When designing or upgrading a TV distribution system, CCTV network, or RF communication link, choosing the right coaxial cable can make or break your signal performance. But with so many “RG” models—RG6, RG59, RG11, RG8, and others—how do you know which one fits your project?
In this guide, we break down the most common types of coaxial cables, compare their specs and use cases, and help you select the best one for your installation needs.
What Is a Coaxial Cable and Why Do Types Matter?
A coaxial cable (or coax) is designed to carry high-frequency electrical signals with minimal loss and interference. Its layered structure typically includes:
- Center conductor (solid or stranded copper)
- Dielectric insulator
- Shielding (braid + foil)
- Outer jacket (PVC or PE)
But not all coax cables are the same. They vary by:
- Impedance (usually 50Ω or 75Ω)
- Diameter and flexibility
- Attenuation (signal loss) over distance
- Shielding effectiveness
Choosing the wrong type can lead to signal loss, interference, or even equipment mismatch.
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The Most Common Types of Coaxial Cables
Here’s a breakdown of popular coax types used in commercial and industrial systems:
RG59 – Flexible and Compact
- Impedance: 75Ω
- Use Case: Analog CCTV, short video runs
- Features: Slim, easy to route
- Limitations: Higher attenuation, not ideal for long runs or HD signals
RG6 – The TV and Satellite Standard
- Impedance: 75Ω
- Use Case: Digital TV, satellite, DVB-T
- Features: Quad-shielded, lower signal loss
- Connector: F-type
Most modern TV setups use RG6 due to its durability and wide frequency range.
RG11 – Best for Long Cable Runs
- Impedance: 75Ω
- Use Case: Cable TV backbones, long-distance TV feeds
- Features: Thicker core, even lower loss than RG6
- Tradeoff: Less flexible, harder to bend
RG8 / RG213 – RF and Base Station Grade
- Impedance: 50Ω
- Use Case: VHF/UHF radios, repeaters, base stations
- Features: Low-loss, weather-resistant jackets
- Connector: N-type or PL-259
RG316 / LMR Series – Compact RF Cabling
- Impedance: 50Ω
- Use Case: Embedded RF modules, GPS, Wi-Fi
- Features: Very thin, high-frequency capable
- Used In: IoT, drones, test benches
Coaxial Cable Comparison Table
| Cable Type | Impedance | Outer Diameter | Attenuation (100ft @ 100MHz) | Typical Application |
|---|---|---|---|---|
| RG59 | 75Ω | ~6.1 mm | ~4.1 dB | CCTV, analog video |
| RG6 | 75Ω | ~7.0 mm | ~2.6 dB | TV, satellite, modems |
| RG11 | 75Ω | ~10.2 mm | ~1.5 dB | Long-distance cable runs |
| RG213 | 50Ω | ~10.3 mm | ~1.2 dB | RF, repeater base stations |
| RG316 | 50Ω | ~2.5 mm | ~8.5 dB | GPS, RF testing, compact RF |
How to Choose the Right Coax for Your Needs
Ask yourself the following:
- Is your system 75Ω (TV, CCTV) or 50Ω (RF)?
- Is your cable run over 100 ft? → Consider RG11 or RG213
- Is the installation outdoor or in high EMI areas? → Use quad-shielded cables
- Do you need flexibility for tight bends? → Go with RG59 or RG316
Rule of thumb: Use RG6 for most modern TV/satellite setups. Upgrade to RG11 or RG213 when length or interference is an issue.
Matching Connectors to Coaxial Cable Types
Choosing the wrong connector can lead to poor signal integrity or connector damage.
Connector Compatibility Table
| Connector | Interface Type | Matches Cable | Use Case |
|---|---|---|---|
| F-Type | Threaded | RG6, RG59 | TV, modem, DVB-T, satellite |
| BNC | Bayonet | RG59 | CCTV, test benches |
| N-Type | Threaded | RG8, RG213 | Outdoor antennas, base stations |
| SMA | Threaded | RG316 | GPS, RF modules, embedded boards |
Typical Use Cases by Industry
- CCTV Installers: RG59 + BNC (for analog) or RG6 + F-type (for digital HD)
- Satellite and Cable TV: RG6 or RG11 with F-type connectors
- Wireless ISPs / Telecom: RG213 or LMR-400 with N-type
- OEM RF Device Makers: RG316 with SMA for internal boards
Bafitop’s Recommended Coax Cables
| Model | Impedance | Key Features | Application |
|---|---|---|---|
| RG6 Quad | 75Ω | PE jacket, UV-resistant | TV, satellite, outdoor use |
| RG59 Solid | 75Ω | Solid copper, flexible PVC jacket | CCTV, indoor runs |
| RG213-LL | 50Ω | Ultra-low loss, PE jacket | RF, telecom towers |
| LMR-240 | 50Ω | Lightweight, UV-rated | GPS, radio, IoT devices |
All cables available with matching connectors and custom cut lengths.
FAQs
What’s the difference between RG6 and RG59?
RG6 is thicker, supports longer runs and higher frequencies. RG59 is more flexible but has higher loss.
Can I use RG6 for CCTV?
Yes, especially for HD analog or digital CCTV with F-type connectors.
Why is RG11 used for long runs?
Its thicker conductor and dielectric reduce attenuation, keeping signal strong over long distances.
Is RG8 the same as LMR-400?
They are functionally similar (50Ω low-loss cables), but LMR-400 is more flexible and has a foam dielectric.
Still Not Sure Which Coax You Need?
Whether you’re wiring up 10 cameras or building an RF backbone, we’re here to help.
📧 Email: sales@bafitop.com
📞 Phone: +86-15817341810
We offer free consultation, sample kits, and OEM customizations.
