Coaxial Cable

CoaxialGalaxy is a leading supplier of coaxial cable.  Coaxial cables, or RF cables, are typically used in applications when transferring radio frequencies are necessary.  Coaxial or RF cables are used in a wide range of applications including broadband CATV, telecommunications, antennae, video, data control and instrumentation.

What is Coaxial Cable?

Coaxial cables are used to transmit signals from one location to another.  A coaxial cable is typically referred to by its impedance or RG type, for example, 50 ohms or RG-X type cable.  Even though a coaxial cable can be called out using an RG type, the more formal part number includes the mil-spec call out.  The mil-spec call out for coaxial cables is Mil-C-17.  Mil-C-17 was created to standardize coaxial cables.

Coaxial cables conduct a signal through an inner copper conductor which can be solid or stranded.  Surrounding this inner conductor is an insulating layer commonly referred to as the dielectric.  This dielectric is often polyurethane or polyethylene. The dielectric material helps maintain consistent electrical properties when in use.  Typically the next layer would be the shielding.  Then there would be metallic braid or tape shield covering the dielectric.  Shielding protects the loss of signal and prevents electromagnetic interference (EMI) and radio frequency interference, (RFI).  Lastly, there would be an overall cable jacket which could be one of many different types.  The main function of the jacket is protection from the environment as well as additional insulation. Jacket types could include:

  • Polyvinyl Chloride (PVC)
  • Polyethylene (PE)
  • Flourinated Ethylene Propylene (FEP)
  • Polytetrafluoroethylene (PTFE)

Coaxial Applications

Because of their wide range of capabilities, coaxial cables are often chosen for, but not limited to, the following applications:

  • Cable Television
  • Radar
  • Communication
  • Radio Frequency (RF)
  • Instrumentation
  • Antennae
  • Data Control
  • Military
  • Aerospace
  • WLAN
  • Cellular and Wireless
  • Test and Measurement Equipment
  • Low Smoke Zero Halogen (LSZH) Applications

Galaxy Differentiators / Advantages for Coaxial Cable

Galaxy can provide all forms of coaxial cable for any application.  If the coaxial cable required does not currently exist, Galaxy has the ability to assist in the design and engineering of a custom designed coaxial cable. Galaxy’s wire and cable experts often work with customers to help select coaxial cables that are perfectly suited for specific applications. And Galaxy’s coaxial cable assembly services can be utilized if the coaxial cable is to be built into an assembly.


Galaxy offers coaxial cables that are:


Coaxial cable from Galaxy is available with the following materials:

  • Polyvinyl Chloride (PVC)
  • Polyeurothane (PE)
  • Thermoplastic Elastomer (TPE)
  • Perfluoroalkoxy (PFA)
  • Fluorinated Ethylene Propylene (FEP)
  • Polytetrafluoroethylene (PTFE)
  • Tefzel®

Coaxial Cable Technical Specifications

The following is a sample of the coaxial cable Galaxy offers in the following ranges of technical specifications:

Cable Type Mil Designation Impedance Dielectric NOM OD (IN) Shield
RG-6 M17/2-RG6 75 PE 0.332 BRAID
RG-8 52 PE 0.405 BRAID
RG-9 51 PE 0.42 BRAID
RG-11 M17/6-RG11 75 PE 0.405 BRAID
RG-58 M17/28-RG58 52 PE 0.195 BRAID
RG-59 M17/29-RG59 75 PE 0.242 BRAID
RG-62 M17/30-RG62 93 ASP 0.242 BRAID
RG-122 M17/54-RG122 50 PE 0.16 BRAID
RG-133 M17/100-RG133 95 PE 0.405 BRAID
RG-142 M17/60-RG142 50 PTFE 0.195 BRAID
RG-178 M17/93-RG178 50 PTFE 0.072 BRAID
RG-179 M17/94-RG179 70 PTFE 0.1 BRAID
RG-180 M17/95-RG180 93 PTFE 0.14 BRAID
RG-195 95 PTFE 0.145 BRAID
RG-213 M17/74-RG213 50 PE 0.405 BRAID
RG-214 M17/75-RG214 50 PE 0.425 BRAID
RG-223 M17/84-RG223 50 PE 0.211 DB BRAID
RG-302 M17/110-RG302 75 PTFE 0.201 BRAID
RG-303 M17/111-RG303 50 PTFE 0.17 BRAID
RG-304 M17/112-RG304 50 PTFE 0.28 BRAID
RG-316 M17/113-RG315 50 PTFE 0.1 BRAID
RG-391 M17/126-RG391 72 NA 0.405 BRAID
RG-392 M17/126-RG392 72 NA 0.475 BRAID
RG-393 M17/127-RG393 50 PTFE 0.39 BRAID
RG-400 M17/128-RG400 50 PTFE 0.195 DB BRAID
RG-401 M17/129-RG401 50 PTFE 0.25 BRAID
RG-402 M17/130-RG402 50 PTFE 0.141 BRAID
RG-403 M17/131-RG403 50 PTFE 0.118 DB BRAID
RG-404 M17/132-RG404 50 PTFE 0.073 BRAID
RG-405 M17/133-RG405 50 PTFE 0.086 BRAID

Terminology Notes

There are various terms used in the wire and cable industry related to this type of cable. They include:

  • Ohm – The ohm is defined as a resistance between two points of a conductor when a constant potential difference of 1.0 volt, applied to these points, produces in the conductor a current of 1.0ampere, the conductor not being the seat of any electromotive force.
  • Impedance – the ratio of the voltage phasor to the electric current phasor, a measure of the opposition to time-varying electric current in an electric circuit.
  • Dielectric – insulator material used in coaxial cables.
  • Capacitance – The capacitance of a coaxial line varies with the spacing of the conductors, the dielectric constant, and as a result the impedance of the line.
  • VSWR – Voltage Standing Wave Ratio is a function of the reflection coefficient, which describes the signal reflected back from a connector.
  • Attenuation – is a reduction of signal strength during transmission.

Contact Galaxy Wire & Cable for Coaxial Cable

Contact Galaxy for further assistance with coaxial cables.

Tefzel® is a registered trademarks of E. I. du Pont de Nemours and Company.