Radio frequency (RF) cables are at the heart of modern wireless communication. From cellular base stations to GPS antennas and TV broadcasts, these cables ensure that high-frequency signals travel reliably, efficiently, and safely.
In this guide, we’ll break down what RF cables are, the types available (RG, LMR, and beyond), how to read cable standards, where these cables are used, and how to choose the right one for your application. Whether you’re an RF engineer, procurement manager, or system integrator, this guide will help you make confident, informed decisions.
What Is an RF Cable?
An RF cable—short for radio frequency coaxial cable—is a type of cable specifically designed to carry high-frequency electrical signals from one point to another with minimal signal loss.
Basic Structure
An RF coaxial cable typically consists of:
- Center Conductor: Carries the RF signal
- Dielectric Insulator: Maintains spacing between layers
- Metal Shielding: Prevents signal interference (EMI)
- Outer Jacket: Protective plastic layer for durability
Why use coaxial design?
The concentric structure prevents electromagnetic interference and signal radiation, especially at GHz frequencies.
Types of RF Coaxial Cables
Choosing the right RF cable starts with understanding the available types and their characteristics.
RG Series (Radio Guide)
The RG series is one of the oldest and most recognized categories of coax cables.
| Model | Impedance | Use Case | Typical Connector |
|---|---|---|---|
| RG-6 | 75 Ω | Satellite TV, DTV, CCTV | F-Type |
| RG-58 | 50 Ω | Wi-Fi, Ham Radio, RF labs | BNC/PL-259 |
| RG-8X | 50 Ω | VHF/UHF antennas, marine systems | PL-259 |
| RG-213 | 50 Ω | HF radios, repeaters, longer runs | N-Type |
Pros: Widely available, affordable, flexible
Cons: Higher signal loss compared to newer cables
LMR Series (Low Loss)
Designed by Times Microwave, LMR cables offer superior performance, especially at higher frequencies or longer distances.
| Model | Loss @ 1GHz (dB/100ft) | Flexibility | UV Resistance | Common Use |
|---|---|---|---|---|
| LMR-195 | ~6.7 | High | Yes | WiFi antennas, LTE modems |
| LMR-240 | ~4.4 | Medium | Yes | GPS, Cellular repeaters |
| LMR-400 | ~2.0 | Moderate | Yes | Base stations, RF links |
| LMR-600 | ~1.3 | Low | Yes | Long-distance RF systems |
Pros: Low attenuation, weatherproof, excellent shielding
Cons: Slightly more rigid and expensive
Specialty RF Cables
- Semi-Rigid Coax: Used in aerospace and test setups
- Twinax/Triax: For balanced transmission and broadcast
- Double/Triple Shielded: Extra EMI protection in dense environments
Need something unique? Bafitop offers custom RF cable assemblies with your choice of length, connector, and shielding.
Understanding RF Cable Standards
Making the wrong cable choice can result in signal degradation, mismatched impedance, or even system failure. Here’s what you need to know.
Impedance: 50 vs 75 Ohm
- 50 Ohm: Used in RF transmission (WiFi, antennas, radio)
- 75 Ohm: Used for signal reception (TV, CCTV, SAT)
Quick Check: Is your device labeled “50Ω” or “75Ω”? Match it accordingly.
Frequency & Attenuation
Higher frequencies generally cause higher losses. Always check:
- Attenuation Rating (dB/100m)
- Maximum Frequency Handling
- Distance Sensitivity: Longer cables = more loss
Connector Compatibility
Make sure your cable ends match your device ports.
| Connector Type | Typical Use Case |
|---|---|
| BNC | Labs, test equipment |
| PL-259 | Ham radio, marine |
| N-Type | Outdoor wireless, 5G antennas |
| SMA | GPS modules, cellular modems |
| F-Type | Satellite and digital TV receivers |
At Bafitop, we supply RF cables with pre-terminated connectors or pigtail ends based on your spec.
Common Applications of RF Cables
Wondering where RF cables are used in the real world? Here’s a breakdown of typical deployments:
| Industry / Use Case | Description |
|---|---|
| Telecom Base Stations | Connect antennas to transceivers and repeaters |
| TV & Broadcast Systems | Deliver video/audio from satellite dishes to receivers |
| Vehicle-Mounted Systems | VHF/UHF communication on boats, trucks, emergency vehicles |
| Military & Aerospace | Semi-rigid high-stability cables for avionics and radar |
| Industrial Automation | Signal transfer between PLCs, sensors, and radio devices |
How to Choose the Right RF Cable
Still unsure? Let’s walk through the selection logic.
Ask Yourself:
- What frequency range does my system operate at?
- How long is the cable run?
- Is the setup indoor or outdoor?
- Do I need flexibility or rigidity?
- What connectors are required?
Use-Case Based Cable Selection
| Scenario | Suggested RF Cable |
|---|---|
| WiFi Router Antenna (indoor) | LMR-195 / RG-58 |
| TV or SAT dish to receiver | RG-6 (75Ω) |
| GPS antenna in marine environment | RG-8X with SMA / N-Type |
| Base station to antenna | LMR-400 or RG-213 |
| Radar/Military comms | Semi-rigid 50Ω cable |
Need to order in bulk or custom-cut lengths? We support OEM and ODM orders.
Why Bafitop Is Your Trusted RF Cable Partner
At Bafitop, we’re not just another cable supplier—we’re your technical solution provider. Here’s what sets us apart:
- Over 10 years of RF industry experience
- Full range of RG, LMR, and marine-grade cables
- Custom assemblies with PL-259, N-Type, SMA, BNC
- OEM branding and packaging support
- Global delivery to 40+ countries in telecom, defense, and automation
Contact Us for Samples or Technical Consultation
Need technical advice or a datasheet for your project?
Looking for a reliable supplier for your RF coaxial cables?
Email: sales@bafitop.com
Phone: +86-15817341810
Request a Free Sample or Send Inquiry →
Frequently Asked Questions (FAQ)
Q1: What’s the difference between RG-6 and RG-58?
RG-6 has 75Ω impedance (TV/SAT), while RG-58 has 50Ω (radio, RF transmission).
Q2: Can I use LMR-400 instead of RG-213?
Yes, LMR-400 typically offers lower loss and better outdoor performance than RG-213, though it is less flexible.
Q3: Do you offer waterproof RF cables for marine use?
Absolutely. Bafitop provides outdoor-rated RG-8X, RG-213, and LMR cables with UV and moisture resistance.
Q4: How long can I run an RF cable before the signal degrades?
It depends on the cable type and frequency. For instance, LMR-400 can handle longer runs (up to 30m+) at 2.4GHz with minimal loss.
Q5: What’s your MOQ for custom RF cable assemblies?
We support flexible minimum order quantities based on project scale—reach out for a tailored quote.
