Coaxial Cable

What is a coaxial cable?

Is a type of cable used in video-audio applications, commonly used for cable Tv and satellite installation.

is there many types of Coaxial cables but will cover in this article the commonly ones:

RG 6

RG 59

RG 58

RG6U or quad shield.

this kind of cables are composed of 3 parts

A) plastic cover

B) threaded mesh shield

C) inner dielectric insulator

D) cooper core

The mesh or threaded mesh shield provides insulation against interferences of other signals of the same type that other nearer lines are carrying.

Cable RG6 Y RG6U

Cable RG6

This cable is the thicker for Video applications, is commonly used for installations of cable TV, from the satellite dish to the set top box,is more rigid and the shield is thicker this cable have the following technical features:

8,5 Milimeters of diameter

75 OHM Ω

Velocity Factor 0.66

the following are the attenuation rates by each 100 metres of cable are expressed in dB 100 metres (109 yards) or 328 foots

10MHZ 2.72 dB

50MHZ 6.23dB

100MHZ 8,86 dB

200MHZ 13,50dB

400MHZ 19,4dB

1GHZ 32,15dB

3GHZ 75.5 dB

RG6U or Quad

This cable is thicker than the RG6 the difference is because the cable RG6Quad have double shield that is composed by 4 mesh and this provides highest immunity to the interferences of signals of the same type of nearer lines , this is commonly used in satellite dish to receiver installations by the highest immunity features also is used in digital cable and Digital television applications, this provides the highest flow of data and less leakage of signal .

Impedance 75OHM

Velocity factor 0.66

Attenuation rates per 100 metres of cable

(109 yards) or 328 foots

10MHZ 2.4 dB

71.5MHZ 5.2 dB

135MHZ 6.9 dB

270MHZ 9.7dB

540MHZ 13.9 dB

1GHZ 19.3 dB

3GHZ 35.0 dB

cable RG 59

RG58

This cable is the thinner and is used commonly for do extension of the existent cable TV to another television, have a thinner shield so have a high rate of leakage of signal and the cooper core is thinner so is a risk that can get broken by excessive manipulation, are those cables only for use of video camera surveillance or low end television applications.

Diameter RG58 50 milimeters

RG59 6,2MM

Impedances OHM Ω

RG58 50 Ω OHM

RG59 75 ΩOHM

Velocity Factor 0.66 RG58/RG59

Attenuation rates cable RG 58 per 100 meters

10MHZ 4.59 dB

50MHZ 10.80 dB

100MHZ 16.10 dB

200MHZ 24.30 dB

400MHZ 39.40 dB

1GHZ 78.70 dB

3GHZ 177.0 dB

Attenuation rates cable RG 59

10MHZ 3.61 dB

50MHZ 7.87 dB

100MHZ 11.20 dB

200MHZ 16.10 dB

400MHZ 23.00 dB

1GHZ 39.40 dB

3GHZ 86.9 dB