Product Description
RG58 is a widely used, flexible, 50-ohm coaxial cable primarily designed for low-power signal and RF connections. It is commonly utilized in wireless communications, amateur radio, and base station infrastructure (such as jumper cables for GPS antennas or test equipment).
Constructed with a solid center conductor and a flexible PVC jacket, it offers a balance of performance and ease of installation, making it suitable for both permanent installations and temporary test setups where tight bends are required.
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Key Specifications
| Parameter |
Details |
| Impedance |
50 Ohms (Standard for RF & Data) |
| Nominal Velocity of Propagation (VP) |
66% (Signal travels at 66% the speed of light) |
| Capacitance |
29.5 pF/ft (96.8 pF/m) |
| Center Conductor |
Solid Copper or Tinned Copper (19 AWG) |
| Dielectric |
Solid Polyethylene (PE) |
| Shielding |
90% Tinned Copper Braided Shield |
| Outer Jacket |
Flexible PVC (Polyvinyl Chloride) |
| Max Operating Voltage |
1,900 V RMS (Peak) |
| Operating Temperature |
-55°C to +105°C |
| Attenuation (Loss) |
~0.4 dB per 10 meters at 400 MHz (Increases with frequency) |
| Weight |
Approx. 5.6 kg per 100 meters |
Physical Characteristics
- Nominal OD (Outer Diameter): 4.95 mm (0.195 inches)
- Bending Radius: 100 mm (4 inches) static; 125 mm (5 inches) dynamic.
- Flexibility: High flexibility due to the braided shield and PVC jacket, allowing it to be routed through tight spaces in equipment racks.
Common Connector Types
RG58 cable is typically terminated with the following connectors depending on the application:
- BNC (Bayonet Neill–Concelman): Most common for test instruments, GPS antennas, and RF modules.
- TNC (Threaded Neill–Concelman): Used in more secure connections (e.g., outdoor GPS timing antennas).
- N-Type: Larger connector, often used for higher power or main feeder connections (requires specific crimp tools for RG58).
- SMA (SubMiniature version A): Common in smaller wireless devices and radios.
Key Features
- 50-Ohm Impedance: Matches standard RF equipment, ensuring maximum power transfer and minimal signal reflection (VSWR).
- Cost-Effective: A budget-friendly solution for short-distance RF links and DC power injection.
- Reliable Shielding: The 90% braided shield provides good protection against electromagnetic interference (EMI) and radio frequency interference (RFI) in typical environments.
- Ease of Use: Its small diameter and flexibility make it easy to handle, route, and terminate in the field.
Applications
- GPS Antennas: Commonly used as jumper cables to connect GPS receivers to timing modules (e.g., in Nokia or Ericsson base stations).
- Test & Measurement: Used with spectrum analyzers, signal generators, and network analyzers.
- Ham Radio (Amateur Radio): Popular for short jumper cables between radios and antennas.
- Low-Power RF Systems: Suitable for Wi-Fi antennas, RFID readers, and walkie-talkies.
- DC Power Feeding: Often used to carry DC power to remote antennas (Power over Coax).
Important Note
While RG58 is very common, it has higher signal loss at higher frequencies (above 1 GHz) compared to thicker cables like LMR-400 or RG-8. It is best suited for short cable runs (typically under 20-30 meters). For longer runs or 4G/5G high-band applications, a lower-loss cable is recommended.
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