Standards
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Most coaxial cables have a characteristic impedance of either 50, 52, 75, or 93 Ω. The RF industry uses standard type-names for coaxial cables. Thanks to television, RG-6 is the most commonly used coaxial cable for home use, and the majority of connections outside Europe are by F connectors.
A series of standard types of coaxial cable were specified for military uses, in the form "RG-#" or "RG-#/U". They date from World War II and were listed in MIL-HDBK-216 published in 1962. These designations are now obsolete. The RG designation stands for Radio Guide; the U designation stands for Universal. The current military standard is MIL-SPEC MIL-C-17. MIL-C-17 numbers, such as "M17/75-RG214," are given for military cables and manufacturer's catalog numbers for civilian applications. However, the RG-series designations were so common for generations that they are still used, although critical users should be aware that since the handbook is withdrawn there is no standard to guarantee the electrical and physical characteristics of a cable described as "RG-# type". The RG designators are mostly used to identify compatible connectors that fit the inner conductor, dielectric, and jacket dimensions of the old RG-series cables.
| type | impedance ohms |
core | Dielectric Type | Dielectric VF | Dielectric in | Dielectric mm | OD in | OD mm | shields | comments | max attenuation @ 750 MHz db/100 ft |
|---|---|---|---|---|---|---|---|---|---|---|---|
| RG-6/U | 75 | 1.0 mm | PF | 0.75 | 0.185 | 4.7 | 0.270 | 6.86 | double | Low loss at high frequency for cable television, satellite television and cable modems | 5.65 |
| RG-6/UQ | 75 | PF | 0.298 | 7.57 | quad | This is "quad shield RG-6". It has four layers of shielding; regular RG-6 has only one or two | 5.65 | ||||
| RG-7 | 75 | 1.30 mm | PF | 0.225 | 5.72 | 0.320 | 8.13 | double | Low loss at high frequency for cable television, satellite television and cable modems | 4.57 | |
| RG-8/U | 50 | 2.17 mm | PE | 0.285 | 7.2 | 0.405 | 10.3 | Amateur radio; Thicknet (10BASE5) is similar | 5.967 | ||
| RG-8X | 50 | 1.0 mm | PF | 0.75 | 0.185 | 4.7 | 0.242 | 6.1 | double | A thinner version, with the electrical characteristics of RG-8U in a diameter similar to RG-6. | 10.946 |
| RG-9/U | 51 | PE | 0.420 | 10.7 | |||||||
| RG-11/U | 75 | 1.63 mm | PE | 0.66 | 0.285 | 7.2 | 0.412 | 10.5 | Triple/Quad | Used for long drops and underground conduit | 3.65 |
| RG-56/U | 48 | 1.4859 mm | 0.535 | 13.589 | Dual/Quad | Cable TV installations | |||||
| RG-58/U | 50 | 0.81 mm | PE | 0.66 | 0.116 | 2.9 | 0.195 | 5.0 | single | Used for radiocommunication and amateur radio, thin Ethernet (10BASE2) and NIM electronics, Loss 1.056 dB/m @ 2.4 GHz. Common. | 13.104 |
| RG-59/U | 75 | 0.81 mm | PE | 0.66 | 0.146 | 3.7 | 0.242 | 6.1 | single | Used to carry baseband video in closed-circuit television, previously used for cable television. In general, it has poor shielding but will carry an HQ HD signal or video over short distances. | 9.708 |
| 3C-2V | 75 | 0.50 mm | PE | 0.85 | 3.0 | 5.4 | single | Used to carry television, video observation systems, and other. PVC jacket. | |||
| 5C-2V | 75 | 0.80 mm | PE | 0.82 +/-2 | 0.181 | 4.6 | 0.256 | 6.5 | double | Used for interior lines for monitoring system, CCTV feeder lines, wiring between the camera and control unit and video signal transmission. PVC jacket. | |
| RG-60/U | 50 | 1.024 mm | PE | 0.425 | 10.8 | single | Used for high-definition cable TV and high-speed cable Internet. | ||||
| RG-62/U | 92 | PF | 0.84 | 0.242 | 6.1 | single | Used for ARCNET and automotive radio antennas. | ||||
| RG-62A | 93 | ASP | 0.242 | 6.1 | single | Used for NIM electronics | |||||
| RG-142 | 50 | 4.95 | double | ||||||||
| RG-174/U | 50 | 7x0.16 mm | PE | 0.66 | 0.059 | 1.5 | 0.100 | 2.55 | single | Common for wifi pigtails: more flexible but higher loss than RG58; used with LEMO 00 connectors in NIM electronics. | 23.565 |
