coaxial cable

Coaxial cables

 

Coaxial cables are cables intended for radio frequency and have two conductors in the same axis, that is why they are called coaxial cables. Internal conductor

Construction:-

Inner Conductor – Conductor consists of solid or stranded copper wires. These fine strands are twisted to form a junction-free conductor. Depending on the specifications, the shape of the conductor varies, ie.

A common copper conductor

Tinned copper conductor

Silver plated copper conductor

Copper-plated steel wires

The above conductors are provided according to resistivity, tensile strength, conductivity etc.

 

Dielectric:-

Said conductor is insulated with insulating material without air bubbles or air films and should maintain the center of the conductor exactly. Generally used insulation materials are…

Rigid polyethylene

Semi-rigid or foamed polyethylene

Synthetic rubber

PTFE

 

Outer conductor:-

The conductor laid in a common axis with the central conductor is called shielding, which is provided by lapping or cross braiding. The shielding should have no breach for less than 300mm. The outer conductor consists of the following material according to construction specifications.

Annealed bare copper.

Annealed tinned copper.

Silver plated copper.

 

Outer shell:-

The outer casing of such product is provided with a general coating of PVC compound as per IS 5831 OR synthetic rubber or PTFE casing to ensure a uniform casing. For PTFE, the overlap should not be less than 125%. Other types of cladding materials are also specified depending on the specifications.

 

Quality control: -

A number of tests are performed to create the perfect cable and provide accurate results

on advanced electronic testing equipment.

Conductivity tests.

Insulation resistance.

Spread speed.

Capacity

Corona tests etc.