How to Choose the Right Specifications for Your Double Shielded Coax Cable

Double shielded coax cables are a type of coaxial cable that has two layers of shielding, which provides increased protection against electromagnetic interference (EMI). This makes them an ideal choice for use in applications where EMI is a concern, such as in high-frequency data transmission or in areas with high levels of electrical noise.

When choosing a double shielded coax cable, there are a number of factors to consider, including the following:

Cable Impedance

The impedance of a coax cable is a measure of its resistance to the flow of alternating current (AC). The impedance of a coax cable is typically measured in ohms, and the most common impedance for double shielded coax cables is 75 ohms. However, there are also 50-ohm and 93-ohm double shielded coax cables available.

The impedance of the coax cable must match the impedance of the devices that it will be connected to. If the impedance of the coax cable does not match the impedance of the devices, it can cause signal loss and other problems.

Cable Attenuation

The attenuation of a coax cable is a measure of how much signal is lost over a given distance. The attenuation of a coax cable is typically measured in decibels per 100 feet (dB/100 ft). The lower the attenuation, the less signal loss there will be.

The attenuation of a coax cable is affected by a number of factors, including the frequency of the signal, the length of the cable, and the quality of the cable.

Cable Shielding

The shielding of a coax cable is designed to protect the cable from EMI. The shielding of a coax cable is typically made of a metal foil or braid. The thicker the shielding, the better the protection against EMI.

The shielding of a coax cable is typically rated in decibels (dB). The higher the dB rating, the better the shielding.

Cable Jacket

The jacket of a coax cable is the outer layer of the cable. The jacket protects the cable from the elements and from physical damage. The jacket of a coax cable is typically made of a PVC or polyethylene material.

The jacket of a coax cable is typically rated for a specific temperature range. The jacket should be rated for the temperature range that the cable will be used in.

When choosing a double shielded coax cable, it is important to consider the following factors: cable impedance, cable attenuation, cable shielding, and cable jacket. By considering these factors, you can choose the right double shielded coax cable for your application.