| RG-178/U | 50 | 7×0.1 mm (Ag-plated Cu-clad Steel) |
PTFE | 0.69 | 0.033 | 0.84 | 0.071 | 1.8 | single | Used for high-frequency signal transmission. | 42.7 @ 900 MHz |
| RG-179/U | 75 | 7×0.1 mm (Ag-plated Cu) |
PTFE | 0.67 | 0.063 | 1.6 | 0.098 | 2.5 | single | VGA RGBHV | |
| RG-180B/U | 95 | 0.0120 in (Ag-plated Cu-clad steel) |
PTFE | 0.102 | 2.59 | 0.145 | 3.68 | single Ag covered Cu | VGA RGBHV | ||
| RG-188A/U | 50 | 7×0.16 mm (Ag-plated Cu-clad Steel) |
PTFE | 0.70 | 0.06 | 1.52 | 0.1 | 2.54 | single | 90 @ 900 MHz | |
| RG-213/U | 50 | 7×0.0296 in Cu | PE | 0.66 | 0.285 | 7.2 | 0.405 | 10.3 | single | For radiocommunication and amateur radio, EMC test antenna cables. Typically lower loss than RG58. Common. | 5.967 |
| RG-214/U | 50 | 7×0.0296 in | PE | 0.66 | 0.285 | 7.2 | 0.425 | 10.8 | double | Used for high-frequency signal transmission. | 6.702 |
| RG-218 | 50 | 0.195 in Cu | PE | 0.66 | 0.660 (0.680?) | 16.76 (17.27?) | 0.870 | 22 | single | Large diameter, not very flexible, low loss (2.5dB/100' @ 400 MHz), 11kV dielectric withstand. | 2.834 |
| RG-223/U | 50 | 0.88 mm | PE | 0.66 | 0.0815 | 2.07 | 0.212 | 5.4 | double | Silver-plated shields. Sample RG-223 Datasheet | 11.461 |
| RG-316/U | 50 | 7x0.0067 in | PTFE | 0.695 | 0.060 | 1.5 | 0.098 | 2.6 | single | used with LEMO 00 connectors in NIM electronics; | 22.452 |
| RG-400/U | 50 | 19x0.20mm | PTFE | 2.95 | 4.95 | double | 12.566 | ||||
| H155 | 50 | 19 x 0.28 mm | 0.79 | 5.4 | lower loss at high frequency for radiocommunication and amateur radio | ||||||
| H500 | 50 | 0.82 | low loss at high frequency for radiocommunication and amateur radio | ||||||||
| LMR-100 | 50 | 2.79 | low loss communications, 1.36 dB/meter @ 2.4 GHz | 20.725 | |||||||
| LMR-195 | 50 | 4.95 | low loss communications, 0.620 dB/meter @ 2.4 GHz | 10.125 | |||||||
| LMR-200 HDF-200 CFD-200 |
50 | 1.12 mm Cu | PF | 0.83 | 0.116 | 2.95 | 0.195 | 4.95 | low loss communications, 0.554 dB/meter @ 2.4 GHz | 9.035 | |
| LMR-240 | 50 | 1.42 mm Cu | PF | 0.84 | 0.150 | 3.81 | 0.240 | 6.1 | double | Amateur radio, low loss replacement for RG-8X | 6.877 |
| LMR-400 HDF-400 CFD-400 |
50 | 2.74 mm (Cu-clad Al) |
PF | 0.85 | 0.285 | 7.24 | 0.405 | 10.29 | low loss communications, 0.223 dB/meter @ 2.4 GHz | 3.544 | |
| LMR-600 | 50 | 4.47 mm (Cu-clad Al) |
PF | 0.87 | 0.455 | 11.56 | 0.590 | 14.99 | low loss communications, 0.144 dB/meter @ 2.4 GHz | 2.264 | |
| LMR-900 | 50 | 6.65 mm (BC tube) |
PF | 0.87 | 0.680 | 17.27 | 0.870 | 22.10 | low loss communications, 0.098 dB/meter @ 2.4 GHz | 1.537 | |
| LMR-1200 | 50 | 8.86 mm (BC tube) |
PF | 0.88 | 0.920 | 23.37 | 1.200 | 30.48 | low loss communications, 0.075 dB/meter @ 2.4 GHz | 1.143 | |
| LMR-1700 | 50 | 13.39 mm (BC tube) |
PF | 0.89 | 1.350 | 34.29 | 1.670 | 42.42 | low loss communications, 0.056 dB/meter @ 2.4 GHz | 0.844 | |
| QR-320 | 75 | 1.80 mm | PF | 0.395 | 10.03 | single | Low loss line, which replaced RG-11 in most applications | 3.34 | |||
| QR-540 | 75 | 3.15 mm | PF | 0.610 | 15.49 | single | Low loss hard line | 1.85 | |||
| QR-715 | 75 | 4.22 mm | PF | 0.785 | 19.94 | single | Low loss hard line | 1.49 | |||
| QR-860 | 75 | 5.16 mm | PF | 0.960 | 24.38 | single | Low loss hard line | 1.24 | |||
| QR-1125 | 75 | 6.68 mm | PF | 1.225 | 31.12 | single | Low loss hard line | 1.01 |
Dielectric Material Codes
- FPE is foamed polyethylene
- PE is solid polyethylene
- PF is polyethylene foam
- PTFE is polytetrafluoroethylene;
- ASP is air space polyethylene
VF is the Velocity Factor; it is determined by the effective and
- VF for solid PE is about 0.66
- VF for foam PE is about 0.79 to 0.88
- VF for air is about 1.00
- VF for solid PTFE is about 0.70
- VF for foam PTFE is about 0.84
There are also other designation schemes for coaxial cables such as the URM, CT, BT, RA, PSF and WF series.
Read more about this topic: Coaxial Cable
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