If you’ve ever worked with RF (radio frequency) communications, cellular networks, or antenna systems, you may have come across the term LMR® cable. But what exactly is it, and why is it so widely used? In this post, we’ll explore what LMR® cable is, its key features, and why it’s a top choice for RF applications and answer the question ”what is LMR cable?”.
Understanding LMR® Cable
LMR® cable is a type of coaxial cable designed for high-performance, low-loss signal transmission in RF applications. Manufactured by Times Microwave Systems, LMR® cables are known for their superior shielding, low signal loss, and durability, making them ideal for wireless communication, GPS, radar, and other RF-based systems.
Unlike traditional coaxial cables, LMR® cables are engineered with multiple layers of shielding and dielectric materials to ensure optimal signal integrity. They are available in various sizes, such as LMR®-195, LMR®-240, LMR®-400, and LMR®-600, each designed for different power handling and signal loss requirements.
Key Features of LMR® Cable
LMR® cables stand out in the world of coaxial cables due to their unique construction and performance benefits:
1. Low Signal Loss
One of the most important advantages of LMR® cable is its low attenuation (signal loss) over long distances. This is achieved through high-quality dielectric insulation and shielding, which reduces energy loss as the signal travels through the cable.
2. Superior Shielding
LMR® cables are designed with multiple shielding layers, typically including:
- An aluminum tape shield for primary EMI (electromagnetic interference) protection.
- A braided outer shield that enhances durability and further minimizes interference.
This shielding ensures a stronger and cleaner signal, making LMR® cable ideal for sensitive RF applications.
3. Durability and Weather Resistance
Times Microwave Systems manufactures LMR® cables with tough outer jackets made from polyethylene (PE) or thermoplastic elastomer (TPE), making them resistant to UV radiation, moisture, and extreme temperatures. Some variants, like LMR®-UF (Ultra-Flex), offer added flexibility for installations requiring frequent bending and movement.
4. Flexible and Easy to Install
Compared to traditional rigid coaxial cables, LMR® cables are highly flexible and lightweight, making installation easier. Their bend radius is significantly smaller than comparable RF cables, which allows for tight installations in confined spaces.
5. Compatibility with RF Connectors
LMR® cables support a wide range of connectors, including:
- N-type connectors (common for antennas and RF applications).
- SMA connectors (used in wireless and GPS systems).
- BNC connectors (popular in broadcasting and networking).
This compatibility makes them highly versatile for various industries.
Common Applications of LMR® Cable
Thanks to its excellent performance, LMR® cable is widely used in industries that rely on RF communications. Some of the most common applications include:
- Wireless and Cellular Networks
- Antenna and RF Systems
- GPS and Satellite Communications
- Military and Aerospace Applications
- Surveillance and Security Systems
Choosing the Right LMR® Cable
Selecting the right LMR® cable type depends on several factors, including frequency, distance, power handling, and environmental conditions. Here are some popular options:
- LMR®-195 & LMR®-240: Suitable for short-distance applications such as Wi-Fi antennas and GPS systems.
- LMR®-400: A mid-range option with low loss, commonly used for cellular and two-way radio systems.
- LMR®-600: Ideal for long-distance applications where signal loss must be minimized.
If you need flexibility for mobile applications, LMR®-UF (Ultra-Flex) cables are a great choice.
Conclusion
LMR® cable is an industry-standard coaxial cable that offers low signal loss, high shielding, and durability, making it an ideal choice for RF and wireless applications. Whether you're setting up an antenna, installing a security system, or working in aerospace, LMR® cables provide superior performance and reliability.
When selecting an LMR® cable, consider the required distance, frequency, and flexibility needs to ensure optimal performance for your specific application. We hope we answered your question ”what is LMR cable?”. With the right LMR® cable, you can achieve stronger, clearer, and more efficient communication.
