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标题: 【小编】关于驻波比与回波损耗的换算分析  [查看完整版帖子] [打印本页]

时间:  2013-5-15 16:31
作者: 来支雪茄     标题: 【小编】关于驻波比与回波损耗的换算分析

驻波比(VSWR)是指微波传输过程中,最大电压与最小电压之比,是一个比值。
回波损耗(Return Loss)是指反射功率,单位是dB,RL和驻波比可以换算,RL= -20 lg [( VSWR-1 ) / ( VSWR + 1 )]

驻波比与回波损耗的换算关系
驻波比(VSWR): Voltage Standing Wave Ratio
回波损耗(RL) :Return Loss
换算公式:RL=20*log10[(VSWR+1)/(VSWR-1)]
回波损耗
VSWR
反射系数
匹配率%
失配率%
1
17.391
0.891
20.567
79.433
2
8.724
0.794
36.904
63.096
3
5.848
0.708
49.881
50.119
4
4.419
0.631
60.189
39.811
5
3.570
0.562
68.377
31.623
6
3.010
0.501
74.881
25.119
7
2.615
0.447
80.047
19.953
8
2.323
0.398
84.151
15.849
9
2.100
0.355
87.411
12.589
10
1.925
0.316
90.000
10.000
11
1.785
0.282
92.057
7.943
12
1.671
0.251
93.690
6.310
13
1.577
0.224
94.988
5.012
14
1.499
0.200
96.019
3.981
15
1.433
0.178
96.838
3.162
16
1.377
0.158
97.488
2.512
17
1.329
0.141
98.005
1.995
18
1.288
0.126
98.415
1.585
19
1.253
0.112
98.741
1.259
20
1.222
0.100
99.000
1.000
21
1.196
0.089
99.206
0.794
22
1.173
0.079
99.369
0.631
23
1.152
0.071
99.499
0.501
24
1.135
0.063
99.602
0.398
25
1.119
0.056
99.684
0.316
26
1.106
0.050
99.749
0.251
27
1.094
0.045
99.800
0.200
28
1.083
0.040
99.842
0.158
29
1.074
0.035
99.874
0.126
30
1.065
0.032
99.900
0.100
31
1.058
0.028
99.921
0.079
32
1.052
0.025
99.937
0.063
33
1.046
0.022
99.950
0.050
34
1.041
0.020
99.960
0.040
35
1.036
0.018
99.968
0.032
36
1.032
0.016
99.975
0.025
37
1.029
0.014
99.980
0.020
38
1.025
0.013
99.984
0.016
39
1.023
0.011
99.987
0.013
40
1.020
0.010
99.990
0.010
41
1.018
0.009
99.992
0.008
42
1.016
0.008
99.994
0.006
43
1.014
0.007
99.995
0.005
44
1.013
0.006
99.996
0.004
45
1.011
0.006
99.997
0.003
46
1.010
0.005
99.997
0.003
47
1.009
0.004
99.998
0.002
48
1.008
0.004
99.998
0.002
49
1.007
0.004
99.999
0.001
50
1.006
0.003
99.999
0.001





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