Coaxial Cable

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How To

Impedance

Video

Type		Imped.	Core		Comments
RG-6/U		75 Ω	1.0 mm		low loss at high frequency for cable television, satellite television and cable modems
RG-11/U	75 Ω	1.63 mm		Used for long drops and underground
RG-59/U	75 Ω	0.81 mm		used to carry baseband video in closed-circuit television

HAM

Type		Imped.	Core		Loss			Comments
RG-58/U	50 Ω	0.9 mm		loss is 5 dB/100 feet	common. used for radiocommunication and amateur radio
RG-8/U		50 Ω	2.17 mm					common. used for amateur radio
RG-213/U	50 Ω	7×0.0296 in Cu	loss is 3 dB/100 feet	lower losss than RG-58
RG-218/U	50 Ω	0.195 in Cu	loss is 1 dB/100 feet


Coax Cable Attenuation Details

Coax Cable Attenuation Details:

Coax Cable Signal Loss (Attenuation) in dB per 100ft*

Loss @

RG-174

RG-58

RG-8X

RG-213

RG-6

RG-8U

RG-11

RF-9914

RF-9913

1MHz

1.9dB

0.4dB

0.5dB

0.2dB

0.2dB

0.1dB

0.2dB

0.3dB

0.2dB

10MHz

3.3dB

1.4dB

1.0dB

0.6dB

0.6dB

0.4dB

0.4dB

0.5dB

0.4dB

50MHz

6.6dB

3.3dB

2.5dB

1.6dB

1.4dB

1.1dB

1.0dB

1.1dB

0.9dB

100MHz

8.9dB

4.9dB

3.6dB

2.2dB

2.0dB

1.5dB

1.6dB

1.5dB

1.4dB

200MHz

11.9dB

7.3dB

5.4dB

3.3dB

2.8dB

2.1dB

2.3dB

2.0dB

1.8dB

400MHz

17.3 B

11.2dB

7.9dB

4.8dB

4.3dB

3.2dB

3.5dB

2.9dB

2.6dB

700MHz

26.0dB

16.9dB

11.0dB

6.6dB

5.6dB

4.2dB

4.7dB

3.8dB

3.6dB

900MHz

27.9 B

20.1dB

12.6dB

7.7dB

6.0dB

5.7dB

5.4dB

4.9dB

4.2dB

1000MHZ

22.0dB

21.5dB

13.5dB

8.3dB

6.1dB

5.9dB

5.6dB

5.3dB

4.5dB

Impedance

50ohm

50ohm

50ohm

50ohm

75ohm

50ohm

75ohm

50ohm

50ohm

Chart is based on 100 feet of coax.