RG-213 is a type of RF coaxial cable commonly used in VHF/UHF radio communications and broadcasting. It is characterised by its robust construction, with a thick polyethylene dielectric and a dense braided copper shield, providing excellent protection against physical damage and electromagnetic interference. However, due to its large diameter and relatively high weight, it can be challenging to install in tight spaces or over long distances. Its signal attenuation is higher than some other equvalent types of coaxial cable, particularly at higher frequencies, due to its single outer conductor/shield. Despite these drawbacks, RG-213 remains a popular choice for many applications due to its durability and cost-effectiveness.

Manufacturer variants support a max frequency typically 1 to 2 GHz, but up to 3 GHz is possible.

RG213 coaxial cable layers

RF Specification

Min. Frequency
0 GHz
Max. Frequency
2 GHz
Shielding Effectiveness
> 57 dB
Capacitance
101.05 pF/m
RF Operating Voltage
3700 Vrms
Impedance
50 Ω
Velocity
66%
Attenuation Table
Frequency Attenuation
1000 MHz
0.23 dB/m

Physical Specification

Flexibility
Flexible
Colour
Black
Min. Bend Radius Static
40 mm
Min. Operating Temperature
-40 °C
Max. Operating Temperature
85 °C
Weight (g/m)
163.5 g
Cable Layers
Layer Diameter Materials Notes
Inner Conductor
2.25 mm
Solid Copper
7x0.75 mm Strand
Dielectric
7.24 mm
Polyethylene (PE)
Outer Conductor
7.85 mm
Solid Copper Braid
Outer Jacket
10.30 mm
Polyvinyl Chloride (PVC)