282 |
1.0 |
17.4 |
0.891 |
| 27.3 |
1.09 |
0.0431 |
20.0 |
1.22 |
0.100 |
10.0 |
1.92 |
0.316 |
0.5 |
34.8 |
0.944 |
| 26.4 |
1.10 |
0.0476 |
19.0 |
1.25 |
0.112 |
9.0 |
2.10 |
0.355 |
0.0 |
Infinity |
1.00 |
Related Pages on RF Cafe - VSWR - Return Loss
- Γ Conversions -
VSWR <--> Return Loss <--> Γ
Conversion Calculator - VSWR Mismatch Errors
- VSWR Reduction by Matched Attenuator
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