How to know what type of coax cable to buy?

How to know what type of coax cable to buy?

What’s the best coaxial cable for your application?

Selecting the right cable can go a long way toward fulfilling the requirements of a specific application. The development of wireless and high-speed data applications has only increased coaxial cabling usage beyond just popular video and telecommunications uses. With the emergence and standardization of coaxial cabling for numerous applications, the use of coax has become prevalent in the home, office, telecommunication facility, rail platform, and industrial factory. This application diversification has also directed to the diversification of coaxial cable types, grades, and manufacturers. Guaranteeing the right considerations are made can help avoid any installation problems, which are now more costly than ever.

Some important factors to consider when choosing coaxial cables include:

1-. The Application Requirements and Parameters

The initial step is always understanding what problem has to be solved. When it comes to a coaxial cable, this is knowing the qualities of signals that the cable will be carrying. Some important factors include the frequency range and the power levels of the signals being transmitted. Other aspects include the RF and electromagnetic environment the signals will be routed through, the routing length, and how complex the routing will be.

2-. Characteristic Impedance

A coaxial cable’s characteristic impedance is a fundamental parameter that influences the signal’s performance that is transmitted over the cable. 

The cable’s impedance should always match the load’s impedance/resistance for the best signal transfer. It is necessary to consider that RG-style coaxial cables are not all built the same. Technicians recommend taking a look at the specification requirements before buying it.


How to know what type of coax cable to buy?


3-. Cable Attenuation

The signal energy is lost as heat energy as a result of the resistance from the conductors, the dissipation factor of the dielectrics, and some other aspects associated with the material quality in the coaxial cable. Cable attenuation is the level of signal loss over a particular distance. Typically, a higher frequency leads to a more considerable attenuation. The larger the caliber of a cable’s middle conductor, the lower the attenuation will be.

4-. Cable Performance is Frequency-Dependent

Each coaxial cable has various performance parameters, which vary over frequency, described in their datasheets. This involves attenuation and power handling specifications. Usually, the higher frequency signals are affected by greater resistive losses, consequently leading to attenuation. Additionally, a coaxial cable begins to act as a waveguide and an inefficient Transverse electromagnetic transmission line at a determined high enough frequency; this is known as the cut-off frequency and should be well above the highest frequency of any desired transmission signals.

5-. Power Ratings

Based on the cable’s diameter, the type of middle and external conductors, and the cable’s quality, different maximum power handling ratings will vary from a cable to another. These ratings could be given in continuous, average, or peak power figures, and they do indicate different things depending upon what type of signals are expected.

6-. Not All Coaxial Cables Shields the Same

There are various types of styles of outer conductors and shielding. Some cables may have many layers of shielding beyond the outer conductor to decrease the interference received and transmitted from the coax.

If you would like to receive a quote for any of custom cables or connectors, please do not hesitate to contact us by sending an email to [email protected] or calling in the USA this phone number (682-325-1944).

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