衰减常 数
dB/100m
20°C≯
回波损耗
≥dB
|
50MHz
200MHz
300
450
550
750
800
1000
VHF
UHF
|
75±3
4.4
9.0
11.2
14.0
15.6
18.3
19.1
21.5
20
18
|
75±2.5
3.8
7.7
9.6
12.0
13.4
15.8
16.3
18.2
20
18
|
75±2.5
3.0
5.9
7.4
9.3
10.4
12.4
12.8
14.4
20
18
|
75±2.5
0.3
4.6
5.7
7.1
8.1
9.5
9.9
11.2
20
18
|
75±2.5
1.6
3.4
4.5
5.5
6.0
7.6
7.8
9.0
20
18
|