What are LMR 600 Coaxial Cables?

1 Answer
Can you answer this question?

- everything RF

Mar 28, 2023

LMR 600 Coaxial Cables are a type of cable that has been designed to offer flexibility and shielding against EMI related effects, while maintaining low signal attenuation. It is suited for wireless communication system applications.

LMR 600 Coaxial Cable

LMR 600 Coaxial Cable Construction

The LMR 600 is a 50-ohm, low-loss, flexible, double-shielded coaxial cable with an overall diameter of 0.59 inches and a voltage rating of up to 4000 VDC. It has an internal solid bare copper-clad aluminum conductor (carrying the electrical signal), which is enclosed by an insulation layer made of Foam Polyethylene (Foam PE). The insulation layer is then completely enclosed by two shield layers. The first shielding layer is made of aluminum tape, and the outer shield is made of a tinned copper braid. The shields form an outer conductor, which also provides protection from electromagnetic interference (EMI). Finally, the structure is covered with an outermost layer - called a jacket - made of Polyethylene (PE). The jacket protects the cable core from mechanical, moisture, chemical issues and other environmental conditions. 

The LMR 600 cable exhibits capacitance of approximately 23.4 pF/ft (76.9 pF/m) and signal attenuation of around 2.5 dB/100 ft at 900 MHz (signal attenuation of the cable depending on the frequency) and has a velocity of propagation of 85%. It has a center conductor measuring 0.176 inches (4.47 mm) in diameter and an insulation layer measuring 0.455 inches (11.56 mm) in diameter. The double shielding structure of the LMR 600 coaxial cable offers RF shielding of more than 90 dB.

The flexible, low-loss LMR 600 cable is ideal for use in jumper assemblies in wireless communications systems, short antenna feeder runs, and any application (e.g., WLL, GPS, LMR, WLAN, WISP, WiMAX, SCADA, Mobile Antennas) requiring an easily routed, low loss RF cable.

Key Specifications of LMR 600 Coaxial Cables


Typical Value

Overall Diameter (inch)


Characteristic Impedance (Zo)

50 ohms

Maximum Voltage Rating (VDC)

4000 V

Cable Capacitance (pF/ft)


Inductance (µH/ft)


Attenuation (dB/100 ft, @ 900 MHz)



Foam Polyethylene (Foam PE)

Minimum Bend Radius (inch), installation


Click here to view other RF coaxial cables on everything RF.