Coaxial cables are everywhere—from your cable TV to high-frequency RF communication systems. But are all coaxial cables the same? Definitely not. For engineers, integrators, and industrial buyers, understanding the types of coaxial cables is critical for signal integrity, system performance, and long-term reliability.
In this guide, I’ll walk you through the key classifications, comparison tables, selection tips, and common pitfalls—so you can confidently choose the right cable for your application.
Why It Matters to Know the Types of Coaxial Cables
Common Pain Points from Buyers and Installers
- Choosing the wrong impedance leads to signal mismatch and loss.
- Using a cable with poor shielding invites EMI problems.
- Overspending on a high-end cable when a basic type would suffice.
How This Guide Helps
Whether you’re designing a wireless device, upgrading an RF lab setup, or sourcing bulk cable for OEM production, this article is written to:
- Clarify the structural and electrical differences among coax types
- Help you match cable to frequency range, connector, and usage environment
- Prevent over/under-specification issues
What Is a Coaxial Cable? A Quick Refresher
A coaxial cable consists of:
- Center conductor – carries the RF signal
- Dielectric insulator – maintains spacing
- Shielding – prevents EMI ingress/egress
- Outer jacket – physical protection
These layers maintain a consistent impedance and isolate the signal, making coax ideal for radio frequency, video, and broadband signals.
Common Uses:
- TV/cable transmission (RG6, RG59)
- Test equipment and lab setups (RG58)
- Wireless modules and embedded systems (RG174, RG316)
- Long-run RF feeds (LMR series)
Classification of Coaxial Cable Types
By Impedance
- 50 Ohm – used in RF communication, testing, antennas
- 75 Ohm – optimized for video, broadcast, and cable distribution
By Flexibility
- Standard – typical PVC jacket, general-purpose
- Semi-Rigid – fixed bends, used in aerospace/labs
- Ultra-Flexible – silicone or TPE jacket, tight routing
By Frequency & Loss
- RG Series – legacy military spec (e.g., RG58, RG174)
- LMR Series – low-loss modern replacements, higher performance
By Shielding
- Single shield – braid only, minimal EMI protection
- Dual shield – braid + foil, better shielding
- Quad shield – two braids + two foils, max EMI rejection
Note: “RG” numbers do not guarantee performance—always check actual specs.
Comparison of Common Coaxial Cable Types
| Model | Impedance | Max Frequency | Shielding | Typical Application |
|---|---|---|---|---|
| RG6 | 75Ω | ~1 GHz | Quad Shield | Cable TV, CCTV, satellite |
| RG59 | 75Ω | ~500 MHz | Dual Shield | Analog video, legacy CCTV |
| RG58 | 50Ω | ~1 GHz | Single Shield | RF testing, low-power comm |
| RG174 | 50Ω | ~3 GHz | Single Shield | GPS, compact devices, modems |
| RG316 | 50Ω | ~3 GHz | Teflon Shield | Aerospace, instrumentation |
| LMR-100 | 50Ω | ~6 GHz | Foil+Braid | Wi-Fi, LTE, outdoor wireless |
Which Coaxial Cable Should You Choose?
Ask yourself these questions:
- Do I need 50Ω (RF) or 75Ω (video) impedance?
- Will the cable be installed in tight bends or flexible routes?
- Is the signal analog, digital, high-frequency?
- Indoor or outdoor use? Static or mobile?
Suggested Use by Application:
- Video Transmission → RG6, RG59 (75Ω)
- RF Modules, GPS → RG174, RG316 (50Ω)
- High-Frequency Wireless → LMR series (50Ω, low loss)
- Lab Test Cables → RG58, Semi-Rigid (stable impedance)
If you answered “yes” to needing compact, flexible, and shielded cables for signal-sensitive applications—consider RG316 or LMR-100.
Mistakes to Avoid When Selecting Coaxial Cable
1. Assuming All RG Numbers Are Compatible
Different RG cables have different impedance, shielding, and diameters—don’t swap blindly.
2. Ignoring Connector Type Compatibility
BNC, SMA, F-type, and N connectors require specific diameters and impedance matches.
3. Overlooking Shielding Level
In environments with EMI, use at least dual shield or LMR-type cables.
4. Disregarding Environmental Rating
Outdoor cables need UV resistance and possibly waterproofing—don’t install indoor cables outside.
FAQ – Common Questions About Coaxial Cable Types
Q1: What does “RG” stand for?
Originally “Radio Guide”—a military specification; today it mainly denotes general type, not performance.
Q2: Can I use RG6 instead of RG59?
Yes, for many video uses. RG6 has better shielding and lower loss, but check connector fit.
Q3: What’s the difference between LMR and RG cables?
LMR cables offer lower loss, better shielding, and wider frequency handling. They’re newer and optimized.
Q4: Is more shielding always better?
Not always—more shielding means less flexibility. Choose based on EMI levels and routing constraints.
Q5: Which cable suits 5G or Wi-Fi 6 antenna feeds?
Use low-loss cables like LMR-100, LMR-200, or RG316 depending on frequency and distance.
Choose the Right Coaxial Cable Supplier
At Bafitop, we support RF integrators, equipment makers, and project engineers with:
- A wide range of RG and LMR coaxial cables
- OEM-ready custom coaxial cable assemblies
- Technical support for cable + connector compatibility
- Bulk supply, private label, and engineering samples
Whether you’re building a wireless system, upgrading test cables, or integrating antennas—we help you choose the right cable with confidence.
Get Expert Support on Coaxial Cable Selection
Need help selecting the right coaxial cable or assembly?
Our RF cable specialists will assist you with technical specs, datasheets, and project recommendations.
📩 Email: sales@bafitop.com
📞 Phone: +86-15817341810
🌐 Website: www.bafitop.com
