If you have ever used RF (radio frequency) communication, cellular networks, or antenna systems, you may encounter the term LMR cable. But what exactly is it and why is it so widely used? In this article, we will explore what LMR cable is, its key characteristics, and why it is the preferred choice for RF applications, and answer the question 'What is LMR cable?'.
Understand LMR coaxial cable
LMR cable is a coaxial cable designed for high-performance, low loss signal transmission in RF applications. LMR cables are manufactured by Times Microwave Systems and are renowned for their excellent shielding, low signal loss, and durability, making them ideal for wireless communication GPS、 Ideal choice for radar and other RF based systems. Unlike traditional coaxial cables, LMR cables are designed with multiple layers of shielding and dielectric materials to ensure better signal integrity. They come in various sizes to choose from, such as LMR-195, LMR-240, LMR-400, and LMR-600, each designed for different power processing and signal loss requirements.
Main characteristics of LMR coaxial cable
LMR cables stand out in the field of coaxial cables due to their unique structure and performance advantages:
1. Low signal loss
One of the most important advantages of LMR cables with low signal loss is their low attenuation over long distances (signal loss). This is achieved through high-quality dielectric insulation and shielding, which reduces energy loss when signals pass through cables.
2. Excellent shielding performance
LMR cable design has multiple shielding layers, typically including aluminum strip shielding for primary EMI (electromagnetic interference) protection. Weaving external shielding enhances durability and further reduces interference. This shielding ensures stronger and clearer signals, making LMR cables an ideal choice for sensitive RF applications.
3. Durability and weather resistance
Times Microwave Systems produces LMR cables, whose sturdy outer sheath is made of polyethylene (PE) or thermoplastic elastomer (TPE), making it resistant to ultraviolet radiation, moisture, and extreme temperatures. Some variants, such as LMR-UF (Ultra Flex), provide additional flexibility for installations that require frequent bending and movement.
4. Flexible and convenient installation
Compared with traditional rigid coaxial cables, LMR cables have high flexibility and lightweight, making installation easier. Their bending radius is significantly smaller than that of similar RF cables, which allows for tight installation in enclosed spaces.
5. Compatibility with RF connectors
LMR cables support multiple connectors, including N-type connectors (commonly used in antenna and RF applications). SMA connector (for wireless and GPS systems). BNC connector (popular in broadcasting and networking). This compatibility makes them highly versatile in various industries.
Common Applications of LMR Cables
Thanks to its excellent performance, LMR cables are widely used in industries that rely on RF communication. Some of the most common applications include wireless and cellular networks, antenna and RF systems, GPS and satellite communications, aerospace applications, monitoring and security systems.
Choose the correct LMR cable
The selection of the correct LMR cable type depends on several factors, including frequency, distance, power handling, and environmental conditions. Here are some common options:
LMR-195 and LMR-240: Suitable for short-range applications such as Wi Fi antennas and GPS systems.
LMR-400： A low loss mid-range option commonly used in cellular and two-way radio systems.
LMR-600： Very suitable for long-distance applications where signal loss must be significantly reduced.
If you need the flexibility of mobile applications, LMR-UF (Ultra Flex) cable is also a good choice.
Post time: Mar-13-2025