| > | | | | its conductivity is really good. Silver plating |
| An Introduction to Cat 5 Cabling | | | | normally requires additional coating because of its |
| The coaxial cable was invented in 1929. However, | | | | oxidation in air. |
| its commercial use started only in 1941. Coaxial | | | | A full list of the various type of coaxial cable can |
| cables consist of round, cylindrical shaped wires | | | | be found at category5-cable.com |
| which is covered by a spacer, a cylinder shaped | | | | plenum-cat-5.html, and are summarized below: |
| sheath which in turn is surrounded by an insulating | | | | Hard Line - These are the powerful cables with |
| jacket. Coaxial cable is basically an electrical cable | | | | rigid outer shield and with minimum loss. Normally |
| and is used to transfer high frequency signals. The | | | | used to connect a transmitter and an antenna. |
| electromagnetic field generated is present in | | | | These cables consists of high dielectric in high |
| between the inner and the outer conductors. | | | | temperature as well. |
| There is therefore less interference from outer | | | | Tri axial - Cable with three layers of shielding and |
| electromagnetic fields. This type of cabling is used | | | | the outermost shielding protecting the inner layers |
| for industries like cable TV and networking. Coaxial | | | | from from outer electromagnetic interference. |
| cabling is a bit more costly than normal telephone | | | | Twin axial - This cable consists of a twisted pair |
| cabling. However, it is preferred because it allows | | | | covered by a shield. |
| maximum transmission of data and information | | | | Bi axial - Consists of two 50O coaxial cables used |
| with the least interference. | | | | for networking. |
| These cables are normally of two types- flexible | | | | Semi rigid - It is a coaxial cable with solid outer |
| and rigid. Rigid cables consist of solid type of | | | | copper sheath. |
| sheath and flexible cable consists of braided type | | | | Short type of coaxial cables are basically used for |
| sheath of copper. The inner insulator (or dielectric) | | | | home video, ham radio and some small computer |
| affects the cable's properties, such as attenuation | | | | networks while long coaxial cables connect radio |
| and impedance. RF connectors are used to | | | | or television networks. Micro coaxial cables are |
| connect the ends of coaxial cables. Dielectric may | | | | used by the military or medical use. |
| be solid or perforated with small holes. | | | | Micro coaxial cables are used in a range of |
| The RF connector is a short and a rigid type of | | | | consumer devices, military equipment and also in |
| cable having the same impedance as that of cable | | | | ultra-sound scanning equipment. The cables with |
| with which it is associated. However, the dielectric | | | | impedances of 50/52 and 75 ohms are commonly |
| may not be same. The connectors with high | | | | used. 50/52 ohm cables are normally used for |
| quality are normally coated with gold, but lower | | | | commercial purposes while 75 ohm cables are |
| quality cables are coated with nickel. Silver is also | | | | used for domestic purpose. |
| used (but only in case of high-end connectors) as | | | | |