Cable Type144 MHz 220 MHz450 MHz 915 MHz1.2 GHz 2.4 GHz5.8 GHz
RG-586.2

(20.3)

7.4

(24.3)

10.6

(34.8)

16.5

(54.1)

21.1

(69.2)

32.2

(105.6)

51.6

(169.2)

RG-8X4.7

(15.4)

6.0

(19.7)

8.6

(28.2)

12.8

(42.0)

15.9

(52.8)

23.1

(75.8)

40.9

(134.2)

LMR-2403.0

(9.8)

3.7

(12.1)

5.3

(17.4)

7.6

(24.9)

9.2

(30.2)

12.9

(42.3)

20.4

(66.9)

RG-213/2142.8

(9.2)

3.5

(11.5)

5.2

(17.1)

8.0

(26.2)

10.1

(33.1)

15.2

(49.9)

28.6

(93.8)

99131.6

(5.2)

1.9

(6.2)

2.8

(9.2)

4.2

(13.8)

5.2

(17.1)

7.7

(25.3)

13.8

(45.3)

LMR-4001.5

(4.9)

1.8

(5.9)

2.7

(8.9)

3.9

(12.8)

4.8

(15.7)

6.8

(22.3)

10.8

(35.4)

3/8" LDF 1.3

(4.3)

1.6

(5.2)

2.3

(7.5)

3.4

(11.2)

4.2

(13.8)

5.9

(19.4)

8.1

(26.6)

LMR-6000.96

(3.1)

1.2

(3.9)

1.7

(5.6)

2.5

(8.2)

3.1

(10.2)

4.4

(14.4)

7.3

(23.9)

1/2" LDF 0.85

(2.8)

1.1

(3.6)

1.5

(4.9)

2.2

(7.2)

2.7

(8.9)

3.9

(12.8)

6.6

(21.6)

7/8" LDF 0.46

(1.5)

0.56

(2.1)

0.83

(2.7)

1.2

(3.9)

1.5

(4.9)

2.3

(7.5)

3.8

(12.5)

1 1/4" LDF 0.34

(1.1)

0.42

(1.4)

0.62

(2.0)

0.91

(3.0)

1.1

(3.6)

1.7

(5.6)

2.8

(9.2)

1 5/8" LDF 0.28

(0.92)

0.35

(1.1)

0.52

(1.7)

0.77

(2.5)

0.96

(3.1)

1.4

(4.6)

2.5

(8.2)

Attenuation of Coaxial Transmission Lines in the VHF/UHF/Microwave Amateur and ISM Bands
  LMR-1200 LMR-900 LMR-600 1/2”
Superflex
LMR-400 Belden
9913F7
9914 RG214
RG213
LMR-240 Belden
RG8X
LMR-200 LMR-195 RG-58/U
Frequency/Size 1.200” 0.870” 0.590” 0.520” 0.405” 0.405” 0.400” 0.405” 0.240” 0.242” 0.195” 0.195” 0.195”
30 MHz 0.209 0.288 0.421 0.561 0.7 0.8 0.8 1.2 1.3 2.0 1.8 1.8 2.5
50 MHz 0.272 0.374 0.547 0.730 0.9 1.1 1.1 1.6 1.7 2.5 2.3 2.3 3.1
150 MHz 0.481 0.658 0.964 1.29 1.5 1.7 1.7 2.8 3.0 4.7 3.9 4.0 6.2
220 MHz 0.589 0.803 1.18 1.58 1.8 2.1 2.1 3.5 3.7 6.0 4.8 4.8 7.4
450 MHz 0.864 1.17 1.72 2.32 2.7 3.1 3.1 5.2 5.3 8.6 6.9 7.0 10.6
900 MHz 1.27 1.70 2.50 3.41 3.9 4.4 4.5 8.0 7.6 12.8 9.9 9.9 16.5
1,500 MHz 1.69 2.24 3.31 4.57 5.1 6.0     9.9   12.7 12.9  

 
Coax Cable Signal Loss (Attenuation) in dB per 100ft*
Loss* RG-174 RG-58 RG-8X RG-213 RG-6 RG-11 RF-9914 RF-9913
1MHz 1.9dB 0.4dB 0.5dB 0.2dB 0.2dB 0.2dB 0.3dB 0.2dB
10MHz 3.3dB 1.4dB 1.0dB 0.6dB 0.6dB 0.4dB 0.5dB 0.4dB
50MHz 6.6dB 3.3dB 2.5dB 1.6dB 1.4dB 1.0dB 1.1dB 0.9dB
100MHz 8.9dB 4.9dB 3.6dB 2.2dB 2.0dB 1.6dB 1.5dB 1.4dB
200MHz 11.9dB 7.3dB 5.4dB 3.3dB 2.8dB 2.3dB 2.0dB 1.8dB
400MHz 17.3 B 11.2dB 7.9dB 4.8dB 4.3dB 3.5dB 2.9dB 2.6dB
700MHz 26.0dB 16.9dB 11.0dB 6.6dB 5.6dB 4.7dB 3.8dB 3.6dB
900MHz 27.9 B 20.1dB 12.6dB 7.7dB 6.0dB 5.4dB 4.9dB 4.2dB
1GHz 32.0dB 21.5dB 13.5dB 8.3dB 6.1dB 5.6dB 5.3dB 4.5dB
Imped 50ohm 50ohm 50ohm 50ohm 75ohm 75ohm 50ohm 50ohm
* Note: Coax losses shown above are for 100 feet lengths. Loss is a length multiplier, so a 200 ft length would have twice the loss shown above and a 50 ft length would have half the loss. This multiplier factor is why you should keep cable installation lengths between radios and antennas as short as practical!
Attenuation (dB per 100 feet)
Coax Attenuation Chart