Choosing the right coaxial cable is critical for ensuring performance in RF systems, television setups, data communication, and industrial networks. With so many types and RG numbers available, how do you know which one is best for your application?
In this article, we break down the most common types of coaxial cables, their properties, and use cases so you can make informed decisions.
Understanding Coaxial Cable Basics
What Makes a Cable “Coaxial”?
A coaxial cable is a type of transmission line that consists of:
- Inner conductor: carries the electrical signal
- Dielectric insulator: separates the inner and outer conductors
- Outer conductor (shield): prevents EMI (electromagnetic interference)
- Protective jacket: provides mechanical and environmental protection
This structure makes coaxial cables ideal for high-frequency transmission with low signal loss.
Impedance: 50Ω vs 75Ω
- 50Ω cables are used for RF transmission and communication
- 75Ω cables are used for video and broadcast applications
Most Common Types of Coaxial Cables (by RG Number)
| Cable Type | Impedance | Use Case | Frequency Range | Notes |
|---|---|---|---|---|
| RG6 | 75Ω | TV, Satellite | Up to 3 GHz | Low loss for video |
| RG59 | 75Ω | CCTV | Up to 1 GHz | Higher loss over long runs |
| RG58 | 50Ω | RF Communication | Up to 1 GHz | Common in RF test setups |
| RG174 | 50Ω | IoT, GPS, Wi-Fi | Up to 2 GHz | Thin, flexible for tight spaces |
| RG213 | 50Ω | Outdoor RF links | Up to 10 GHz | Thick, durable, low attenuation |
| LMR-400 | 50Ω | Base station, LTE | Up to 6 GHz | Low-loss, premium performance |
How to Choose the Right Coaxial Cable
Based on Application
- TV and Satellite: RG6 is preferred due to its 75Ω impedance and low loss for video signals
- CCTV and Analog Video: RG59 is commonly used but not ideal for high-frequency applications
- RF Modules and Wi-Fi Routers: RG174 or RG58 offers flexibility and low loss
- Outdoor Long Range Antennas: RG213 or LMR-400 ensures signal integrity over distance
Consider Cable Loss
Signal loss increases with:
- Frequency
- Cable length
- Poor shielding
Check dB/m ratings and match with system requirements.
Environmental Resistance
- Outdoor use: UV-resistant jackets like PE
- Mobile systems: Flexibility and connector ruggedness
Connector Compatibility
Choosing the correct connector is just as important:
| Connector Type | Typical Use Case | Matches with Cable |
|---|---|---|
| F-type | TV, satellite setups | RG6, RG59 |
| SMA | RF modules, GPS, Wi-Fi | RG174, RG316 |
| N-type | Outdoor base stations | RG213, LMR-400 |
| BNC | CCTV, test equipment | RG58, RG59 |
Always ensure impedance matching between cable and connector to avoid reflection loss.
Bafitop’s Coaxial Cable Solutions
We at Bafitop Technology Co., Ltd. offer:
- Standard coax cables: RG6, RG58, RG174, RG213, RG316
- Custom assemblies: SMA, N-type, BNC, F-type
- OEM & ODM services: Length, shielding, connector type
Our cables are used globally in:
- Industrial communication
- IoT modules
- TV and satellite distribution
- RF test benches
📧 For inquiries: sales@bafitop.com
📞 +86-15817341810
FAQ – Coax Cable Types
Q1: Can I use RG6 for my Wi-Fi antenna?
A: Not ideal. RG6 is 75Ω, while most Wi-Fi antennas require 50Ω cables like RG174 or RG58.
Q2: Is RG174 better than RG58?
A: It depends. RG174 is thinner and more flexible, but RG58 has lower loss over distance.
Q3: Can RG59 replace RG6?
A: RG59 has higher loss and is less effective for high-frequency signals than RG6.
Q4: What’s the best cable for outdoor antennas?
A: LMR-400 or RG213 due to their low attenuation and rugged jackets.
