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RG8X is a very practical 50 ohm coaxial cable that is a popular choice in applications that require better performance than RG-58 but also want to maintain relative lightness, flexibility, and cost-effectiveness, such as medium length antenna feeders for amateur radios and CB stations. Understanding its loss characteristics is crucial for planning system performance, especially in VHF/UHF. When selecting cables for specific applications, it is important to consider frequency, required length, power requirements, and installation environment.
| Structure parameters | ||
| Item | Material | Diamenter (mm) |
| Inner Conductor | copper wire | 2.74 |
| Dielectric | PE | 7.24 |
| Outer Conductor | Single layer bare copper wire weaving | 8.13 |
| Jacket | PVC | 10.16 |
| Performance parameters | ||
| Capacitor | 78.4pF/m | |
| Impedance | 50ohm | |
| Transmission rate | 85% | |
| Maximum operating voltage | 8KVrms | |
| Maximum operating frequency | 6 GHz | |
| Working temperature range | -40～+80℃ | |
| Bending radius | 25mm | |
| ROHS/CE/FCC | YES | |
| Frequency | 30MHz | 2.2dB/m |
| 50MHz | 2.9dB/m | |
| 150MHz | 5.0dB/m | |
| 220MHz | 6.1dB/m | |
| 450MHz | 8.9dB/m | |
| 900MHz | 12.8dB/m | |
There are many specifications and models of RG8 cables, with the main differences being conductor diameter, insulation material, shielding layer density, and outer sheath characteristics. The following are several common models and their characteristics:
RG8/U: standard model, impedance of 50 ohms, suitable for general communication and RF signal transmission.
RG8X: The conductor diameter is slightly smaller and has better flexibility, making it suitable for occasions that require frequent bending. RG8Foam: Using foamed polyethylene insulation layer to reduce signal loss, suitable for high-frequency applications.
RG8LowLoss: Optimized design to reduce signal attenuation, suitable for long-distance transmission. Different models of RG8 cables are suitable for different scenarios, and users can choose the appropriate specifications according to their specific needs.
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