Huawei Technologies ODU3601C-1900 CDMA Base Station User Manual Reflection
Huawei Technologies Co.,Ltd CDMA Base Station Reflection
Contents
Users Manual 7
User Manual
iSiteC ODU3601C CDMA Soft Base Station
BTS Maintenance
Appendix B Return Loss, VSWR and Reflection Coefficient
B-1
Appendix B Return Loss, VSWR and Reflection
Coefficient
Return loss (dB) Voltage Standing Wave Ratio
(VSWR) Reflection coefficient
Γ
4 4.41943 0.63096
5 3.56977 0.56234
6 3.00952 0.50119
7 2.61457 0.44668
8 2.32285 0.39811
9 2.09988 0.35481
10 1.92495 0.31623
11 1.78489 0.28184
12 1.6709 0.25119
13 1.57689 0.22387
14 1.49852 0.19953
15 1.43258 0.17783
16 1.37668 0.15849
17 1.32898 0.14125
18 1.28805 0.12589
19 1.25276 0.1122
20 1.22222 0.1
21 1.19569 0.08913
22 1.17257 0.07943
23 1.15238 0.07079
24 1.13469 0.0631
25 1.11917 0.05623
26 1.10553 0.05012
27 1.09351 0.04467
28 1.08292 0.03981
29 1.07357 0.03548
30 1.06531 0.03162
31 1.058 0.02818
32 1.05153 0.02512
33 1.0458 0.02239
34 1.04072 0.01995
35 1.03621 0.01778
36 1.03221 0.01585
37 1.02866 0.01413
38 1.0255 0.01259
39 1.0227 0.01122
40 1.0202 0.01
41 1.01799 0.00891
42 1.01601 0.00794
43 1.01426 0.00708
44 1.0127 0.00631
45 1.01131 0.00562
46 1.01007 0.00501
47 1.00897 0.00447
48 1.00799 0.00398
49 1.00712 0.00355
50 1.00634 0.00316
User Manual
iSiteC ODU3601C CDMA Soft Base Station
BTS Maintenance
Appendix B Return Loss, VSWR and Reflection Coefficient
B-2
The calculation formulas for reflection coefficient Γ, return Loss (RL), and VSWR are
displayed in the following table:
Reflection coefficient
Γ
VSWR Return loss (dB)
Γ=Ureflected
Uforward VSWR=Uforward+Ureflected
Uforward Ureflected RL=Uforward
Ureflected
20lg
Γ=1
alg( )
RL
20
VSWR=1+Γ
1−Γ
RL=1
Γ
20lg
Γ=VSWR−1
VSWR+1
VSWR =
alg( )
RL
20 −1
alg( )
RL
20 +1
RL=VSWR+1
VSWR−1
20lg
In the above formulas, Uforward stands for forward voltage and Urelected for reverse
voltage.