What are RG164 Coaxial Cables?

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- everything RF

Jan 19, 2023

RG164 Coaxial Cables are a type of cable that has been designed for high frequency signal transmission. They exhibit high signal integrity and low signal attenuation making them ideal for long-range communication and networking applications.


The RG164/A/U is a 75-ohm coaxial cable with an overall diameter of 0.870 inches and a voltage rating of up to 10000 Vrms. It has an internal bare copper conductor (carrying the electrical signal), which is enclosed by an insulation layer made of Polyethylene (PE). The insulation layer is then completely enclosed by 1 bare copper braid shield that forms the outer conductor and also provides shielding against electromagnetic interference (EMI). Finally, the structure is covered with an outermost layer - called a jacket - made of Polyvinyl Chloride (PVC). The jacket protects the cable core from mechanical, moisture, and chemical issues.

The RG164/U cable exhibits capacitance of approximately 21 pF/ft (69.07 pF/m), and signal attenuation of around 2.8 dB/100 ft at 400 MHz (signal attenuation of the cable depending on the frequency). It has a center conductor measuring 0.1045 inches (2.65 mm) in diameter and an insulation layer measuring 0.680 inches (17.2 mm) in diameter.

Key Specifications of RG-164/U Coaxial Cables


Typical Value

Overall Diameter (inch)


Characteristic Impedance (Zo)

75 ohms

Maximum Voltage Rating (RMS)

10000 V

Cable Capacitance (pF/ft)


Attenuation (dB/100 ft, @ 400 MHz)



Polyethylene (PE)

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